All Wiring Diagrams for Honda Civic Si 2003 model

AIR CONDITIONING

Automatic A/C Wiring Diagram, Hybrid (1 of 2) for Honda Civic Si 2003

List of elements for Automatic A/C Wiring Diagram, Hybrid (1 of 2) for Honda Civic Si 2003:

A/c
A/c pressure sw
A/c sw led
A/c switch
A10
A11
A12
A13
A14
A15
A16
A17
A18
A19
A20
Air mix control motor (on left side of hvac assembly)
Air mix cool
Air mix hot
Air mix poten +5v
Air mix potential
Air temp sens
Amd-p
B10
B11
B12
B13
B14
B15
B16
B17
B18
B19
B20
B21
B22
Base
Blower feedback
Blower motor (under right side of dash)
Blower power transistor (under right side of dash, near blower motor)
Climate control unit
Climate control unit light
Defog sw led
Defogger system
Econ
Econ switch
Econ switch led
Ect sensor
Eng ready sig
Evap temp sens
Evaporator
Fresh
Frs
Fuse 10a
G502 (behind right side of dash)
Gauges and ind
Ground
Heater signal
Hot in on
Ig2
Ig2 (power)
Ign (power)
In-car temp sens
In-car temperature sensor (under middle of dash)
Interior lights system
M-cool
M-def
M-hot
M-vent
Mode 1
Mode 2
Mode 3
Mode 4
Mode control motor (on center of hvac assembly)
Mode def
Mode vent
Outside air temperature sensor (behind left side of front bumper)
Pnk
R window defog sw
Rec
Recir
Recir ctrl sw led
Recir ctrl switch
Recir-a/c-econ switch assembly
Recir-a/c-econ switch light
Recirc
Recirculate
Recirculation control motor (on center of hvac assembly)
Red
S-com
S5v
Sens common gnd
Sunlight sensor
Sunlight sensor (under top center of dash)
Temperature sensor (on left side of hvac assembly)
Underdash fuse/relay box (under left side of dash)
Vsp sensor

Automatic A/C Wiring Diagram, Hybrid (2 of 2) for Honda Civic Si 2003

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List of elements for Automatic A/C Wiring Diagram, Hybrid (2 of 2) for Honda Civic Si 2003:

(acc) relay ctrl
(acs) a/c sw in
(eng rdy) engine ready signal
(fanc) fan ctrl
(hrfanc) fan ctrl
(htrs) htr standby signal
(mrly) relay ctrl
(on left side of engine compt) multi-fuse/ relay box
A/c compressor
A/c compressor clutch
A/c compressor clutch relay
A/c condenser fan motor (forward of radiator)
A/c condenser fan relay
A/c pressure switch (behind left side of a/c condenser fan motor)
A10
A20
Auxiliary fuse holder
B14
B22
Blower motor relay
C11
C13
Cruise control system, electronic power steering system, instrument cluster system
Cvt
Cvt cvt
D10
D13
E11
E18
E28
Ect sensor (rear of engine)
Engine control module (behind glove box)
Engine controls system
Fuse 15a
Fuse 20a
Fuse 40a
Fuse 7.5a
G201 (behind right side of front bumper)
Gauge assembly
High
Hot at all times
Hot restart fan relay
Junction connector c106 (behind glove box)
Low
M m
M/t
Pgm-fi main relay 1 (behind glove box)
Radiator fan motor (behind radiator)
Radiator fan relay
Radiator fan switch (bottom front of engine compt)
Red
Sens gnd
Sens input
Thermal protector
Transmission control module (behind right kick panel)
Underhood fuse/relay box (on left side of engine compt)
Vehicle speed sensor (on transaxle housing)

Heater Wiring Diagram, Except Hatchback for Honda Civic Si 2003

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List of elements for Heater Wiring Diagram, Except Hatchback for Honda Civic Si 2003:

A10
A11
A12
A13
A14
Air delivery
Air mix control motor (on left side of hvac assembly)
Amd-p
B10
B11
B12
B13
B14
B15
B16
B17
B18
B19
B20
B21
B22
Blower controls
Blower motor (under right side of dash)
Blower motor relay
Blower power transistor (under right side of dash, near blower motor)
D13
Defogger
Defogger system
Defrost
Frs
Fuse 10a
Fuse 40a
G502 (under middle of dash)
Ground
Heater control panel
Hot at all times
Hot in on
Ig2
Ignition
Illumination
Interior lights system
M-cool
M-def
M-hot
M-vent
Manual a/c circuit
Mode control motor (on center of hvac assembly)
Mode-1
Mode-2
Mode-3
Mode-4
Rec
Recirc
Recirc-rear defogger switch assembly
Recirculation control motor (on center of hvac assembly)
Red
S-com
S5v
Scom
Solid state
Switch assembly light
Underdash fuse/relay box (under left side of dash)
Underhood fuse/relay box (right side of engine compt)

Heater Wiring Diagram, Hatchback (1 of 2) for Honda Civic Si 2003

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List of elements for Heater Wiring Diagram, Hatchback (1 of 2) for Honda Civic Si 2003:

(under left side of dash) g501
A10
A11
A12
A13
A14
Air mix control motor (under left side of dash)
Air mix cool
Air mix hot
Air mix potental
Air mix potential
Amd-p
B10
B11
B12
B13
B14
B15
B16
B17
B18
B19
B20
B21
B22
Blower feedback
Blower motor (under right side of dash)
Blower power transistor (under right side of dash)
Blwr trans base
Defog led ctrl
Defogger system
Defrost
Fresh
Frs
Fuse 10a
G501 (under left side of dash)
Ground
Heater control panel
Hot in on
Ig2
Ignition
Illumination
Interior lights system
M- def
M- vent
M-cool
M-hot
Mode -1
Mode -2
Mode -3
Mode -4
Mode 1
Mode 2
Mode 3
Mode 4
Mode control motor (under right side of dash)
Mode def
Mode vent
Rear defog
Rear defogger
Rec
Recir-a/c rear defogger switch assembly
Recirc
Recirculate
Recirculation control motor (under right side of dash)
Red
S- com
S-com
S5v
Sensor common
Solid state
Switch light assembly
Underdash fuse/relay box (under left side of dash)

Heater Wiring Diagram, Hatchback (2 of 2) for Honda Civic Si 2003

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List of elements for Heater Wiring Diagram, Hatchback (2 of 2) for Honda Civic Si 2003:

(behind left side of front bumper) g301
Blower motor relay
D13
Ecm (behind glove box)
Fan control (fanc)
Fuse 20a
Fuse 40a
Hot at all times
Radiator fan motor (behind radiator)
Radiator fan relay
Radiator fan switch (under radiator) (closed above: 199 degrees fahenheit 93 degrees celsius)
Red
Underhood fuse/relay box (left side of engine compartment)

Manual A/C Wiring Diagram, Except Hatchback (1 of 2) for Honda Civic Si 2003

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List of elements for Manual A/C Wiring Diagram, Except Hatchback (1 of 2) for Honda Civic Si 2003:

A/c
A10
A11
A12
A13
A14
Air delivery
Air mix control motor (on left side of hvac assembly)
Amd-p
B10
B11
B12
B13
B14
B15
B16
B17
B18
B19
B20
B21
B22
Blower controls
Blower motor (under right side of dash)
Blower power transistor (under right side of dash, near blower motor)
Compressor ctrls
Defogger
Defogger system
Defrost
Evaporator temperature sensor (on left side of hvac assembly)
Frs
Fuse 10a
G502 (under middle of dash)
Ground
Heater control panel
Hot in on
Ig2
Ignition
Illumination
Interior lights system
M-cool
M-def
M-hot
M-vent
Mode control motor (on center of hvac assembly)
Mode-1
Mode-2
Mode-3
Mode-4
Rec
Recirc
Recirc-a/c-rear defogger switch assembly
Recirculation control motor (on center of hvac assembly)
Red
S-com
S5v
Solid state
Switch assembly light
Underdash fuse/relay box (under left side of dash)

Manual A/C Wiring Diagram, Except Hatchback (2 of 2) for Honda Civic Si 2003

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List of elements for Manual A/C Wiring Diagram, Except Hatchback (2 of 2) for Honda Civic Si 2003:

A/c clutch relay
A/c compressor
A/c compressor clutch
A/c compressor clutch relay
A/c condenser fan motor (forward of radiator)
A/c press switch
A/c pressure switch (behind left side of a/c condenser fan motor)
A10
Accessory a/c
Blower motor relay
Communi- cation (sefmj)
Condenser fan relay
D10
D13
E10
E18
E24
Ecm/pcm (behind glove box)
Ect sensor (rear of engine)
Except gx
Factory a/c
Fan control
Fuse 20a
Fuse 40a
G101 (at top right rear side of engine)
G13 (at left front side of engine compartment)
G201 (behind right side of front bumper)
High
Hot at all times
Junction connector c102 (behind glove compartment) (except gx: terminals 5-7) (gx: terminals' 14-16)
Junction connector c103 (on cylinder head cover)
Low
Multiplex control unit
Not used
Optional connector (for a/c) (with accessory a/c installed)
Radiator fan motor (behind radiator)
Radiator fan relay
Radiator fan switch right rear of engine) (closed above: 199 degrees fahrenheit, 93 degrees celsius)
Red
Sedan
Sens gnd
Sens in put
Thermal protector
Underdash fuse/relay box (under left side of dash)
Underhood fuse/relay box (right side of engine compartment)

Manual A/C Wiring Diagram, Hatchback (1 of 2) for Honda Civic Si 2003

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List of elements for Manual A/C Wiring Diagram, Hatchback (1 of 2) for Honda Civic Si 2003:

(under left side of dash) g501
A/c
A/c led ctrl
A/c on input
A/c press switch
A10
A11
A12
A13
A14
Air mix control motor (under left side of dash)
Air mix cool
Air mix hot
Air mix potential
Amd-p
B10
B11
B12
B13
B14
B15
B16
B17
B18
B19
B20
B21
B22
Blower feedback
Blower motor (under right side of dash)
Blower power transistor (under right side of dash)
Blwr trans base
Defog led ctrl
Defogger system
Defrost
Evap temp sensor
Evaporator temperature sensor (under left side of dash)
Fresh
Frs
Fuse 10a
G501 (under left side of dash)
Ground
Heater control panel
Hot in on
Ig2
Ignition
Illumination
Interior lights system
M- def
M- vent
M-cool
M-hot
Mode -1
Mode -2
Mode -3
Mode -4
Mode 1
Mode 2
Mode 3
Mode 4
Mode control motor (under right side of dash)
Mode def
Mode vent
Rear defog
Rear defogger
Rec
Recir-a/c rear defogger switch assembly
Recirc
Recirc led ctrl
Recirc request
Recirculate
Recirculation control motor (under right side of dash)
Red
S- com
S-com
S5v
Sensor common
Solid state
Switch assembly light
Underdash fuse/relay box (under left side of dash)

Manual A/C Wiring Diagram, Hatchback (2 of 2) for Honda Civic Si 2003

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List of elements for Manual A/C Wiring Diagram, Hatchback (2 of 2) for Honda Civic Si 2003:

(acc)
(behind left side of front bumper) g301
(ecu) bus
(fanc)
(sefmj)
A/c compressor
A/c compressor clutch
A/c compressor clutch relay
A/c condenser fan motor (right front of engine compartment)
A/c condenser fan relay
A/c pressure switch (acs)
A/c pressure switch (left front of engine compartment)
Blower motor relay
Communication e24
D10
D13
E10
Ecm (behind glove box)
Fan control b6
Fuse 20a
Fuse 40a
High
Hot at all times
Low
Multiplex control unit
Nca
Radiator fan motor (left front of engine compartment)
Radiator fan relay
Radiator fan switch (under radiator) (closed above: 199 degrees fahrenheit, 93 degrees celsius)
Red
Relay ctrl e18
Thermal protector (above 252 kpa (122 psi)
Underdash fuse/relay box (under left side of dash)
Underhood fuse/relay box (left side of engine compartment)

ANTI-LOCK BRAKES

Anti-lock Brakes Wiring Diagram, Except Hatchback & Hybrid for Honda Civic Si 2003

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List of elements for Anti-lock Brakes Wiring Diagram, Except Hatchback & Hybrid for Honda Civic Si 2003:

A11
A15
A17
A19
Abs indic
Abs indicator circuit
Abs indicator light
Abs modulator- control unit (left side of engine compt)
B15
B18
Brake pedal position switch (under left side of dash)
Brake sw in
C10
Computer data lines system
Dlc input
Ebd
Fls+
Fls-
Frs+
Frs-
Fuse 10 40a
Fuse 10 7.5a
Fuse 7 15a
Fuse 7.5a
Fuse 8 20a
G302 (left side of engine compt)
G501 (under gauge assembly)
Gauge assembly
Ground
Hot at all times
Hot in on
Hot in on or start
Ign input
Left front wheel speed sensor (at left front wheel)
Left rear wheel speed sensor (at left rear wheel)
Multiplex control unit
O12
Right front wheel speed sensor (at right front wheel)
Right rear wheel speed sensor (at right rear wheel)
Rls+
Rls-
Rrs+
Rrs-
Underdash fuse/relay box (under left side of dash)
Underhood fuse/relay box (right side of engine compartment)

Anti-lock Brakes Wiring Diagram, Hatchback for Honda Civic Si 2003

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List of elements for Anti-lock Brakes Wiring Diagram, Hatchback for Honda Civic Si 2003:

A12
Abs indic
Abs indicator circuit
Abs indicator light
Abs modulator control unit (left side of engine compt)
B12
Brake pedal position switch (under left side of dash)
Brake sw in
Brk sys ind
C10
Cruise control system
Data link connector (under left side of dash)
Dlc input
Ebd
Engine control system
Eps control unit
Fls+
Fls-
Frs+
Frs-
Fuse 10 40a
Fuse 10 7.5a
Fuse 11 7.5a
Fuse 7 15a
Fuse 8 20a
G202 (right front of vehicle)
G502 (under right side of dash)
Gauge assembly
Ground
Hot at all times
Hot in on
Hot in on or start
Ign input
Left front wheel sensor (inside wheel)
Left rear wheel sensor (inside wheel)
Multiplex control unit
O12
Right front wheel sensor (inside wheel)
Right rear wheel sensor (inside wheel)
Rls+
Rls-
Rrs+
Rrs-
Underdash fuse/relay box (under left side of dash)
Underhood fuse/relay box (right side of engine compartment)
Underhood fuse/relay box (right side of engine compt)

Anti-lock Brakes Wiring Diagram, Hybrid for Honda Civic Si 2003

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List of elements for Anti-lock Brakes Wiring Diagram, Hybrid for Honda Civic Si 2003:

(abs busy)
(fls+)
(fls-)
(frs+)
(frs-)
(rls+)
(rls-)
(rrs+)
(rrs-)
(under gauge assembly) g501
A17
A22
A27
Abs ind ctrl
Abs indicator
Abs indicator circuit
Abs modulator- control unit (right side of engine compt)
Abs output
B17
Brake pedal position switch (under left side of dash)
Brake switch in
Brake system ind
C10
Computer data lines system
Cpu
Dlc in/out
Ebd
Fail-safe rly pwr
Fuse 15a
Fuse 20a
Fuse 40a
Fuse 7.5a
G202 (behind right side of front bumper)
Gauge assembly
Ground
Hot at all times
Hot in on
Hot in on or start
Ignition input
Left front wheel speed sensor (at left front wheel)
Left rear wheel speed sensor (at left rear wheel)
Mcm (behind glove box)
Multiplex control unit
O12
Pump mtr rly pwr
Right front wheel speed sensor (at right front wheel)
Right rear wheel speed sensor (at right rear wheel)
Service check in
Underdash fuse/relay box (under left side of dash)
Underhood fuse/relay box (on left side of engine compartment)

ANTI-THEFT

Anti-theft Wiring Diagram, Hatchback for Honda Civic Si 2003

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List of elements for Anti-theft Wiring Diagram, Hatchback for Honda Civic Si 2003:

(behind left side of front bumper) high horn
(behind right side of front bumper) low horn
(canada)
(usa)
C11
Canada
Combination light switch
Cruise control system
D11
Dimmer switch
Driver's door switch
Drl control unit (under left side of dash) (canada)
Exterior lights system
F10
F12
Fuse 10a
Fuse 15a
Fuse 2a
Fuse 7.5a
Fuse 80a
G401 (under gauge assembly)
G50 (under left side of dash)
G501 (under gauge assembly)
G502 (under right side of dash)
G552 (behind right rear seat back)
Hatch latch switch
Head- lights relay 1
Head- lights relay 2
Headlights system
High
Horn relay
Horn system
Hot at all times
Hot in on or start
Ignition key switch
Ignition key switch/ key light
Interior lights system
K13
Keyless receiver unit (under middle of dash)
Left headlight
Low
Multiplex control unit
P18
Passenger's door switch
Red
Right headlight
Security control unit (under left side of dash)
Security led
Taillight relay
Underdash fuse/relay box (under left side of dash)
Underhood fuse/relay box (on right side of engine compartment)
Usa

Forced Entry Wiring Diagram, Except Hatchback & Hybrid for Honda Civic Si 2003

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List of elements for Forced Entry Wiring Diagram, Except Hatchback & Hybrid for Honda Civic Si 2003:

(sedan)
Combination light switch
Cruise control system
Driver's door switch
Front passenger's or passenger's door switch
Fuse 10 7.5a
Fuse 15 2a
Fuse 2 15a
Fuse 20 20a
G12 (under left side of dash)
G401 (under gauge assembly)
G502 (under middle of dash)
G601 (at middle of trunk)
Headlight switch
Headlights system
Horns system
Hot at all times
Hot in on or start
Ignition key switch
Ignition key switch/ key light (in steering column cover)
Interior lights system
Keyless receiver fuse 1
Keyless receiver fuse 2
Keyless receiver unit (under middle of dash)
Left rear door switch (sedan)
Multiplex control unit
P18
Red
Right rear door switch (sedan)
Security control unit (under left side of dash)
Security led switch/ key light (in steering column cover)
Taillight relay
Trunk latch switch
Underdash fuse/relay box (under left side of dash)
Underhood fuse/relay box (right side of engine compartment)

Forced Entry Wiring Diagram, Hybrid for Honda Civic Si 2003

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List of elements for Forced Entry Wiring Diagram, Hybrid for Honda Civic Si 2003:

(under gauge assembly) g401
Combination light switch
Driver's door switch
Drl h/l sw
Exterior lights system
Fr door sw (as)
Fr door sw (dr)
Front passenger's door switch
Fuse 10 7.5a
Fuse 15 10a
G50 (under left side of dash)
G502 (behind right side of dash)
G601 (at middle of trunk)
Horns, cruise control systems
Hot at all times
Hot in on or start
Ignition key switch
Ignition key switch/ key light
K/l set
K/l unset
Key sw
Left rear door switch
Multiplex control unit
P18
Red
Right rear door switch
Rr door sw
Security control unit (under left side of dash)
Security led
Trunk latch switch
Trunk light
Trunk sw (t/g sw)
Underdash fuse/relay box (under left side of dash)

Immobilizer Wiring Diagram, Except GX & Hybrid for Honda Civic Si 2003

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List of elements for Immobilizer Wiring Diagram, Except GX & Hybrid for Honda Civic Si 2003:

(except hatchback)
(hatchback)
(hx,lx,ex)
(not used)
A16
A23
A24
B10
B19
B22
C20
Computer data lines system
D11
D12
Data link connector (dlc) (under middle of dash)
E27
Ecm/pcm (behind glove box)
Eps control unit
Except hatchback
Except hx,lx,ex
Fuel pump
Fuel tank unit
Fuse 10a
Fuse 15a
G101 (at top right rear side of engine)
G551 (under front passenger's seat)
Gauge assembly
Hatchback
Hatchback except
Hot at all times
Hot in on or start
Hx,lx,ex
Ig1
Igp1
Igp2
Immobi- lizer code
Immobilizer system indicator
Immoblizer control unit receiver (in steering column cover)
Imo fpr
Imocd
Junction connector c102 (behind glove compt)
Junction connector c104 (on cylinder head cover)
Lg1
Lg2
Lg3
Mrly
Multiplex control unit
P14
Parking brake switch (at base of park lever)
Pgm-fi main relay 1 (behind glove box)
Pgm-fi main relay 2 (behind glove box)
Underdash fuse/relay box (under left side of dash)
Underhood fuse/ relay box (right side of engine compt)

Immobilizer Wiring Diagram, GX for Honda Civic Si 2003

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List of elements for Immobilizer Wiring Diagram, GX for Honda Civic Si 2003:

A16
A23
A24
A3 a3
B10
B22
Computer data lines system
D11
D12
E27
E28
Ecm/pcm (behind glove box)
Engine controls system
Except hx,lx,ex
Fuel pressure regulator switch (right side of engine compt)
Fuel tank internal solenoid valve (left side of trunk)
Fuse 10a
Fuse 15a
G101 (at top right rear side of engine)
G201 (behind right side of front bumper)
G551 (under front passenger's seat)
Gauge assembly
Hot at all times
Hot in on or start
Hx,lx,ex
Ig1
Igp1
Igp2
Immobi- lizer code
Immobilizer control unit receiver (in steering column cover)
Immobilizer system indicator
Imo fpr
Imocd
Injector relay (behind glove box)
Junction connector c102 (behind glove compartment)
Junction connector c104 (on cylinder head cover)
Lg1
Lg2
Lg3
Mrly
Multiplex control unit
P1sw
Parking brake switch (at base of park lever)
Pgm-fi main relay 1 (behind glove box)
Pgm-fi main relay 2 (behind glove box)
Underdash fuse/relay box (under left side of dash)
Underhood fuse/ relay box (right side of engine compt)

Immobilizer Wiring Diagram, Hybrid for Honda Civic Si 2003

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List of elements for Immobilizer Wiring Diagram, Hybrid for Honda Civic Si 2003:

A23
A24
B18
Computer data lines system
Cooling fans system
D11
D12
E27
Ecm (behind glove box)
Engine controls system
Fuel pump
Fuel tank unit (on top of fuel tank)
Fuse 10a
Fuse 15a
G101 (at top left side of engine)
G551 (under front passenger's seat)
Gauge assembly
Hot at all times
Hot in on or start
Ig1
Immobi- lizer cord
Immobilizer control unit-receiver (in steering column cover)
Immobilizer system indicator
Imo fpr
Imocd
Instrument cluster system
Junction connector c111 (on middle of engine)
Lg1
Lg2
Lg3
Mrly
Multi-fuse/ relay box (on left side of engine compartment)
Multiplex control unit
Pgm-fi main relay 1 (behind glove box)
Pgm-fi main relay 2
Underdash fuse/relay box (under left side of dash)
Underhood fuse/ relay box (on left side of engine compartment)

BODY CONTROL MODULES

Body Control Modules Wiring Diagram, Except Hatchback & Hybrid for Honda Civic Si 2003

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List of elements for Body Control Modules Wiring Diagram, Except Hatchback & Hybrid for Honda Civic Si 2003:

(behind left side of front bumper) g301
(canada)
(except
(hx,lx,ex)
(not used)
(under gauge assembly) g501
(usa)
+b back up
A/c pressure switch
Abs modulator- control unit (left side of engine compt)
Acc
Air conditioning system
Anti-theft system
Atp -p
B+ day lt
Brake level switch
Bus
C11
Ceiling light
Commu- nication
Coupe dx, hx
D10
D11
D14
Dimmer high
Door locks system
Dr door lck remote in
Dr door lock input
Dr door unlk remote in
Dr door unlock input
Driver door switch
Driver seat belt/srs
Drl h/l sw
E10
E13
E24
Ebd
Ecm/pcm (behind glove box)
Exterior lights system
Exterior lights, cruise control systems
Exterior lights, warning systems
F10
F11
F12
Fr washer motor
Fr wiper (int vol +)
Fr wiper (int vol -)
Fr wiper intermittent
Fr wiper pass
Fuse 10a
Fuse 16 (underhood)
Fuse 20a
Fuse 7.5a
G201 (behind right side of front bumper)
G401 (under gauge assembly)
G502 (under middle of dash)
Gauge assembly
Ground
Headlights high
Headlights low
Headlights system
Horn switch
Horns system
Hot at all times
Hot in acc or on
Hot in on
Hot in on or start
Hx,lx,ex)
Ig1
Ig1 wiper
Ign 2 day lt
Ignition key light
Ignition key lt
Ignition key switch
Ignition key switch/ key light
Illuminaton
Immobi code
Instrument cluster system
Interior lights system
Interior lights, door locks, anti-theft systems
K10
K16
Key in ignition
Key solenoid output
Key switch input
Keyless receiver unit
Lighting relay
Lock
Mist wiper input
Mpcs chk
Multiplex control sys
Multiplex control unit
Multiplex control unit service check connector
P16
P17
P18
Park pin/shift switch
Passenger door switch
Pcm
Rear door switches
Red
Security alarm system
Sefms
Shift interlock system
Shift lock solenoid
Small lt relay
Sound systems
Stop light
Trunk latch switch
Trunk, tailgate, fuel doors system
Underdash fuse/relay box (under left side of dash)
Underhood fuse/relay box (right side of engine compt)
Unlock
W/ abs
W/o abs
Warning, door locks, anti-theft systems
Wiper/washer system
Y10
Y11
Y12
Y13

Body Control Modules Wiring Diagram, Hatchback for Honda Civic Si 2003

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List of elements for Body Control Modules Wiring Diagram, Hatchback for Honda Civic Si 2003:

(canada)
(not used)
(right front of vehicle) g201
(usa)
A/c pressure switch
Air conditioning system
Anti-lock brakes system
Anti-theft system
B+ day lt
B13
Beeper
Brake switch
C11
Ceiling light
D10
D11
D14
Dimmer high
Door lock actuator
Door locks
Door locks system
Dr door lck remote in
Dr door lock input
Dr door unlk remote in
Dr door unlock input
Driver door switch
Driver seat belt/srs
E10
E13
E24
Ebd
Ecm/pcm (behind glove box)
Exterior & interior lights systems
Exterior lights & cruise control systems
F10
F11
F12
Fr washer motor
Fr wiper pass
Fuse 10a
Fuse 16 (underhood)
Fuse 20a
Fuse 30a
Fuse 7.5a
Fuse 9 (underhood)
G502 (right side of dash)
Gauge assembly
Ground
Headlights high
Headlights low
Headlights system
Horn relay
Horns system
Horns systems
Hot at all times
Hot in on
Hot in on or acc
Hot in on or start
Ign 2 day lt
Ignition key input
Ignition key light
Ignition key switch/ key light
Illuminaton
Immobilizer
Interior lights system
Interior lights, door locks & anti-theft systems
K10
K16
Key solenoid output
Key switch input
Keyless receiver unit
Mist wiper input
Mpcs chk
Multiplex bus
Multiplex control unit
Multiplex control unit service check connector
P16
P17
P18
Park pin/shift switch
Passenger door switch
Pcm
Rear dr lck actuators
Red
Security alarm system
Shift interlock system
Shift lock solenoid
Small lt relay
Stop light
Transmission range sw
Trunk latch switch
Trunk, tailgate, fuel doors system
Underdash fuse/relay box
Underdash fuse/relay box (under left side of dash)
Underhood fuse/relay box (right side of engine compt)
Warning systems
Warning systems warning systems
Warning systems, exterior lights system
Warning, door locks & anti-theft systems
Wiper intermittent input
Wiper/washer system
Y10
Y11
Y12
Y13

Body Control Modules Wiring Diagram, Hybrid for Honda Civic Si 2003

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List of elements for Body Control Modules Wiring Diagram, Hybrid for Honda Civic Si 2003:

(canada)
(meter) bus
(not used)
(usa)
+b back up
+b door lock
, instrument cluster system
A2 commu- nication
Abs modulator- control unit (right side of engine compartment)
Acc
Anti-theft system
Atp-p
B+ day lt
Beeper
Brake level sw
Bus (ecu)
C11
Cruise control, horns systems
D/l dr mtr (unlock)
D/l mtr (lock)
D/l remote sw (lock)
D/l remote sw (unlock)
D/l sil-con sw (lock)
D10
D11
D14
Dimmer high
Door lock actuator
Door locks system
Door locks, anti-theft, interior lights systems
Dr belt sw
Driver door switch
Drl h/l sw
E10
E13
Ebd
Exterior lights, cruise control, anti-lock brakes systems
Exterior lights, interior lights systems
F10
F11
F12
Fr door sw (as)
Fr washer mtr
Fr wiper (as)
Fr wiper (int)
Fr wiper int unit
Fr wiper int vol +
Fr wiper int vol -
Fuse 10a
Fuse 20a
Fuse 7.5a
G301 (behind left side of front bumper)
G401 (under gauge assembly)
G501 (under gauge assembly)
Gauge assembly
Gnd
Ground
H/l hi
H/l low
Headlights system
Headlights, anti-theft systems
Horn sw
Horns system
Hot at all times
Hot in acc or on
Hot in on
Hot in on or start
Ig key lt-
Ig1 meter
Ig1 wiper
Ig2 day lt
Ignition key light
Ignition key switch
Ignition key switch/ key light (in steering column cover)
Illuminaton +
Ilu
Immobi cord
Interior lights system
Interior lights, anti-theft systems
Intr lt-
K/l set
K/l unset
K10
K16
Key lock sol +
Key sw
Keyless com
Lighting rly-
Mpcs chk
Multiplex control unit
Multiplex control unit service check connector
P pin sw
P16
P17
P18
Rear door switches
Rear dr lck actuators
Red
Security control unit connector (optional)
Shift interlock system
Shift lock sol
Small lt rly-
Sound systems
Stop light
Transmission control module (cvt) (behind right kick panel)
Trunk sw (t/g sw)
Underdash fuse/relay box (under left side of dash)
Underhood fuse/relay box (on left side of engine compt)
Warning system
Wiper/washer system
Y10
Y11
Y12
Y13

COMPUTER DATA LINES

Computer Data Lines Wiring Diagram, Except Hatchback & Hybrid for Honda Civic Si 2003

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List of elements for Computer Data Lines Wiring Diagram, Except Hatchback & Hybrid for Honda Civic Si 2003:

(behind left side of front bumper)
(diag-h)
(k-line)
(lg3)
(mes)
(nep)
(not used) i4
(scs)
(under front passenger's seat)
(under left side of dash) mes connector
(wen)
A13
Abs modulator- control unit (left side of engine compartment)
D11
Dlc (under middle of dash)
E12
E23
E26
E29
E30
Ecm/pcm (behind glove box)
Fuse 10a
G301
G451 (under middle of dash)
G551
Gauge assembly
Gx cvt, dx
Hot at all times
Hx, lx, ex
Immobilizer control unit receiver (in steering column cover)
Injector control (gx) (under front passenger's seat)
Module
Mpcs chk
Multiplex control unit
Multiplex control unit service check connector
P14
Secondary ho2s shield (ex,hx)
Srs unit (under middle of dash)
Test tachometer connector (right side of engine compt)
Underdash fuse/relay box (under left side of dash)
Underhood fuse/relay box (right side of engine compt)

Computer Data Lines Wiring Diagram, Hatchback for Honda Civic Si 2003

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List of elements for Computer Data Lines Wiring Diagram, Hatchback for Honda Civic Si 2003:

(k-line)
(not used) i4
(scs)
(under middle of dash) g451
(wen)
Abs modulator control unit (ex & gx) (left side of engine compartment)
Braided wire
C20
D11
Data link connector (dlc) (under middle of dash)
E12
E23
E29
E30
Engine control module (ecm) (behind glove box)
Eps control unit (under right side of dash)
Fuse 9 10a
Hot at all times
Immobilizer control unit receiver (in steering column cover)
P14
Secondary ho2s shields
Sensor gnd
Srs unit (under middle of dash)
Underdash fuse/relay box (under left side of dash)
Underhood fuse/relay box (right side of engine compartment)

Computer Data Lines Wiring Diagram, Hybrid for Honda Civic Si 2003

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List of elements for Computer Data Lines Wiring Diagram, Hybrid for Honda Civic Si 2003:

(diag-h)
(dlc)
(k-line)
(lg3)
(mes)
(nep)
(scs)
(under front passenger's seat) g551
(under left side of dash) underdash fuse/relay box
(under middle of dash) g504
(vbu)
(wen)
A13
A17
A25
A28
A30
A31
Abs modulator- control unit (right side of engine compt)
Braided wire
C19
C20
D11
Data link connector (under middle of dash)
E12
E23
E26
E29
E30
Ecm (behind glove box)
Eps control unit (under right side of dash)
Fuse 9 10a
G301 (behind left side of front bumper)
Gauge assembly
Hot at all times
Immobilizer control unit- receiver (in steering column cover)
Mcm (behind glove box)
Mes connector (under left side of dash)
Multiplex control unit
Multiplex control unit service check connector
P14
Srs unit (under middle of dash)
Test tachometer connector (left side of engine compt)
Third ho2s shield
Transmission control module (cvt) (behind right kick panel)
Underhood fuse/relay box (on left side of engine compartment)

COOLING FAN

Cooling Fan Wiring Diagram, Except Hatchback & Hybrid for Honda Civic Si 2003

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List of elements for Cooling Fan Wiring Diagram, Except Hatchback & Hybrid for Honda Civic Si 2003:

(at left front side of engine compartment)
(not used)
A/c compressor
A/c condenser fan motor (forward of radiator)
A/c on
A/c pressure switch (behind left side of a/c condenser fan motor)
A10
Accessory a/c
Acs
Condenser fan relay
Connector c102 (except gx: terminals 5-7) (gx: terminals' 14-16) (behind glove compartment)
E10
E24
Ecm/pcm (behind glove box)
Ect sensor (rear of engine)
Except gx
Factory a/c
Fanc
Fuse 10a
Fuse 20a
G101 (at top right rear side of engine)
G13
G201 (behind right side of front bumper)
Heater control panel
High
Hot at all times
Hot in on
Junction
Junction connector c103 (on cylinder head cover)
Low
Multiplex control unit
Radiator fan motor (behind radiator)
Radiator fan relay
Radiator fan switch (right rear of engine)
Red
Sedan
Sefmj
Sens gnd
Sens input
Thermal protector
Under-dash fuse/relay box (under left side of dash)
Under-hood fuse/relay box (right side of engine compt)

Cooling Fan Wiring Diagram, Hatchback for Honda Civic Si 2003

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List of elements for Cooling Fan Wiring Diagram, Hatchback for Honda Civic Si 2003:

(left front of vehicle) g301
A/c clutch
A/c compressor
A/c compressor clutch
A/c compressor clutch relay
A/c compressor thermal protector
A/c condenser fan motor (forward of radiator)
A/c on
A/c pressure switch (behind left side of a/c condenser fan)
Acc
Acs
Condenser fan relay
D10
E10
E18
E24
Ecm/pcm (behind glove box)
Fuse 10a
Fuse 20a
G301 (left front of vehicle)
Heater control panel
High
Hot at all times
Hot in on
J/c c103 (on cylinder head cover)
Low
Nca
Radiator fan motor (behind radiator)
Radiator fan relay
Radiator fan switch (middle of engine)
Red
Sefmj
Underdash fuse/relay box (under left side of dash)
Underhood fuse/relay box (right side of engine compt)

Cooling Fan Wiring Diagram, Hybrid for Honda Civic Si 2003

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List of elements for Cooling Fan Wiring Diagram, Hybrid for Honda Civic Si 2003:

(ect) sens input
(fanc) fan ctrl
(hrfanc) fan ctrl
(mrly) relay ctrl
(rear of
(sg2) sens gnd
A/c compressor
A/c condenser fan motor (forward of radiator)
A/c condenser fan relay
A/c pressure switch (behind left side of a/c condenser fan motor)
A10
A6 a/c pres sw
Auxiliary fuse holder
Climate control unit
E11
E28
Engine control module (behind glove box)
Engine controls system
Engine coolant
Engine)
Fuse 10a
Fuse 15a
Fuse 20a
Fuse 7.5a
G201 (behind right side of front bumper)
High
Hot at all times
Hot in on
Hot restart fan relay
Junction connector c106 (behind glove box)
Low
M m
Multi-fuse/ relay box (on left side of engine compt)
Pgm-fi main relay 1 (behind glove box)
Pgm-fi main relay 2
Radiator fan motor (behind radiator)
Radiator fan relay
Radiator fan switch (bottom front of engine compt)
Red
Sensor
Temperature
Thermal protector
Underdash fuse/ relay box (under left side of dash)
Underhood fuse/relay box (on left side of engine compt)

CRUISE CONTROL

Cruise Control Wiring Diagram, Except Hatchback & Hybrid for Honda Civic Si 2003

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List of elements for Cruise Control Wiring Diagram, Except Hatchback & Hybrid for Honda Civic Si 2003:

"on" indicator
(at)
(behind left side of front bumper) g301
(clh)
(clp)
(gnd)
(ig)
(inh)
(mc)
(mo)
(not used)
(res)
(right side of engine compt)
(set)
(spd)
(under left side of dash) brake pedal position switch
A/t
A/t except cvt
A/t except cvt, cvt
A14
A15
A17
A18
A21
C18
Cable reel
Cancel switch
Clutch pedal position switch (under left side of dash)
Coupe lx, ex
Cruise control actuator (coupe lx, ex)
Cruise control actuator (usa hx & sedan lx, ex, gx) (right side of of engine compt)
Cruise control main switch
Cruise control set/resume cancel switch
Cruise control switch light
Cruise control unit (usa hx & sedan lx, ex, gx) (under left side of dash)
Cruise indicator
Cvt
E12
E25
Ecm/pcm (behind glove box)
Except cvt
Except hx, lx, ex
Exterior lights system
Fuse 10a
Fuse 15a
Fuse 7.5a
G101 (middle of engine)
G301 (coupe lx, ex) (behind left side of front bumper)
G401 (under gauge assembly)
G501 (under gauge assembly)
G501 (usa hx & sedan lx, ex, gx) (under gauge assembly)
Gauge assembly
Horn relay
Horns system
Hot at all times
Hot in on or start
Hx, lx, ex
Interior lights system
Junction connector c102 (behind glove box)
Junction connector c103 (on cylinder head cover)
M/t
Multiplex control unit
O11
O12
Off
On input
Pcm
Pnk
Red
Resume switch
Security control unit connector (optional) (under left side of dash)
Set switch
Steering wheel
Transmission range switch (transmission housing)
Underdash fuse/relay box (behind left side of dash)
Underhood fuse/relay box (right side of engine compt)
Usa hx & sedan lx, ex, gx
Vss (transmission housing)

Cruise Control Wiring Diagram, Hatchback for Honda Civic Si 2003

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List of elements for Cruise Control Wiring Diagram, Hatchback for Honda Civic Si 2003:

"on" indicator
(behind left side of front bumper) g301
(clh)
(clp)
(gnd)
(ig)
(inh)
(mc)
(mo)
(res)
(set)
(spd)
(under left side of dash) brake pedal position switch
B22
Cable reel
Clutch pedal position switch (under left side of dash)
Cruise control actuator (right side of engine compt)
Cruise control main switch
Cruise control main switch light
Cruise control set/resume cancel switch
Cruise control unit (under left side of dash)
Cruise indicator
Exterior lights system
Fuse 10a
Fuse 15a
Fuse 7.5a
G501 (under gauge assembly)
Horn relay
Horns system
Hot at all times
Hot in on or start
Instrument cluster
Interior lights system
J/c c102 (behind glove box)
Multiplex control unit
O11
O12
Off
On input
Red
Security control unit connector (under left side of dash)
Steering wheel
Underdash fuse/relay box (behind left side of dash)
Underhood fuse/relay box (right side of engine compt)
Vss (transmission housing)

Cruise Control Wiring Diagram, Hybrid for Honda Civic Si 2003

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List of elements for Cruise Control Wiring Diagram, Hybrid for Honda Civic Si 2003:

"on" indicator
(behind left side of front bumper) g301
(not used)
(under gauge assembly) g501
(under left side of dash) brake pedal position switch
A/t communication
A14
A18
A27
Act clutch
Atp fwd
B17
B22
Cable reel
Cancel
Climate control unit
Clutch pedal position switch (under left side of dash)
Cpu
Cruise control actuator (right side of engine compt)
Cruise control indicator
Cruise control main switch
Cruise control set/resume/ cancel switch
Cruise control switch light
Cruise control unit (under left side of dash)
Cruise ctrl sig in
Cruise ind ctrl
Cruise on in
Cvt
Ecm (behind glove box)
Eps control unit (under right side of dash)
Fuse 10a
Fuse 15a
Fuse 7.5a
G101 (at top left side of engine)
G401 (under gauge assembly)
Gauge assembly
Ground
Horn relay
Horn sw
Horn switch
Hot at all times
Hot in on or start
Ignition input
Inhibitor sw in
Interior lights system
Joint)
Junction connector c106 (behind glove box)
Junction connector c111 (on middle of engine)
K9 (not used)
M/t
Motor close
Motor open
Multiplex control unit
O11
O12
Off
Red
Resume
Resume sw in
Security control
Set
Set sw input
Speed sens in
Steering wheel
Transmission control module (behind right kick panel)
Transmission range switch (on transaxle housing)
Underdash fuse/relay box (under left side of dash)
Underhood fuse/relay box (on left side of engine compt)
Unit connector (optional)
Vehicle speed sensor (on transaxle housing)
Vss
Vss out

DEFOGGERS

Heated Mirrors Wiring Diagram, Except Hatchback & Hybrid for Honda Civic Si 2003

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List of elements for Heated Mirrors Wiring Diagram, Except Hatchback & Hybrid for Honda Civic Si 2003:

Defogger
Defogger switch
Fuse 14 10a
G501 (under gauge assembly)
G502 (under middle of dash)
Hot in on
Left power mirror
Power mirror switch
Right power mirror
Underdash fuse/relay box (under left side of dash)

Heated Mirrors Wiring Diagram, Hatchback for Honda Civic Si 2003

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List of elements for Heated Mirrors Wiring Diagram, Hatchback for Honda Civic Si 2003:

(under gauge assembly) g501
(under right side of dash) g502
Defogger
Defogger switch
Fuse 14 10a
Hot in on
Left power mirror
Power mirror switch
Right power mirror
Underdash fuse/relay box (under left side of dash)

Heated Mirrors Wiring Diagram, Hybrid for Honda Civic Si 2003

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List of elements for Heated Mirrors Wiring Diagram, Hybrid for Honda Civic Si 2003:

(behind right side of dash) g502
(under gauge assembly) g501
Defogger
Defogger switch
Fuse 14 10a
Hot in on
Left power mirror
Power mirror switch
Right power mirror
Underdash fuse/relay box (under left side of dash)

Rear Defogger Wiring Diagram, Coupe for Honda Civic Si 2003

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List of elements for Rear Defogger Wiring Diagram, Coupe for Honda Civic Si 2003:

(not used)
A12
A13
A14
Antenna lead
Antenna module (inside
Audio unit
Coil assembly
Fuse 11 40a
Fuse 14 10a
G502 (under middle of dash)
G701 (at left "c" pillar)
Ground
Heater control panel
Hot at all times
Hot in on
Ignition input
Nca
Rear window defogger (fm antenna)
Rear window defogger relay
Rear window defogger relay cntrl
Right "c" pillar)
Sub- antenna lead
Underdash fuse/relay box (under left side of dash)
Underhood fuse/relay box (right side of engine compartment)
Window antenna (am)

Rear Defogger Wiring Diagram, Hatchback for Honda Civic Si 2003

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List of elements for Rear Defogger Wiring Diagram, Hatchback for Honda Civic Si 2003:

(not used)
A12
A13
A14
Air cond- itioning system
B14
B21
Fuse 11 30a
Fuse 14 10a
G501 (under gauge assembly)
G552 (behind right rear seat back)
Ground
Heater control unit panel
Hot at all times
Hot in on
Ign
Ignition input
Rear defog led cntrl
Rear defog on input
Rear window defogger
Rear window defogger noise condenser
Rear window defogger relay
Rear window defogger relay cntrl
Recir-a/c rear defogger switch assembly
Underdash fuse/relay box (under left side of dash)
Underhood fuse/relay box (right side of engine compartment)

Rear Defogger Wiring Diagram, Hybrid for Honda Civic Si 2003

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List of elements for Rear Defogger Wiring Diagram, Hybrid for Honda Civic Si 2003:

(behind right side of dash) g502
(not used)
A10
A18 rear window defogger sw
A19 rear window defog sw led
A20
A5 rear window defogger sw
Climate control unit
Fuse 11 30a
Fuse 14 10a
G701 (at left side of rear shelf)
Ground
Hot at all times
Hot in on
Ig2 (power)
Indicator
Interior lights system
Rear window defogger
Rear window defogger relay
Rear window defogger switch
Rear window defogger switch light
Red
Timer circuit
Underdash fuse/relay box (under left side of dash)
Underhood fuse/relay box (on left side of engine compartment)

Rear Defogger Wiring Diagram, Sedan for Honda Civic Si 2003

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List of elements for Rear Defogger Wiring Diagram, Sedan for Honda Civic Si 2003:

(not
A12
A13
A14
Fuse 11 30a
Fuse 14 10a
G502 (under middle of dash)
Ground
Heater control panel
Hot at all times
Hot in on
Ignition input
Rear window defogger
Rear window defogger relay
Rear window defogger relay cntrl
Underdash fuse/relay box (under left side of dash)
Underhood fuse/relay box (right side of engine compartment)
Used)
Window antenna coil

ELECTRONIC POWER STEERING

Electronic Power Steering Wiring Diagram, Hatchback for Honda Civic Si 2003

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List of elements for Electronic Power Steering Wiring Diagram, Hatchback for Honda Civic Si 2003:

(not used)
(under left side of dash)
+bat
A13
A18
C10
C11
C12
C13
C14
C15
C16
C17
C18
C19
C20
Computer data lines system
Cruise control unit (under left side of dash)
D11
Diag-h
Driving circuit (vss out)
E16
E26
Engine control module (ecm) (behind glove box)
Eps control unit (under right side of dash)
Eps indicator
Eps motor (rear of engine compt)
Eps torque sensor (left side of engine compt)
Epsld
Fuse 10 7.5a
Fuse 18 60a
G151 (under right side of dash)
Gauge assembly
Hot at all times
Hot in on or start
Ig1
Nep
O11
Pnk
Psw
Red
Scs
Side of dash)
T/s gnd
T/sig
Tachometer test connector (right side of engine compt)
Underdash fuse/relay box
Underdash fuse/relay box (under left
Underdash fuse/relay box (under left side of dash)
Underhood fuse box (right side of engine compt)
Vcc1
Vcc2
Vsp
Vss
Vss (on trans- axle housing)
Vt3
Vt6
Wlp

Electronic Power Steering Wiring Diagram, Hybrid for Honda Civic Si 2003

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List of elements for Electronic Power Steering Wiring Diagram, Hybrid for Honda Civic Si 2003:

(under left
(under left side of dash)
+bat
A19
A28
Air conditioning system
B10
B12
B13
B17
B20
C10
C11
C12
C13
C14
C15
C16
C17
C18
C19
C20
Clutch interlock switch
Computer data lines system
Cpu
Cvt
Cvt: atp np, m/t: cl sw
D10
D11
Diag-h
E26
Engine control module (ecm) (behind glove box)
Eps control unit (under right side of dash)
Eps indicator
Eps motor (middle of engine compt)
Eps torque sensor (rear center of engine compt)
Fuse 10 7.5a
Fuse 18 60a
G101 (at top left side of engine)
G151 (under middle of dash)
G401 (under gauge assembly)
Gauge assembly
Glove box)
Hot at all times
Hot in on or start
Housing)
Ig1
Junction connector c106 (behind
Junction connector c111 (on middle of engine)
M/t
Multiplex control unit
Nep
Neutral position switch (on transaxle
Pnk
Psw
Red
Scs
Side of dash)
T/s gnd
T/sig
T5 (thermal joint)
Tcm (cvt) (behind right kick panel)
Test tachometer connector (left side of engine compt)
Transmission range switch (on transaxle housing)
Underdash fuse/relay box
Underdash fuse/relay box (under left
Underdash fuse/relay box (under left side of dash)
Underhood fuse/relay box (on left side of engine compartment)
Vcc1
Vcc2
Vsp
Vt3
Vt6
Wlp

ENGINE PERFORMANCE

IMA Wiring Diagram (1 of 3) for Honda Civic Si 2003

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List of elements for IMA Wiring Diagram (1 of 3) for Honda Civic Si 2003:

(at middle of trunk) g601
(behind glove box) mcm relay 1
(behind glove box) mcm relay 2
(m/t)
(top left side of engine) g101
(under front passenger seat) g551
(under gauge assembly) g501
(under mpi) j/c c801
A10
A11
A12
A13
A14
A15
A16
A17
A18
A19
A20
A21
A22
A23
A24
A25
A26
A27
A28
A29
A30
A31
Abs system
Absbusy
B10
B11
B12
B13
B14
B15
B16
B17
B18
B19
B20
B21
B22
B23
B24
Battery current sensor (behind right side of dash)
Box
Braided
Charge ind
Cma
Cmb
Cmc
Cnt
Computer data lines system
Cylout
D11
Dimming circuit
Dvct
Dvinh
Fanctl
Fuse 10a
Fuse 7.5a
G101
G601
Gauge assembly
Hot at all times
Hot in on or start
Ig1
Iga1
Iga2
Ighld
Ighld2
Ima ind
Ima sys
Ipu a
Ipu fan module (right side of trunk)
Ipua
Isoc
J/c c801 (under mpi)
K-line
Lg1
Lg2
Mcm
Mota
Motb
Mpi module (behind right side of dash)
Nca
Nfan
Pg1
Pg2
Pnk
Pre
Pwr +
Pwr -
Red
Rscd
Scs
Sgcma
Sgcmb
Sgcmc
Under- dash fuse/ relay
Under- hood fuse/ relay
Vbu
Vcccma
Vcccmb
Vcccmc
Warn
Wen

IMA Wiring Diagram (2 of 3) for Honda Civic Si 2003

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List of elements for IMA Wiring Diagram (2 of 3) for Honda Civic Si 2003:

(left rear side of passenger floor) g651
(m/t)
(top left side of engine) g101
+ termianl
- termianl
Box
Braided
Bypass contractor
Bypass resistor (left side of battery module)
C13
C15
C21
Capacitors
Cvt
Cylout
Dc-dc converter
Dvc
E13
E16
E17
Ecm (behind glove box)
Fuse 10a
Fuse 80a
High voltage contractor
Hot at all times
Hot in on or start
J/c c106 (behind glove box)
J/c c801 (under mpi)
M/t
Mota
Motb
Motor communication sensor (middle of engine compt)
Mpi module
Nca
Passenger seat) g551
Pdu
Pnk
Red
Rscd
Rscdc
Sensor a
Sensor b
Sensor c
Snubber unit
T101
Transmission control module (behind right kick panel)
Under- dash fuse/ relay
Under- hood fuse/ relay

IMA Wiring Diagram (3 of 3) for Honda Civic Si 2003

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List of elements for IMA Wiring Diagram (3 of 3) for Honda Civic Si 2003:

(behind right side of dash) mpi module current sensor
(behind right side of dash) u phase motor current sensor
(behind right side of dash) v phase motor current sensor
(behind right side of dash) w phase motor current sensor
Battery module (behind right side of dash)
Battery module fuse 100a
Battery module switch
C10
C11
C12
C13
C14
C15
C16
C17
Dc-dc con- verter
Dc-dc converter fuse 20a
E10
E11
E12
E13
E14
E15
E16
E17
E18
E19
E20
E21
E22
F10
F11
F12
F13
F14
Ipin
Iuph
Ivph
Mcm
Motor stator
Mpi module
Nca
Pdu
Ptc +
Ptc -
Red
Sgdv
Sgip
Sgiu
Sgiv
Sgiw
Sgtb
Tbatt1
Tbatt2
Tbatt3
Tdv
Vccip
Vcciu
Vcciv
Vcciw
Vhb0
Vhb1
Vhb10
Vhb11
Vhb2
Vhb3
Vhb4
Vhb5
Vhb6
Vhb7
Vhb8
Vhb9
Wph
Y capacitor

1.3L

1.3L, Engine Performance Wiring Diagram, A/T (1 of 4) for Honda Civic Si 2003

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List of elements for 1.3L, Engine Performance Wiring Diagram, A/T (1 of 4) for Honda Civic Si 2003:

(behind glove box) j/c c106
(behind glove box) pgm-fi main relay 1
(in multi-fuse/relay box) pgm-fi main relay 2
(top left side of eng) g101
A/c, cooling fans systems
A10
A11
A12
A13
A14
A15
A16
A17
A18
A19
A20
A21
A22
A23
A24
A25
A26
A27
A28
A29
A30
A31
Afs (+)
Afs (-)
Afshtc (-)
Afshtc +
Atpd
Atpnp
Atpr
B10
B11
B12
B13
B14
B15
B16
B17
B18
B19
B20
B21
B22
B23
B24
Box
Ckp
Ckp sensor (on front of eng)
Cmp sensor (top rear of eng)
Cooling fans system
Ecm (behind glove box)
Ect
Egr
Egr valve & egr valve position sensor (top rear of eng)
Egrp
Exterior lights system
Fanc
Front ignition coils
Fuel injectors
Fuel pump
Fuel tank unit
Fuse 15a
G101 (top left side of eng)
G551 (under front passenger's seat)
Hot at all times
Hot in on or start under- dash fuse/ relay box
Iac valve (left rear of eng)
Iacv
Iat
Icm
Igp1
Igp2
Igpls1
Igpls1e
Igpls2
Igpls2e
Igpls3
Igpls3e
Igpls4
Igpls4e
Inj1
Inj2
Inj3
Inj4
J/c c110 (middle of engine)
J/c c111
J/c c111 (middle oe engine)
J/c c111 (middle of engine)
Lg1
Lg2
Map
Pg1
Pg2
Pnk
Red
Rvssw
Sg1
Sg2
Sho2s
So2shtc
Tdc
Tma
Tmb
Tps
Transmission control module (behind right kick panel)
Under- hood fuse/ relay
Vbu
Vcc1
Vcc2
Vss
Vtec solenoid valve (left rear of engine)
Vts

1.3L, Engine Performance Wiring Diagram, A/T (2 of 4) for Honda Civic Si 2003

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List of elements for 1.3L, Engine Performance Wiring Diagram, A/T (2 of 4) for Honda Civic Si 2003:

(behind glove box) a/f sensor relay
(behind glove box) j/c c106
(middle of eng) a/f sensor
(middle of eng) evap canister purge valve
(under left side of floor) evap by-pass solenoid valve
(under right side of floor) evap canister vent shut valve
A/f diode
Box
Braided wire
Ect sensor (rear of eng)
Eld unit
Fuse 10a
Fuse 20a
G101 (top left side of eng)
G301 (behind left side of front bumper)
Hot in on or start
Iat sensor (middle of engine)
Ima circuit
J/c c111 (middle of engine)
J/c c106 (behind glove box)
J/c c110 (middle of engine)
J/c c111 (middle of engine)
Knock sensor (left side of eng block)
Map sensor (left side of eng compt)
Pnk
Power distribution system
Red
Secondary ho2s (middle of eng)
Third ho2s (left side of eng compt)
Tp sensor (on throttle body)
Under- dash fuse/ relay
Under- dash fuse/ relay box
Under- hood fuse/ relay box

1.3L, Engine Performance Wiring Diagram, A/T (3 of 4) for Honda Civic Si 2003

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List of elements for 1.3L, Engine Performance Wiring Diagram, A/T (3 of 4) for Honda Civic Si 2003:

(top left side of eng) g101
(under gauge assembly) g501
7.5a
A/c system
A15
A16
A17
A18
A19
A28
Atp d
Atp l
Atp np
Atp r
Atp s
B10
B17
B20
Box
C10
C11
C13
C14
Cvt speed sensor 2 (on transaxle housing)
D10
Dimming circuit
Driver
Ect
Electronic power steering & instrument cluster systems
Electronic power steering system
Gauge assembly
Hot in on or start
Iat
J/c c109 (middle of eng)
J/c c109 (middle of engine)
Map (pb)
Mil ind
Multiplex control unit
Nep
Pnk
Red
Rscd
Tps
Transmission control module (behind right kick panel)
Transmission range switch (on transaxle housing)
Under- dash fuse/ relay
Vel2
Vref

1.3L, Engine Performance Wiring Diagram, A/T (4 of 4) for Honda Civic Si 2003

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List of elements for 1.3L, Engine Performance Wiring Diagram, A/T (4 of 4) for Honda Civic Si 2003:

(under left sid eof dash) idle stop switch
(under left side of dash) brake pedal position switch
2wbs
A/c system
Acc
Acs
Afshtcr
Anti- theft system
Anti-theft system
Bksw
Box
Brake booster pressure sensor (left side of engine compt)
C10
C11
C12
C13
C14
C15
C16
C17
C18
C19
C20
C21
C22
Cooling fans system
Dlc (under middle of dash)
Dvc
E10
E11
E12
E13
E14
E15
E16
E17
E18
E19
E20
E21
E22
E23
E24
E25
E26
E27
E28
E29
E30
E31
Ecm (behind glove box)
Eld
Engrdy
Eop sensor (top left rear of engine)
Eot sensor (near oil filter)
Ftp
Fuel tank pressure sensor (under left side of floor)
Fuse 15a
G101 (top left side of eng)
G501 (under gauge assembly)
Hot at all times
Hot in on or start
Hrfanc
Htrs
Icm
Idssw
Ig1
Igrtne
Igrtni
Ima circuit
Imo fpr
Imocd
J/c c110
K-line
Lg3
M/p mon
Mil
Mota
Motb
Mrly
Nep
P12
Pnk
Poil
Rear ignition coils
Red
Rscd
Scs
Sg3
Starting/ charging system
Stc
Sts
Tho2s
To2shtc
Toil
Transmissions system
Under- dash fuse/ relay
Under- hood fuse/ relay
Vcc3
Vref
Vsv
Wen

1.3L, Engine Performance Wiring Diagram, M/T (1 of 3) for Honda Civic Si 2003

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List of elements for 1.3L, Engine Performance Wiring Diagram, M/T (1 of 3) for Honda Civic Si 2003:

(behind glove box) j/c c106
(behind glove box) pgm-fi main relay 1
(in multi-fuse/relay box) pgm-fi main relay 2
(top left side of eng) g101
A/c, cooling fans systems
A10
A11
A12
A13
A14
A15
A16
A17
A18
A19
A20
A21
A22
A23
A24
A25
A26
A27
A28
A29
A30
A31
Afs (+)
Afs (-)
Afshtc (-)
Afshtc +
Altf
B10
B11
B12
B13
B14
B15
B16
B17
B18
B19
B20
B21
B22
B23
B24
Box
Ckp
Ckp sensor (on front of eng)
Clutch interlock switch (left side of dash)
Cmp sensor (top rear of eng)
Cooling fans system
Ecm (behind glove box)
Ect
Egr
Egr valve & egr valve position sensor (top rear of eng)
Egrp
Electonic power steering system
Exterior lights system
Fanc
Front ignition coils
Fuel injectors
Fuel pump
Fuel tank unit
Fuse 15a
G101
G101 (top left side of eng)
G401 (under gauge assembly)
G551 (under front passenger's seat)
Hot at all times
Hot in on or start under- dash fuse/ relay box
Iac valve (left rear of eng)
Iacv
Iat
Icm
Igp1
Igp2
Igpls1
Igpls1e
Igpls2
Igpls2e
Igpls3
Igpls4
Igpls4e
Inj1
Inj2
Inj3
Inj4
J/c c110 (middle of engine)
J/c c111 (middle oe engine)
J/c c111 (middle of engine)
Lg1
Lg2
Map
Neutral position switch (on transaxle housing)
Ntsw
Pg1
Pg2
Red
Rvssw
Sg1
Sg2
Sho2s
So2shtc
Tdc
Tps
Under- hood fuse/ relay
Vbu
Vcc1
Vcc2
Vss
Vtec solenoid valve (middle of eng)
Vts

1.3L, Engine Performance Wiring Diagram, M/T (2 of 3) for Honda Civic Si 2003

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List of elements for 1.3L, Engine Performance Wiring Diagram, M/T (2 of 3) for Honda Civic Si 2003:

(behind glove box) a/f sensor relay
(middle of eng) a/f sensor
(middle of eng) evap canister purge valve
(under left side of floor) evap by-pass solenoid valve
(under right side of floor) evap canister vent shut valve
A/f diode
Box
Braided
Braided wire
Ect sensor (rear of eng)
Eld unit
Fuse 10a
Fuse 20a
G101 (top left side of eng)
G301 (behind left side of front bumper)
Hot in on or start
Iat sensor (middle of engine)
Ima circuit
J/c c111 (middle of engine)
J/c c106 (behind glove box)
J/c c110 (middle of engine)
J/c c111 (middle of engine)
Knock sensor (left side of eng block)
Map sensor (left side of eng compt)
Pnk
Power distribution system
Red
Secondary ho2s (middle of eng)
Third ho2s (left side of eng compt)
Tp sensor (on throttle body)
Under- dash fuse/ relay
Under- dash fuse/ relay box
Under- hood fuse/ relay box

1.3L, Engine Performance Wiring Diagram, M/T (3 of 3) for Honda Civic Si 2003

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List of elements for 1.3L, Engine Performance Wiring Diagram, M/T (3 of 3) for Honda Civic Si 2003:

(transmission housing) vss
(under gauge assembly) g501
(under left side of dash) brake pedal position switch
2wbs
A/c system
A17
Acc
Acs
Afshtcr
Anti- theft system
Anti-theft system
B17
Bksw
Box
Brake booster pressure sensor (left side of engine compt)
C10
C11
C12
C13
C14
C15
C16
C17
C18
C19
C20
C21
C22
Cooling fans system
Cruise control, a/c & electronic power steering systems
Cylout
Dimming circuit
Dlc (under left side of dash)
Dvc
E10
E11
E12
E13
E14
E15
E16
E17
E18
E19
E20
E21
E22
E23
E25
E26
E27
E28
E29
E30
E31
Ecm (behind glove box)
Eld
Engrdy
Eop sensor (top left rear of engine)
Eot sensor (near oil filter)
Ftp
Fuel tank pressure sensor (under left side of floor)
Fuse 15a
Fuse 7.5a
G101 (top left side of eng)
G101 (top left side of engine)
Gauge assembly
Hot at all times
Hot in on or start
Hrfanc
Htrs
Icm
Ig1
Igrtne
Igrtni
Ima circuit
Imo fpr
Imocd
Instrument cluster system
J/c c110 (middle of engine)
J/c c103 (on cylinder head cover)
J/c c106 (behind glove box)
K-line
Lg3
M/p mon
Mil
Mil ind
Mota
Motb
Mrly
Nep
P12
Pnk
Poil
Rear ignition coils
Red
Rscd
Scs
Sg3
Starting/ charging system
Stc
Sts
Tho2s
To2shtc
Toil
Under- dash fuse/ relay
Under- hood fuse/ relay
Vcc3
Vsv
Wen

1.7L

1.7L, Engine Performance Wiring Diagram, Except HX & GX (1 of 3) for Honda Civic Si 2003

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List of elements for 1.7L, Engine Performance Wiring Diagram, Except HX & GX (1 of 3) for Honda Civic Si 2003:

(behind glove box) j/c c102
(behind glove box) pgm-fi main relay 1
(behind glove box) pgm-fi main relay 2
(top right rear of eng) g101
A10
A11
A12
A13
A14
A15
A16
A17
A18
A19
A20
A21
A22
A23
A24
A25
A26
A27
A28
A29
A30
A31
Altc
Altf
Altl
B10
B11
B12
B13
B14
B15
B16
B17
B18
B19
B20
B21
B22
B23
B24
Box
Ckp
Ckp sensor (on front of eng)
Cooling fans system
Ecm/pcm (behind glove box)
Ect
Egr
Egr valve & egr valve position sensor (ex) (middle (rear
Egrp
Fanc
Fuel injectors
Fuel pump
Fuel tank unit
Fuse 15a
G101 (top right rear of eng)
G551 (under front passenger's seat)
Hot at all times
Hot in on or start
Iac valve (middle of eng)
Iacv
Iat
Icm
Ignition coils
Igp1
Igp2
Igpls1
Igpls2
Igpls3
Igpls4
Immobilizer control unit receiver
Inj1
Inj2
Inj3
Inj4
J/c c103 (on cylinder head cover)
J/c c104 (on cylinder head cover)
Lg1
Lg2
Lsa+
Lsb+
Map
Pg1
Pg2
Pho2s
Po2shtc
Red
Sg1
Sg2
Sho2s
So2shtc
Starting/ charging system
Tdc
Tdc sensor (on front of eng)
Tps
Under- dash fuse/ relay box
Under- hood fuse/ relay
Vbu
Vcc1
Vcc2
Vccr
Vss
Vtec solenoid valve (ex) (left rear of eng)
Vtpsw
Vts

1.7L, Engine Performance Wiring Diagram, Except HX & GX (2 of 3) for Honda Civic Si 2003

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List of elements for 1.7L, Engine Performance Wiring Diagram, Except HX & GX (2 of 3) for Honda Civic Si 2003:

(middle of eng, near throttle body) evap canister purge valve
(not used except ex)
(not used)
(transmission housing) shift solenoid valve a & b
(transmission housing) tcc solenoid valve
(transmission housing) vss
(under left side of dash) evap canister vent shut valve
(under left side of floor) evap by-pass solenoid valve
A/t clutch pressure control solenoid valves (transmission housing)
Braided wire
Cruise control & instrument cluster systems
Dx/lx
Ect sensor (middle of eng)
Eld unit (usa only)
Fuse 10a
G101 (top right rear of eng)
G201 (behind right side of front bumper)
Hot in on or start
Iat sensor (left side of eng compt)
J/c c102 (behind glove box)
J/c c103 (on cylinder head cover)
J/c c104 (on cylinder head cover)
Knock sensor (left side of eng compt)
Map sensor (left side of eng compt)
Pnk
Power distribution system
Primary ho2s (middle of eng)
Secondary ho2s (middle of eng)
Tp sensor (on throttle body)
Under- dash fuse/ relay box
Under- hood fuse/ relay box
Vtec oil pressure switch (middle of eng)

1.7L, Engine Performance Wiring Diagram, Except HX & GX (3 of 3) for Honda Civic Si 2003

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List of elements for 1.7L, Engine Performance Wiring Diagram, Except HX & GX (3 of 3) for Honda Civic Si 2003:

(ex only)
(not used for canada)
(top right rear of eng) g101
(under gauge assembly) g501
2wbs
A/t reverse relay
A11
A15
A16
A17
Acc
Air conditioning system
Ant-theft system
Atp2
Atpd3
Atpd4
Atpfwd
Atpnp
Atpr
B11
B17
B21
Bksw
Box
Braided wire
Brake pedal position switch (under left side of dash)
C10
C11
C12
C13
C14
C15
C16
C17
C18
C19
C20
C21
C22
Countershaft speed sensor (transmission housing)
Crs
Cruise control syetm
Cruise control system
D10
Dimming circuit
Dlc (under middle of dash)
Driver
Dx only
E10
E11
E12
E13
E14
E15
E16
E17
E18
E19
E20
E21
E22
E23
E24
E25
E26
E27
E28
E29
E30
E31
Ecm/pcm (behind glove box)
Eld
Ftp
Fuel tank pressure sensor (under left side of floor)
Fuse 15a
Fuse 7.5a
G101 (top right rear of eng)
G201 (behind right side of front bumper)
Gauge assembly
Hot at all times
Hot in on or start
Ig1
Ilu
Immobilizer control unit receiver
Imo fpr
Imocd
J/c c102 (behind glove box)
K-line
Lg3
Lsa-
Lsb-
Lx, ex
Mainshaft speed sensor (transmission housing)
Mil
Mil ind
Mrly
Multiplex control unit
Ncsg
Nmsg
Pnk
Psp switch (left side of eng compt)
Pspsw
Red
Scs
Sefmj
Sg3
Sha
Shb
So2s
So2shtc
Starter cut relay
Transmission range switch (transmission housing)
Under- dash fuse/ relay
Under- hood fuse/ relay
Vcc3
Vsv
Wen input

1.7L, Engine Performance Wiring Diagram, GX (1 of 3) for Honda Civic Si 2003

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List of elements for 1.7L, Engine Performance Wiring Diagram, GX (1 of 3) for Honda Civic Si 2003:

(behind glove box) injector relay
(behind glove box) j/c c102
(behind glove box) pgm-fi main relay 1
(behind glove box) pgm-fi main relay 2
(top right rear of eng) g101
A10
A11
A12
A13
A14
A15
A16
A17
A18
A19
A20
A21
A22
A23
A24
A25
A26
A27
A28
A29
A30
A31
Altc
Altf
Altl
B10
B11
B12
B13
B14
B15
B16
B17
B18
B19
B20
B21
B22
B23
B24
Box
Ckp
Ckp sensor (on front of eng)
Cooling fans system
Ect
Fanc
Fuel injectors
Fuse 15a
G101 (top right rear of eng)
Hlc ls +
Hot at all times
Hot in on or start
Iac valve (middle of eng)
Iacv
Iat
Icm
Ignition coils
Igp1
Igp2
Igpls1
Igpls2
Igpls3
Igpls4
Immo- bilizer control unit receiver
Inj mode
Inj1
Inj2
Inj3
Inj4
J/c c103 (on cylinder head cover)
J/c c104 (on cylinder head cover)
Lg1
Lg2
Map
Pcm (behind glove box)
Pg1
Pg2
Red
Sc ls +
Sg1
Sg2
Sh ls +
Starting/ charging system
Tdc
Tdc sensor (on front of eng)
Tps
Under- dash fuse/ relay box
Under- hood fuse/ relay
Vcc1
Vcc2
Vel2

1.7L, Engine Performance Wiring Diagram, GX (2 of 3) for Honda Civic Si 2003

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List of elements for 1.7L, Engine Performance Wiring Diagram, GX (2 of 3) for Honda Civic Si 2003:

(left side of trunk) fuel tank internal solenoid valve
(not used)
(righ side of eng compt) fuel pressure regultor shut- off solenoid valve
(under front passenger's seat) injector control module
(usa only) eld unit
Ect sensor (middle of eng)
Ftp sensor (behind rear seat)
Ftt sensor (behind rear seat)
Fuel pressure regulator switch (right side of eng compt)
Fuel pressure regultor leak check connector (right front of eng compt)
Fuel temper- ature sensor (behind rear seat)
Fuse 10a
G101 (top right rear of eng)
G201 (behind right side of front bumper)
G551 (under front passenger's seat)
Hot in on or start
Iat sensor (left side of eng compt)
J/c c103 (on cylinder head cover)
Map sensor (left side of eng compt)
Pnk
Power distribution system
Red
Tp sensor (on throttle body)
Under- dash fuse/ relay box
Under- hood fuse/ relay box

1.7L, Engine Performance Wiring Diagram, GX (3 of 3) for Honda Civic Si 2003

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List of elements for 1.7L, Engine Performance Wiring Diagram, GX (3 of 3) for Honda Civic Si 2003:

(behind glove box)
(not used for canada)
(top right rear of eng) g101
(transmission housing)
(transmission housing) cvt control valves & inhitor solenoid
(under gauge assembly) g501
A/t reverse relay
A16
A17
Acc
Air condi- tioning system
Anti-theft system
Atpd4
Atpfwd
Atpl
Atpnp
Atpr
Atps
B11
B21
Bksw
Box
Brake pedal position switch (under left side of dash)
C10
C11
C12
C13
C14
C15
C16
C17
C18
C19
C20
C21
C22
Crs
Cruise control syetm
Cruise control sysemt
Cruise control system
Cvt drive pulley speed sensor
Cvt driven pulley speed sensor
Cvt speed change
Cvt speed sensor
D10
Dimming circuit
Dlc (under middle of dash)
Driver
E10
E11
E12
E13
E14
E15
E16
E17
E18
E19
E20
E21
E22
E23
E24
E25
E26
E27
E28
E29
E30
E31
Eld
Ftp
Fuel tank pressure sensor (under left side of floor)
Fuse 15a
Fuse 7.5a
G101 (top right rear of eng)
G201 (behind right side of front bumper)
Gauge assembly
Hlcls (+)
Hot at all times
Hot in on or start
Ig1
Ilu
Imo fpr
Imocd
Inhsol
J/c c102
J/c c102 (behind glove box)
K-line
Lg3
Mil
Mil ind
Mrly
Multiplex control unit
Ncsg
Ndn
Ndr
P1sw
Pcm (behind glove box)
Pfo
Pnk
Pressure cvt pulley
Pressure cvt start
Psp switch (left side of eng compt)
Pspsw
Red
Scls (-)
Scs
Sefmj
Sg3
Shls (-)
Solenoid inhitor
Starter cut relay
Tf2
Tfo
Transmission range switch (transmission housing)
Under- dash fuse/ relay
Under- hood fuse/ relay
Vcc3
Vel1

1.7L, Engine Performance Wiring Diagram, HX A/T (1 of 3) for Honda Civic Si 2003

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List of elements for 1.7L, Engine Performance Wiring Diagram, HX A/T (1 of 3) for Honda Civic Si 2003:

(behind glove box) j/c c102
(behind glove box) pgm-fi main relay 1
(behind glove box) pgm-fi main relay 2
(top right rear of eng) g101
A10
A11
A12
A13
A14
A15
A16
A17
A18
A19
A20
A21
A22
A23
A24
A25
A26
A27
A28
A29
A30
A31
Afs -
Afshtc (-)
Afshtc +
Altc
Altf
Altl
B10
B11
B12
B13
B14
B15
B16
B17
B18
B19
B20
B21
B22
B23
B24
Box
Ckp
Ckp sensor (on front of eng)
Cooling fans system
Ect
Egr
Egr valve & egr valve position sensor (rear of eng)
Egrp
Fanc
Fuel injectors
Fuel pump
Fuel tank unit
Fuse 15a
G101 (top right rear of eng)
G551 (under front passenger's seat)
Hlc ls +
Hot at all times
Hot in on or start under- dash fuse/ relay box
Iac valve (middle of eng)
Iacv
Iat
Icm
Ignition coils
Igp1
Igp2
Igpls1
Igpls2
Igpls3
Igpls4
Immobilizer control unit receiver
Inj1
Inj2
Inj3
Inj4
J/c c103 (on cylinder head cover)
J/c c104 (on cylinder head cover)
Lg1
Lg2
Map
Pcm (behind glove box)
Pg1
Pg2
Pho2s
Red
Sc ls +
Sg1
Sg2
Sh ls +
Sho2s
So2shtc
Starting/ charging system
Tdc
Tdc sensor (on front of eng)
Tps
Under- hood fuse/ relay
Vbu
Vcc1
Vcc2
Vccr
Vel2
Vtec solenoid valve (left rear of eng)
Vtpsw
Vts

1.7L, Engine Performance Wiring Diagram, HX A/T (2 of 3) for Honda Civic Si 2003

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List of elements for 1.7L, Engine Performance Wiring Diagram, HX A/T (2 of 3) for Honda Civic Si 2003:

(behind glove box) a/f sensor relay
(middle of eng) a/f sensor
(middle of eng, near throttle body) evap canister purge valve
(not used)
(under left side of dash) evap canister vent shut valve
(under left side of floor) evap by-pass solenoid valve
(usa only) eld unit
Box
Braided wire
Ect sensor (middle of eng)
Fuse 10a
Fuse 20a
G101 (top right rear of eng)
G201 (behind right side of front bumper)
Hot in on or start
Iat sensor (left side of eng compt)
J/c c102 (behind glove box)
J/c c103 (on cylinder head cover)
J/c c104 (on cylinder head cover)
Knock sensor (left side of eng compt)
Map sensor (left side of eng compt)
Pnk
Power distribution system
Primary ho2s (middle of eng)
Red
Secondary ho2s (middle of eng)
Tp sensor (on throttle body)
Under- dash fuse/ relay
Under- dash fuse/ relay box
Under- hood fuse/ relay box
Vtec oil pressure switch (middle of eng)

1.7L, Engine Performance Wiring Diagram, HX A/T (3 of 3) for Honda Civic Si 2003

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List of elements for 1.7L, Engine Performance Wiring Diagram, HX A/T (3 of 3) for Honda Civic Si 2003:

(not used for canada)
(top right rear of eng) g101
(transmission housing)
(transmission housing) cvt control valves & inhitor solenoid
(under gauge assembly) g501
2wbs
A11
A15
Acc
Afshtor
Air conditioning system
Ant-theft system
Atpd4
Atpfwd
Atpl
Atpnp
Atpr
Atps
B17
Bksw
Box
Brake pedal position switch (under left side of dash)
C10
C11
C12
C13
C14
C15
C16
C17
C18
C19
C20
C21
C22
Computer data lines system
Crs
Cruise control syetm
Cruise control system
Cvt driven pulley speed sensor
Cvt speed change
Cvt speed sensor
D10
Dimming circuit
Dlc (under middle of dash)
Driver
E10
E11
E12
E13
E14
E15
E16
E17
E18
E19
E20
E21
E22
E23
E24
E25
E26
E27
E28
E29
E30
E31
Eld
Ftp
Fuel tank pressure sensor (under left side of floor)
Fuse 15a
Fuse 7.5a
G101 (top right rear of eng)
G201 (behind right side of front bumper)
Gauge assembly
Hlcls (+)
Hot at all times
Hot in on or start
Ig1
Ilu
Imo fpr
Imocd
Inhsol
J/c c102 (behind glove box)
K-line
Lg3
Mil
Mil ind
Mrly
Multiplex control unit
Ncsg
Ndn
Ndr
Pcm (behind glove box)
Pnk
Pressure cvt pulley
Pressure cvt start
Psp switch (left side of eng compt)
Pspsw
Red
Scls (-)
Scs
Sefmj
Sg3
Shls (-)
Solenoid inhitor
Starter cut relay
Tho2s
To2shtc
Transmission range switch (transmission housing)
Under- dash fuse/ relay
Under- hood fuse/ relay
Vcc3
Vel1
Vssout
Vsv

1.7L, Engine Performance Wiring Diagram, HX M/T (1 of 3) for Honda Civic Si 2003

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List of elements for 1.7L, Engine Performance Wiring Diagram, HX M/T (1 of 3) for Honda Civic Si 2003:

(behind glove box) j/c c102
(behind glove box) pgm-fi main relay 1
(behind glove box) pgm-fi main relay 2
(top right rear of eng) g101
A10
A11
A12
A13
A14
A15
A16
A17
A18
A19
A20
A21
A22
A23
A24
A25
A26
A27
A28
A29
A30
A31
Afs -
Afshtc (-)
Afshtc +
Altc
Altf
Altl
B10
B11
B12
B13
B14
B15
B16
B17
B18
B19
B20
B21
B22
B23
B24
Box
Ckp
Ckp sensor (on front of eng)
Cooling fans system
Ecm (behind glove box)
Ect
Egr
Egr valve & egr valve position sensor (rear of eng)
Egrp
Fanc
Fuel injectors
Fuel pump
Fuel tank unit
Fuse 15a
G101 (top right rear of eng)
G551 (under front passenger's seat)
Hot at all times
Hot in on or start under- dash fuse/ relay box
Iac valve (middle of eng)
Iacv
Iat
Icm
Ignition coils
Igp1
Igp2
Igpls1
Igpls2
Igpls3
Igpls4
Immobilizer control unit receiver
Inj1
Inj2
Inj3
Inj4
J/c c103 (on cylinder head cover)
J/c c104 (on cylinder head cover)
Lg1
Lg2
Map
Pg1
Pg2
Pho2s
Red
Sg1
Sg2
Sho2s
So2shtc
Starting/ charging system
Tdc
Tdc sensor (on front of eng)
Tps
Under- hood fuse/ relay
Vbu
Vcc1
Vcc2
Vccr
Vss
Vtec solenoid valve (left rear of eng)
Vtpsw
Vts

1.7L, Engine Performance Wiring Diagram, HX M/T (2 of 3) for Honda Civic Si 2003

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List of elements for 1.7L, Engine Performance Wiring Diagram, HX M/T (2 of 3) for Honda Civic Si 2003:

(behind glove box) a/f sensor relay
(middle of eng) a/f sensor
(middle of eng, near throttle body) evap canister purge valve
(not used)
(under left side of dash) evap canister vent shut valve
(under left side of floor) evap by-pass solenoid valve
(usa only) eld unit
Box
Braided wire
Ect sensor (middle of eng)
Fuse 10a
Fuse 20a
G101 (top right rear of eng)
G201 (behind right side of front bumper)
Hot in on or start
Iat sensor (left side of eng compt)
J/c c102 (behind glove box)
J/c c103 (on cylinder head cover)
J/c c104 (on cylinder head cover)
Knock sensor (left side of eng compt)
Map sensor (left side of eng compt)
Pnk
Power distribution system
Primary ho2s (middle of eng)
Red
Secondary ho2s (middle of eng)
Tp sensor (on throttle body)
Under- dash fuse/ relay
Under- dash fuse/ relay box
Under- hood fuse/ relay box
Vtec oil pressure switch (middle of eng)

1.7L, Engine Performance Wiring Diagram, HX M/T (3 of 3) for Honda Civic Si 2003

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List of elements for 1.7L, Engine Performance Wiring Diagram, HX M/T (3 of 3) for Honda Civic Si 2003:

(not used for canada)
(transmission housing) vss
(under gauge assembly) g501
2wbs
A11
A15
Acc
Afshtor
Air conditioning system
Anti-theft system
Bksw
Box
Brake pedal position switch (under left side of dash)
Computer data lines system
Cruise control & instrument cluster systems
Dimming circuit
Dlc (under middle of dash)
E10
E11
E12
E13
E14
E15
E16
E17
E18
E19
E20
E21
E22
E23
E24
E25
E26
E27
E28
E29
E30
E31
Ecm (behind glove box)
Eld
Ftp
Fuel tank pressure sensor (under left side of floor)
Fuse 15a
Fuse 7.5a
G101 (top right rear of eng)
G201 (behind right side of front bumper)
Gauge assembly
Hot at all times
Hot in on or start
Ig1
Immobilizer control unit receiver
Imo fpr
Imocd
J/c c102 (behind glove box)
J/c c103 (on cylinder head cover)
K-line
Lg3
Mil
Mil ind
Mrly
Multiplex control unit
Pnk
Psp switch (left side of eng compt)
Pspsw
Red
Scs
Sefmj
Sg3
Tho2s
To2shtc
Under- dash fuse/ relay
Under- hood fuse/ relay
Vcc3
Vsv

2.0L

2.0L, Engine Performance Wiring Diagram (1 of 3) for Honda Civic Si 2003

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List of elements for 2.0L, Engine Performance Wiring Diagram (1 of 3) for Honda Civic Si 2003:

(behind glove box) pgm-fi main relay 1
(behind glove box) pgm-fi main relay 2
(front of engine) vtc oil control solenoid valve
(middle of eng) g101
A10
A11
A12
A13
A14
A15
A16
A17
A18
A19
A20
A21
A22
A23
A24
A25
A26
A27
A28
A29
A30
A31
Afs -
Afshtc (-)
Afshtc +
Altc
Altf
Altl
B10
B11
B12
B13
B14
B15
B16
B17
B18
B19
B20
B21
B22
B23
B24
Box
Ckp
Ckp sensor (on front of eng)
Cmp
Cooling fans system
Ecm (behind glove box)
Ect
Fanc
Fuel injectors
Fuel pump
Fuel tank unit
Fuse 15a
G101 (middle of eng)
G551 (under front passenger's seat)
Hot at all times
Hot in on or start under- dash fuse/ relay box
Iac valve (left side of eng)
Iacv
Iat
Icm
Ignition coils
Igp1
Igp2
Igpls1
Igpls2
Igpls3
Igpls4
Immobilizer control unit receiver
Inj1
Inj2
Inj3
Inj4
J/c c104 (left side of engine)
Lg1
Lg2
Map
Pg1
Pg2
Pho2s
Red
Sg1
Sg2
Starting/ charging system
Tdc
Tdc sensor (left side of eng)
Tps
Under- hood fuse/ relay
Vbu
Vcc1
Vcc2
Vss
Vtc +
Vtc -
Vtec solenoid valve (right of eng)
Vtpsw
Vts

2.0L, Engine Performance Wiring Diagram (2 of 3) for Honda Civic Si 2003

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List of elements for 2.0L, Engine Performance Wiring Diagram (2 of 3) for Honda Civic Si 2003:

(middle of eng) a/f sensor
(middle of eng, near throttle body) evap canister purge valve
(not used)
(under left side of floor) evap by-pass solenoid valve
(under right rear of vehicle) evap canister vent shut valve
(usa only) eld unit
A/f sensor relay
Box
Braided
Cmp sensor (left side of engine)
Ect sensor (middle of eng)
Fuse 10a
Fuse 20a
G101 (middle of eng)
G201 (behind right side of front bumper)
Hot in on or start
Iat sensor (left side of eng compt)
J/c c104 (left side of engine)
Knock sensor (left side of eng compt)
Map sensor (left side of eng compt)
Pnk
Power distribution system
Secondary ho2s (middle of eng)
Tp sensor (on throttle body)
Under- dash fuse/ relay
Under- dash fuse/ relay box
Under- hood fuse/ relay box
Vtec oil pressure switch (middle of eng)

2.0L, Engine Performance Wiring Diagram (3 of 3) for Honda Civic Si 2003

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List of elements for 2.0L, Engine Performance Wiring Diagram (3 of 3) for Honda Civic Si 2003:

(left front of engine compt) test tachometer connector
(transmission housing) vss
2wbs
Acc
Afshtor
Air conditioning system
Anti-lock brake system
Anti-theft system
Bksw
Box
Braided
Brake pedal position switch (under left side of dash)
C17
C19
Computer data lines system
Dlc (under left side of dash)
E10
E11
E12
E13
E14
E15
E16
E17
E18
E19
E20
E21
E22
E23
E24
E25
E26
E27
E28
E29
E30
E31
Ecm (behind glove box)
Eld
Eps control unit (under right side of dash)
Ftp
Fuel tank pressure sensor (under left side of floor)
Fuse 15a
Fuse 7.5a
G101 (middle of eng)
Gauge assembly
Hot at all times
Hot in on or start
Ig1
Immobilizer control unit receiver
Imo fpr
Imocd
J/c c103 (on cylinder head cover)
K-line
Lg3
Mil
Mil ind
Mrly
Multiplex control unit
Nep
Pnk
Pspsw
Red
Scs
Sefmj
Sg3
Sho2s
So2shtc
Tach input
Under- dash fuse/ relay
Under- hood fuse/ relay
Vcc3
Vsv
Wen

EXTERIOR LIGHTS

Back-up Lamps Wiring Diagram, Except Hatchback & Hybrid for Honda Civic Si 2003

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List of elements for Back-up Lamps Wiring Diagram, Except Hatchback & Hybrid for Honda Civic Si 2003:

(at middle of trunk) g601
(at top right rear side of engine) g101
(coupe)
(sedan)
A/t
A/t except cvt
A/t gear position indicator
A/t reverse relay (behind glove box)
B18 b4
B6 b11
Back-up light switch (on transaxle housing)
C10
Cvt
D11
Fuse 10 7.5a
Gauge assembly
Hot in on or start
Hx, lx, ex except hx, lx, ex
Junction connector c102 (behind glove compartment)
Junction connector c103 (on cylinder head cover)
Left back-up light
M/t
Pcm (behind glove box)
Right back-up light
Transmission range switch (on transaxle housing)
Underdash fuse/relay box (under left side of dash)

Back-up Lamps Wiring Diagram, Hatchback for Honda Civic Si 2003

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List of elements for Back-up Lamps Wiring Diagram, Hatchback for Honda Civic Si 2003:

(not used)
Back-up light switch (transmission housing)
D11
Fuse 10 7.5a
G553 (right side of cargo area)
Hot in on or start
Left back-up light
Right back-up light
Underdash fuse/relay box (under left side of dash)

Back-up Lamps Wiring Diagram, Hybrid for Honda Civic Si 2003

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List of elements for Back-up Lamps Wiring Diagram, Hybrid for Honda Civic Si 2003:

A/t gear position indicator
A/t reverse relay (behind glove box)
A17
B10
B11
B21
Back-up light switch (on transaxle housing)
Cvt
D11
Ecm (behind glove box)
Fuse 10 7.5a
G101 (at top left side of engine)
G601 (at middle of trunk)
Gauge assembly
Hot in on or start
Junction connector c106 (behind glove box)
Junction connector c109 (on middle of engine)
Junction connector c111 (on middle of engine)
Left back-up light
M/t
Right back-up light
T5 (thermal joint)
Tcm (behind right kick panel)
Transmission range switch (on transaxle housing)
Underdash fuse/relay box (under left side of dash)

Exterior Lamps Wiring Diagram, Except Hatchback & Hybrid (1 of 2) for Honda Civic Si 2003

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List of elements for Exterior Lamps Wiring Diagram, Except Hatchback & Hybrid (1 of 2) for Honda Civic Si 2003:

A22
B11
B12
B13
B18
C11
C12
C13
Combination light switch
Except hx, lx, ex
Fuse 19 7.5a
Fuse 2 15a
Fuse 5 10a
G201 (behind right side of front bumper)
G301 (behind left side of front bumper)
G401 (under gauge assembly)
G501 (under gauge assembly)
G601 (at middle of trunk)
Gauge assembly
Hazard warning switch
Hazard warning switch light
Head
Headlight switch
Hot at all times
Hot in on or start
Hx, lx, ex
Interior lights system
Left
Left front turn signal/ side marker light
Left parking light
Left rear turn signal light
Left turn signal indicator
Multiplex control unit
Off
P15
Park
Red
Right
Right front turn signal/ side marker light
Right parking light
Right rear turn signal light
Right turn signal indicator
Security control unit connector (optional)
Taillight relay
To brake light/ taillights (diagram 2 0f 2)
Turn signal switch
Turn signal/ hazard relay
Underdash fuse/relay box (under left side of dash)
Underhood fuse/relay box (right side of engine compartment)

Exterior Lamps Wiring Diagram, Except Hatchback & Hybrid (2 of 2) for Honda Civic Si 2003

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List of elements for Exterior Lamps Wiring Diagram, Except Hatchback & Hybrid (2 of 2) for Honda Civic Si 2003:

(right side of engine compt)
(under left side of dash)
Brake pedal position switch
Coupe
Coupe lx & ex
Cruise control actuator
Cruise control unit
E22
Ecm/pcm (behind glove box)
From taiillight relay (diagram 1 of 2)
Fuse 7 15a
G601 (at middle of trunk)
Hiigh mount brake light
Hot at all times
Left brake light/ taiil- light
Left side marker light (coupe) left inner taillight (sedan)
License plate light
O12
Right brake light/ taiillight
Right side marker light (coupe) right inner taillight (sedan)
Sedan
Underdash fuse/relay box (under left side of dash)
Underhood fuse/relay box (right side of engine compartment)
Usa hx & sedan lx, gx & ex
W/ accessory rear spoiler
W/o accessory rear spoiler

Exterior Lamps Wiring Diagram, Hatchback (1 of 2) for Honda Civic Si 2003

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List of elements for Exterior Lamps Wiring Diagram, Hatchback (1 of 2) for Honda Civic Si 2003:

A22
B10
B12
C11
C12
C13
Combination light switch
Fuse 19 7.5a
Fuse 2 15a
Fuse 5 10a
G201 (right front of vehicle)
G301 (left front of vehicle)
G401 (under gauge assembly)
G501 (under gauge assembly)
G502 (under right side of dash)
G553 (right side of cargo area)
Gauge assembly
Hazard warning switch
Hazard warning switch light
Head
Headlight switch
Hot at all times
Hot in on or start
Interior lights system
Left
Left front park- ing light
Left front side marker light
Left front turn signal light
Left rear turn signal light
Left side turn signal light
Left turn signal ind
M12
Multiplex control unit
Off
P15
Park
Red
Right
Right front park- ing light
Right front side marker light
Right rear turn signal light
Right side turn signal light
Right turn signal ind
Taillight relay
To brake light/ taillights (diagram 2 0f 2)
Turn signal switch
Turn signal/ hazard relay
Underdash fuse/relay box (under left side of dash)
Underhood fuse/relay box (on right side of engine compartment)

Exterior Lamps Wiring Diagram, Hatchback (2 of 2) for Honda Civic Si 2003

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List of elements for Exterior Lamps Wiring Diagram, Hatchback (2 of 2) for Honda Civic Si 2003:

(under left side of dash)
Brake pedal position switch
Cruise control unit (below left side of dash)
From taiillight relay (diagram 1 of 2)
Fuse 7 15a
G552 (behind right rear seat back)
G553 (right side of cargo area)
Hiigh mount brake light
Hot at all times
Left brake light/ taiillight
Left rear side marker light
License plate lights
Right brake light/ taiillight
Right rear side marker light
Under-dash fuse/relay box
Underhood fuse/relay box (on right side of engine compartment)

Exterior Lamps Wiring Diagram, Hybrid (1 of 2) for Honda Civic Si 2003

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List of elements for Exterior Lamps Wiring Diagram, Hybrid (1 of 2) for Honda Civic Si 2003:

(not used)
A10
A12
A17
C11
C12
C13
Combination light switch
Fuse 19 7.5a
Fuse 3 10a
Fuse 5 10a
G201 (behind right side of front bumper)
G301 (behind left side of front bumper)
G401 (under gauge assembly)
G501 (under gauge assembly)
G601 (at middle of trunk)
Gauge assembly
Gauges and indicators
Hazard warning switch
Hazard warning switch light
Head
Headlight switch
Hot at all times
Hot in on or start
Interior lights system
Left
Left front parking light
Left front turn signal/ side marker light
Left rear turn signal light
Left turn signal indicator
M12
Multiplex control unit
Off
P15
Park
Red
Right
Right front parking light
Right front turn signal/ side marker light
Right rear turn signal light
Right turn signal indicator
Security control unit connector (optional)
Taillight relay
To brake light/ taillights (diagram 2 0f 2)
Turn signal switch
Turn signal/ hazard relay
Underdash fuse/relay box (under left side of dash)
Underhood fuse/relay box (on left side of engine compartment)

Exterior Lamps Wiring Diagram, Hybrid (2 of 2) for Honda Civic Si 2003

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List of elements for Exterior Lamps Wiring Diagram, Hybrid (2 of 2) for Honda Civic Si 2003:

(behind glove box)
(under left side of dash)
A26
Brake pedal position switch
Cruise control unit (under left side of dash)
E22
Ecm
From taiillight relay (diagram 1 of 2)
Fuse 7 15a
G601 (at middle of trunk)
Hiigh mount brake light
Hot at all times
Left brake light/ taillight
Left inner taillight light
License plate light
O12
Right brake light/ taillight
Right inner taillight light
Transmission control module (cvt) (behind right kick panel)
Underdash fuse/relay box (under left side of dash)
Underhood fuse/relay box (on left side of engine compartment)

GROUND DISTRIBUTION

Ground Distribution Wiring Diagram, Except Hatchback & Hybrid (1 of 3) for Honda Civic Si 2003

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List of elements for Ground Distribution Wiring Diagram, Except Hatchback & Hybrid (1 of 3) for Honda Civic Si 2003:

(ex & hx) vtec oil pressure switch
(ex)
(hx) secondary ho2s shield
A/t except cvt
A20
A23
A24
Audio unit
Battery
Braided wire
Ckp sensor
Coil assembly
Countershaft speed sensor shield
Coupe
Cvt
Cvt drive pulley speed sensor
Cvt driven pulley speed sensor
Cvt speed sensor 1
Cvt speed sensor 2
Dlc
Ecm/ pcm
Ecm/pcm
Egr valve & egr valve position sensor
Ex & hx
Except cvt
Except ex & hx
G1 (right side of engine compt)
G101 (at top right rear side of engine)
G102 (at top left rear side of engine)
G2 (at top right rear side of engine)
G451 (under middle of dash)
G503 (under right side of dash)
G701 (left ``c" pillar)
Iac valve
Ignition coil 1
Ignition coil 2
Ignition coil 3
Ignition coil 4
Injector control module
J/c c104 (on cylinder head cover)
Junction connector c103 (on cylinder head cover)
Knock sensor shield
Mainshaft speed sensor shield
Pcm
Primary ho2s shield
Radiator fan switch
Rear window defogger
Secondary ho2s shield
Tcc solenoid valve
Tdc sensor
Transmission
Transmission range switch
Vss

Ground Distribution Wiring Diagram, Except Hatchback & Hybrid (2 of 3) for Honda Civic Si 2003

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List of elements for Ground Distribution Wiring Diagram, Except Hatchback & Hybrid (2 of 3) for Honda Civic Si 2003:

(canada) drl control unit
(canada) left power mirror
(canada) windshield washer fluid level switch
(except dx) driver's door lock switch
(except dx) power mirror switch
(except sedan)
(not used)
(right side of engine compartment) underhood fuse/relay box
(sedan)
(under left side of dash) underdash fuse/relay box
A/c condenser fan motor
A11
A16
Abs modulator- control unit
B11
B18
Blower motor relay
Brake fluid level switch
Ceiling light/ spotlights
Coupe lx, ex
Cruise control actuator
Cruise control main switch
Cruise control unit
D13
Driver's door lock knob switch
Driver's power window motor
Eld unit
Except abs
Except dx
Except hx, lx, ex
Fuel pressure regulator shut-off solenoid valve
Fuel pressure regulator switch
G201 (behind right side of front bumper)
G301 (behind left side of front bumper)
G302 (left side of engine compt)
G501 (under gauge assembly)
Gauge assembly
Gnd
Hx, lx, ex
K16
Left front turn signal/ side marker light
Left parking light
Moonroof close relay
Moonroof open relay
Moonroof switch
Multiplex control unit
Multiplex control unit service check connector
Park pin/ shift switch
Power window master switch
Power window relay
Psp switch
Radiator fan motor
Right front turn signal/ side marker light
Right parking light
Turn/ signal hazard relay
Usa
Usa hx & sedan lx ex, gx
Usa hx & sedan lx, ex, gx
Windshield washer motor
Windshield wiper motor

Ground Distribution Wiring Diagram, Except Hatchback & Hybrid (3 of 3) for Honda Civic Si 2003

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List of elements for Ground Distribution Wiring Diagram, Except Hatchback & Hybrid (3 of 3) for Honda Civic Si 2003:

(canada) right power mirror
(coupe dx, hx)
(ex) keyless receiver unit
(exc sedan)
(except gx) fuel tank unit
(gx) fuel tank internal solenoid valve
(optional) security control unit connector
(sedan)
(under left side of dash) underdash fuse/relay box
(w/ side air bag) opds unit
A11
A12
A13
Accessory power socket
Blower power transistor
Clutch interlock switch
Clutch pedal position switch
Combination light switch
Coupe
Driver's seat belt switch
Front passenger's seat belt switch
Fuel gauge sending unit
Fuel pump
G401 (under gauge assembly)
G402 (under middle of dash)
G502 (under middle of dash)
G551 (under front passenger's seat)
G601 (middle of trunk)
Heater control panel
High mount brake light
Ignition key switch/key light
Left back-up light
Left brake light/ taillight
Left front impact sensor
Left inner taillight
Left rear turn signal light
Left side marker light
License plate light
M/t
Mes connector
Multiplex control unit
Right back-up light
Right brake light/ taillight
Right front impact sensor
Right inner taillight
Right rear turn signal light
Right side marker light
Sedan
Srs unit
Trunk latch switch
W/ accessory rear spoiler
W/o accessory rear spoiler
Wiper/ washer switch

Ground Distribution Wiring Diagram, Hatchback (1 of 3) for Honda Civic Si 2003

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List of elements for Ground Distribution Wiring Diagram, Hatchback (1 of 3) for Honda Civic Si 2003:

(not used)
(right side of engine compartment) underhood fuse/relay box
A23
A24
Battery
Canada
Ckp sensor
Cmp sensor
Dlc
Ecm
Electrical load detector (eld) unit
Engine
Eps unit
G1 (left side of engine compt)
G101 (top of engine)
G151 (under right side of dash)
G2 (right side of engine compt)
G201 (right front of vehicle)
G451 (under middle of dash)
Gnd
Iac valve
Ignition coil 1
Ignition coil 2
Ignition coil 3
Ignition coil 4
J/c c104 (left side of engine)
K16
Knock sensor shield
Multiplex control unit
Multiplex control unit service check connector
Power window relay
Rear window washer motor
Right front parking light
Right front side marker light
Right front turn signal light
Tdc sensor
Transmission
Turn/ signal hazard relay
Underhood fuse/relay box
Vss
Vtec oil pressure switch
Vtec solenoid valve
Windshield washer fluid level switch
Windshield washer motor
Winshield wiper motor

Ground Distribution Wiring Diagram, Hatchback (2 of 3) for Honda Civic Si 2003

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List of elements for Ground Distribution Wiring Diagram, Hatchback (2 of 3) for Honda Civic Si 2003:

A/c condensor fan motor
A11
A12
A13
A20
Abs modulator- control unit
Audio unit
Blower motor relay
Brake fluid level switch
Canada
Ceiling light/ spotlights
Clutch interlock switch
Clutch pedal position switch
Combination light switch
Cruise control actuator
Cruise control main switch
Cruise control unit
D13
Driver's door lock knob switch
Driver's door lock switch
Driver's power window motor
Drl control unit
G202 (right front of vehicle)
G301 (left front of vehicle)
G401 (under gauge assembly)
G402 (under right side of dash)
G501 (under gauge assembly)
G503 (under middle of dash)
Heater control panel
Ignition key switch/key light
Left front impact sensor
Left front parking light
Left front side marker light
Left power mirror
Left side turn signal light
Leftt front turn signal light
Moonroof auto-stop switch
Moonroof close relay
Moonroof control unit
Moonroof open relay
Moonroof switch
Power mirror switch
Power transistor
Power window master switch
Radiator fan motor
Radiator fan switch
Right front impact sensor
Security control unit connector
Srs unit
Underhood fuse/relay box
Wiper/ washer switch

Ground Distribution Wiring Diagram, Hatchback (3 of 3) for Honda Civic Si 2003

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List of elements for Ground Distribution Wiring Diagram, Hatchback (3 of 3) for Honda Civic Si 2003:

Accessory power socket
B11
B12
Canada
Driver's seat belt switch
Fuel gauge sending unit
Fuel pump
Fuel tank unit
G502 (under right side of dash)
G551 (under passenger's seat)
G552 (behind right rear seat back)
G553 (right side of cargo area)
Gauge assembly
Hatch latch switch
High mount brake light
Keyless receiver unit
Left back-up light
Left brake light/ taillight
Left rear side marker light
Left rear turn signal light
License plate light
Mes connector
Multiplex control unit
Opds unit
Passenger's seat belt switch
Rear window defogger
Rear window defogger noise condenser
Rear window wiper intermittent control unit
Rear window wiper motor
Rear window wiper noise condenser
Right back-up light
Right brake light/ taillight
Right power mirror
Right rear side marker light
Right rear turn signal light
Right side turn signal light
Underdash fuse/relay box
W/side airbag

Ground Distribution Wiring Diagram, Hybrid (1 of 3) for Honda Civic Si 2003

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List of elements for Ground Distribution Wiring Diagram, Hybrid (1 of 3) for Honda Civic Si 2003:

(cvt) tcm
(m/t) vss
A20
A23
A24
A31
Audio unit
B17
Battery
Braided wire
Ckp sensor
Cmp sensor
Cvt
Data link connector
Ecm
Egr valve & egr valve position sensor
Engine
Front ignition coil 1
Front ignition coil 2
Front ignition coil 3
Front ignition coil 4
G1 (at left front corner of engine compartment)
G101 (at top left side of engine)
G2 (at right side of engine compartment)
G503 (under middle of dash)
G504 (under middle of dash)
G701 (at left side of rear shelf)
Iac valve
Junction connector c106 (behind glove box)
Junction connector c111 (on middle of engine)
Junction connector c801 (under mpi)
Knock sensor shield
M/t
Mcm
Mcm shield
Mpi module
Neutral position switch
Rear ignition coil 1
Rear ignition coil 2
Rear ignition coil 3
Rear ignition coil 4
Rear window defogger
Secondary ho2s shield
T5 (terminal) joint)
Transmission
Transmission range switch
Vtec solenoid valve

Ground Distribution Wiring Diagram, Hybrid (2 of 3) for Honda Civic Si 2003

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List of elements for Ground Distribution Wiring Diagram, Hybrid (2 of 3) for Honda Civic Si 2003:

(canada) drl control unit
(canada) left power mirror
(canada) washer fluid level switch
(cvt) cas valves a & b
(cvt) idle stop switch
(cvt) park pin/ shift switch
(not used)
(on left side of engine compartment) underhood fuse/relay box
(under left side of dash) underdash fuse/relay box
A/c condenser fan motor
A17
Abs modulator- control unit
B16
Blower motor relay
Brake fluid level switch
Cruise control actuator
Cruise control main switch
Cruise control unit
D13
Driver's door lock knob switch
Driver's door lock switch
Driver's power window motor
Eld unit
G201 (behind right side of front bumper)
G202 (behind right side of front bumper)
G301 (behind left side of front bumper)
G501 (under gauge assembly)
Gauge assembly
Gnd
K16
Left front turn signal/ side marker light
Left parking light
Multiplex control unit
Multiplex control unit service check connector
Power mirror switch
Power window master switch
Power window relay
Radiator fan motor
Radiator fan switch
Right front parking light
Right front turn signal/ side marker light
Turn signal/ hazard relay
Windshield washer motor
Windshield wiper motor

Ground Distribution Wiring Diagram, Hybrid (3 of 3) for Honda Civic Si 2003

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List of elements for Ground Distribution Wiring Diagram, Hybrid (3 of 3) for Honda Civic Si 2003:

(canada) right power mirror
(m/t) clutch interlock switch
(m/t) clutch pedal position switch
(w/ side air bag) opds unit
A11
A12
A20
A22
A23
Accessory power socket
Blower power transistor
Bypass contactor
Climate control unit
Combination light switch
Cvt
Dc-dc converter
Driver's seat belt switch
Eps control unit
Front passenger's seat belt switch
Fuel pump
Fuel tank unit
G151 (under middle of dash)
G401 (under gauge assembly)
G402 (under middle of dash)
G502 (behind right side of dash)
G551 (under front passenger's seat)
G601 (at middle of trunk)
G651 (at left rear side of passenger's floor)
High mount brake light
High voltage contactor
Ignition key switch/key light
Ipu module fan
Junction connector c801 (under mpi)
Keyless receiver unit
Left back-up light
Left brake light/ taillight
Left front impact sensor
Left inner taillight
Left rear turn signal light
License plate light
Mcm
Mes connector
Right back-up light
Right brake light/ taillight
Right front impact sensor
Right inner taillight
Right rear turn signal light
Security control unit connector (optional)
Srs unit
Trunk latch switch
Wiper/ washer switch

HEADLIGHTS

Headlights Wiring Diagram, Except Hatchback or Hybrid with DRL for Honda Civic Si 2003

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List of elements for Headlights Wiring Diagram, Except Hatchback or Hybrid with DRL for Honda Civic Si 2003:

(not used)
(optional)
A15
A17
A20
B+ day lt
B10
Brake level switch
Brake system indicator
Bus
Combination light switch
Cpu
Dimmer hi
Dimmer switch
Driver circuit
Drl control unit (under left side of dash)
Drl h/l sw
Drl indicator
Drl relay (under middle of dash)
Except hx, lx, ex
F10
F11
F12
F4 (not used)
Flash-to- pass switch
Fuse 10a
Fuse 15 15a
Fuse 17 15a
Fuse 19 80a
Fuse 7.5a
G401 (under gauge assembly)
G501 (under gauge assembly)
Gauge assembly
Head
Headlight relay
Headlight switch
Headlt hi
Headlt low
High
High beam indicator
Hot at all times
Hot in on
Hot in on or start
Hx, lx, ex
Ig2 day lt
Instrument cluster system
Interior lights system
K10
Left headlight
Light relay
Low
Low beam cut relay (under middle of dash)
Multiplex control unit
Off
Park
Parking brake switch (at base of park lever)
Red
Right headlight
Security control unit connector
Underdash fuse/relay box (under left side of dash)
Underhood fuse/relay box (right side of engine compartment)

Headlights Wiring Diagram, Except Hatchback or Hybrid without DRL for Honda Civic Si 2003

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List of elements for Headlights Wiring Diagram, Except Hatchback or Hybrid without DRL for Honda Civic Si 2003:

(not
(not used)
(under left side of dash, near underdash fuse/ relay box)
20a
Combination light switch
Control unit connector (optional)
Dimmer hi
Dimmer switch
Drl h/l sw
F10
F12
Flash-to- pass switch
Fog light diode
Fog light fuse
Fog light relay 1
Fog light relay 2
Fog light switch
Fog light switch light
Fuse 15 15a
Fuse 17 15a
Fuse 19 80a
Fuse 40a
G10 (at left side of engine compt)
G11 (at right side of engine compt)
G401 (under gauge assembly)
Gauge assembly
Head
Headlight relay
Headlight switch
Headlt hi
Headlt low
High
High beam indicator
Hot at all times
Hx, lx, ex except hx, lx, ex
Interior lights system
Left fog light
Left headlight
Light relay
Low
Multiplex control unit
Off
On indicator
Park
Red
Right fog light
Right headlight
Security
Underdash fuse/relay box (under left side of dash)
Underhood fuse/relay box (right side of engine compartment)
Used)

Headlights Wiring Diagram, Hatchback with DRL for Honda Civic Si 2003

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List of elements for Headlights Wiring Diagram, Hatchback with DRL for Honda Civic Si 2003:

(not used)
A11
A17
B+ day lt
B13
Brake fluid level switch
Brake level switch
Bus meter
Combination light switch
Control unit connector
Cpu
Dimmer hi
Dimmer switch
Driver circuit
Drl control unit (under left side of dash)
Drl h/l sw
Drl relay (under middle of dash)
F10
F11
F12
Flash-to- pass switch
Fuse 10 7.5a
Fuse 12 7.5a
Fuse 15 15a
Fuse 17 15a
Fuse 19 80a
Fuse 3 10a
G401 (under gauge assembly)
G501 (under gauge assembly)
Gauge assembly
Headlight relay 1
Headlight relay 2
Headlight switch
Headlt hi
Headlt low
High
High beam indic
Hot at all times
Hot in on
Hot in on or start
Ig2 day lt
Interior lights system
K10
Left headlight
Light relay
Low
Low beam cut relay (under middle of dash)
Multiplex control unit
Off
Park
Parking brake switch
Red
Right headlight
Security
Underdash fuse/relay box (under left side of dash)
Underhood fuse/relay box (on right side of engine compartment)

Headlights Wiring Diagram, Hatchback without DRL for Honda Civic Si 2003

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List of elements for Headlights Wiring Diagram, Hatchback without DRL for Honda Civic Si 2003:

20a
A11
Combination light switch
Dimmer hi
Dimmer switch
Drl h/l sw
F10
F12
Flash-to- pass switch
Foglight in-line fuse (behind left side of dash, near underdash fuse/ relay box)
Foglight on indicator
Foglight relay 1 (behind left kick panel)
Foglight relay 2 (behind left kick panel)
Foglight switch
Foglight switch light
Fuse 14 40a
Fuse 15 15a
Fuse 17 15a
Fuse 19 80a
G201 (behind right side of front bumper)
G301 (behind left side of front bumper)
G401 (under gauge assembly)
Gauge assembly
Headlight switch
Headlights relay 1
Headlights relay 2
Headlt hi
Headlt low
High
High beam indic
Hot at all times
Interior lights system
Left foglight
Left headlight
Light relay
Low
Multiplex control unit
Off
Park
Red
Right foglight
Right headlight
Security control unit connector
Underdash fuse/relay box (behind left side of dash, right of steering column)
Underhood fuse/relay box (on left side of engine compartment)

Headlights Wiring Diagram, Hybrid with DRL for Honda Civic Si 2003

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List of elements for Headlights Wiring Diagram, Hybrid with DRL for Honda Civic Si 2003:

(not used)
A11
A13
A14
B+ day lt
B17
Brake level switch
Brake system indicator
Bus
Combination light switch
Control unit connector (optional)
Dimmer hi
Dimmer switch
Drl control unit (under left side of dash)
Drl h/l sw
Drl indicator
Drl relay (under middle of dash)
Eld unit
F10
F11
F12
Flash-to- pass switch
Fuse 10 7.5a
Fuse 12 7.5a
Fuse 15 15a
Fuse 17 15a
Fuse 19 80a
Fuse 3 10a
G401 (under gauge assembly)
G501 (under gauge assembly)
Gauge assembly
Head
Headlight relay 1
Headlight relay 2
Headlight switch
Headlt hi
Headlt low
High
High beam indicator
Hot at all times
Hot in on
Hot in on or start
Ig2 day lt
Instrument cluster system
Interior lights system
K10
Left headlight
Light relay
Lo hi
Low
Low beam cut relay (under middle of dash)
Multiplex control unit
Off
Park
Parking brake switch
Red
Red
Right headlight
Security
Underdash fuse/relay box (under left side of dash)
Underhood fuse/relay box (on left side of engine compartment)

Headlights Wiring Diagram, Hybrid without DRL for Honda Civic Si 2003

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List of elements for Headlights Wiring Diagram, Hybrid without DRL for Honda Civic Si 2003:

(not used)
A13
A14
Combination light switch
Control unit connector (optional)
Dimmer hi
Dimmer switch
Drl h/l sw
Eld unit
F10
F12
Flash-to- pass switch
Fuse 15 15a
Fuse 17 15a
Fuse 19 80a
G401 (under gauge assembly)
Gauge assembly
Head
Headlight relay 1
Headlight relay 2
Headlight switch
Headlt hi
Headlt low
Hi lo
High
High beam indicator
Hot at all times
Interior lights system
Left headlight
Light relay
Lo hi
Low
Multiplex control unit
Off
Park
Red
Right headlight
Security
Underdash fuse/relay box (under left side of dash)
Underhood fuse/relay box (on left side of engine compartment)

HORN

Horn Wiring Diagram, Except Hybrid for Honda Civic Si 2003

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List of elements for Horn Wiring Diagram, Except Hybrid for Honda Civic Si 2003:

(not used)
Cable reel
Cruise control set/ resume/ cancel switch
Fuse 7 15a
Horn
Horn relay
Horn sw
Horn switch
Hot at all times
Multiplex control unit
Nca
Red
Security control unit connector (optional) (under left side of dash)
Steering wheel
Underdash fuse/relay box (under left side of dash)
Underhood fuse/relay box (right side of engine compartment)

Horn Wiring Diagram, Hybrid for Honda Civic Si 2003

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List of elements for Horn Wiring Diagram, Hybrid for Honda Civic Si 2003:

(not used)
Cable reel
Cruise control set/ resume/ cancel switch
Fuse 7 15a
Horn
Horn relay
Horn sw
Horn switch
Hot at all times
Multiplex control unit
Nca
Red
Security control unit connector (optional) (under left side of dash)
Steering wheel
Underdash fuse/relay box (under left side of dash)
Underhood fuse/ relay box (on left side of engine compartment)

INSTRUMENT CLUSTER

Instrument Cluster Wiring Diagram, DX, GX (1 of 2) for Honda Civic Si 2003

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List of elements for Instrument Cluster Wiring Diagram, DX, GX (1 of 2) for Honda Civic Si 2003:

(canada)
(gx)
(not used)
(under gauge assembly) g501
A10
A11
A12
A13
A14
A15
A16
A17
A18
A19
A20
A21
A22
Abs indicator
Abs indicator circuit
Anti-lock brakes system
B10
B11
B12
B13
B14
B15
B16
B17
B18
B19
B20
B21
B22
Beeper
Brake fluid level switch (on master cylinder reservoir)
Brake level sw
Bus (meter)
Bus (sefmj)
Canada
Charging system indicator
Cpu
Cruise control indicator (except dx)
Cruise control system
Cvt
Door indicator light
Drive circuit
Drl control unit (under left side of dash)
Drl indicator
E10
Engine controls system
Except cvt
Except gx
Exterior lights system
Fuel gauge sending unit
Fuel tank unit (on top of fuel tank)
Fuse 10a
Fuse 7.5a
G101 (at top right rear side of engine)
G301 (behind left side of front bumper)
G551 (under front passenger's seat)
Gauge assembly
Headlights system
Hot in on or start
Ig1 (meter)
Immobilizer control unit- receiver (in steering column cover)
Interior lights system
Junction connector c102 (behind glove compt)
Junction connector c103 (on cylinder head cover)
Junction connector c104 (on cylinder head cover)
K10
Left turn signal indicator
Low fuel indicator
Low oil pressure indicator
Maintenance required indicator
Malfunction indicator
Multiplex control unit
O11
Oil pressure switch (near oil filter)
Parking brake & brake system indicator
Parking brake switch (at base of park lever)
Pnk
Power circuit
Red
Right turn signal indicator
Seat belt reminder
Side airbag cut-off indicator
Srs indicator
Srs indicator circuit
Switch trip/reset
Trunk open indicator
Underdash fuse/relay box (under left side of dash)
Usa
Vss (except cvt) (on transaxle housing)
Washer fluid level switch (canada) (behind left side of front bumper)
Washer level indicator (canada)

Instrument Cluster Wiring Diagram, DX, GX (2 of 2) for Honda Civic Si 2003

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List of elements for Instrument Cluster Wiring Diagram, DX, GX (2 of 2) for Honda Civic Si 2003:

(cvt)
(exc cvt)
(vssout)
2 indicator
A12
A13
A16
A18
B10
B11
B16
B17
B18
B22
Bus (sefmj)
Coolant temperature gauge
Cpu
D11
D3 indicator
Dash & console lights
Dash lights brightness controller
Dimming circuit
Drive circuit
Driver
E24
E25
E26
E31
Ecm/pcm (behind glove box)
Fuel gauge
Fuse 10a
Gauge assembly
Gauge lights
High beam indicator
Hot at all times
Immobilizer system indicator
L indicator
Lcd back light
Mil cntrl
Odo/trip lcd back light stabilizing power circuit
Odometer/trip lcd display
Pcm (behind glove box)
Rpm out (nep)
S indicator
Sensor input
Speedometer
Tachometer
Test tachometer connector (right side of engine compt)
Underdash fuse/relay box (under left side of dash)
Underhood fuse/relay box (right side of engine compt)

Instrument Cluster Wiring Diagram, EX, HX, LX (1 of 2) for Honda Civic Si 2003

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List of elements for Instrument Cluster Wiring Diagram, EX, HX, LX (1 of 2) for Honda Civic Si 2003:

(canada)
(not used)
(under gauge assembly)
A10
A11
A12
A13
A14
A15
A16
A17
A18
A19
A20
A21
A22
Abs indicator
Abs indicator circuit
Anti-lock brakes system
B10
B11
B12
B13
B14
B15
B16
B17
B18
B19
B20
B21
B22
Beeper
Brake fluid level switch (on master cylinder reservoir)
Brake level sw
Brake system indicator
Bus (meter)
Bus (sefmj)
Canada
Charging system indicator
Circuit
Cpu
Cruise control indicator
Cruise control system
Cvt
Door indicator light
Drive circuit
Drl control unit (under left side of dash)
Drl indicator
E10
Engine controls system
Except cvt
Exterior lights system
Fuel gauge sending unit
Fuel tank unit (on top of fuel tank)
Fuse 10a
Fuse 7.5a
G101 (at top right rear side of engine)
G301 (behind left side of front bumper)
G501
G551 (under front passenger's seat)
Gauge assembly
Headlights system
Hot in on or start
Ig1 (meter)
Immobilizer control unit- receiver (in steering column cover)
Immobilizer system indicator
Interior lights system
Junction connector c102 (behind glove compt)
Junction connector c103 (on cylinder head cover)
Junction connector c104 (on cylinder head cover)
K10
Lcd/dial diameter circuit
Left turn signal indicator
Low fuel indicator
Low oil pressure indicator
Maintenance required indicator
Malfunction indicator
Multiplex control unit
O11
Oil pressure switch (near oil filter)
Parking brake switch (at base of park lever)
Pnk
Pointer diameter
Power circuit
Red
Right turn signal indicator
Seat belt reminder
Side airbag cut-off indicator
Srs indicator
Srs indicator circuit
Switch trip/reset
Trunk open indicator
Underdash fuse/relay box (under left side of dash)
Usa
Vss (except cvt) (on transaxle housing)
Washer fluid level switch (canada) (behind left side of front bumper)
Washer level indicator (canada)

Instrument Cluster Wiring Diagram, EX, HX, LX (2 of 2) for Honda Civic Si 2003

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List of elements for Instrument Cluster Wiring Diagram, EX, HX, LX (2 of 2) for Honda Civic Si 2003:

(vssout)
A11
A14
A18
B10
B12
B13
B17
B18
Bus (sefmj)
Canada
Coolant temperature gauge
Cpu
D11
Dimming circuit
Drive circuit
Driver
E24
E25
E26
E31
Ecm/ pcm (behind glove box)
Fuel gauge
Fuse 10a
Gauge assembly
Gauge lights
High beam indicator
Hot at all times
Mil cntrl
Odometer/trip lcd display
Pcm (behind glove box)
Rpm out (nep)
Sensor input
Speedometer
Tachometer
Test tachometer connector (right side of engine compt)
Underdash fuse/relay box (under left side of dash)
Underhood fuse/relay box (right side of engine compt)
Usa

Instrument Cluster Wiring Diagram, Hatchback (1 of 2) for Honda Civic Si 2003

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List of elements for Instrument Cluster Wiring Diagram, Hatchback (1 of 2) for Honda Civic Si 2003:

(under right side of dash)
A10
A11
A12
A13
A14
A15
A16
A17
A18
A19
A20
A21
A22
Abs indicator
Abs indicator circuit
Anti-lock brake system
B canada
B10
B11
B12
B13
B14
B15
B16
B17
B18
B19
B20
B21
B22
Beeper
Brake fluid level switch (on master cylinder reservoir)
Bus (brake)
Bus (ecu)
Bus (meter)
Charging system indicator
Cpu
Cruise control indicator
Cruise control system
Door indicator light
Drive circuit
Drl control unit (under left side of dash)
Drl indicator
E10
Eps control unit (under right side of dash)
Eps indicator
Exterior lights system
Fuel gauge sending unit
Fuel tank unit (on top of fuel tank)
Fuse 10a
Fuse 7.5a
G101 (top of engine)
G201 (right front of vehicle)
G301 (left front of vehicle)
G502
G551 (under passenger's seat)
Gauge assembly
Headlights system
Headlights system (canada)
Hot in on or start
Ig1 (meter)
Immobilizer control unit- receiver (in steering column cover)
Interior lights system
J/c c104 (on cylinder head cover)
K10
Left turn signal indicator
Low fuel indicator
Low oil pressure indicator
Maintenance required indicator
Malfunction indicator
Multiplex control unit
Oil pressure switch (near oil filter)
Parking brake & brake system indicator
Parking brake switch (at base of park lever)
Pnk
Power circuit
Red
Right turn signal indicator
Seat belt reminder
Side airbag indicator
Srs indicator
Srs indicator circuit
Switch trip/reset
Trunk indicator light
Underdash fuse/relay box (under left side of dash)
Usa a
Vss (on transaxle housing)
Washer fluid level switch (canada) (behind left side of front bumper)
Wiper/washer indicator (canada)

Instrument Cluster Wiring Diagram, Hatchback (2 of 2) for Honda Civic Si 2003

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List of elements for Instrument Cluster Wiring Diagram, Hatchback (2 of 2) for Honda Civic Si 2003:

(not used)
A10
A11
A18
B11
B12
B18
B19
Bus (sefmj)
C19
Coolant temperature gauge
Cpu
D11
Drive circuit
E24
E26
E31
Ecm (behind glove box)
Ect sensor (middle of engine)
Eps control unit (under right side of dash)
Fuel gauge
Fuse 10a
Gauge assembly
Gauge lights
Gauges & indicators
High beam indicator
Hot at all times
Immobilizer system indicator
Lcd back light
Mil cntrl
Odo/trip lcd back light stabilizing power circuit
Odometer/ trip display
Rpm out (nep)
Sensor input
Sns gnd (sg2)
Sns in (ect)
Speedometer
Tachometer
Test tachometer connector (right side of engine compt)
Underdash fuse/relay box (under left side of dash)
Underhood fuse/relay box (right side of engine compt)

Instrument Cluster Wiring Diagram, Hybrid (1 of 2) for Honda Civic Si 2003

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List of elements for Instrument Cluster Wiring Diagram, Hybrid (1 of 2) for Honda Civic Si 2003:

(canada)
(not used)
(under gauge assembly)
A10
A11
A12
A13
A14
A15
A16
A17
A18
A19
A20
A21
A22
Abs indicator
Abs indicator circuit
Air conditioning system
Anti-lock brakes system
B10
B11
B12
B13
B14
B15
B16
B17
B18
B19
B20
B21
B22
Brake fluid level switch (on master cylinder reservoir)
Brake level sw
Brake system indicator
Bus (ecu)
Bus (meter)
Canada
Charging system indicator
Cpu
Cruise control indicator
Cruise control system
Cvt
Door indicator light
Drive circuit
Drl control unit (under left side of dash)
Drl indicator
E10
Electronic power steering system
Engine controls system
Eps indicator
Exterior lights system
Exterior lights system (canada)
Fuel gauge sending unit
Fuel tank unit (on top of fuel tank)
Fuse 10a
Fuse 7.5a
G101 (at top left side of engine)
G301 (behind left side of front bumper)
G501
Gauge assembly
Headlights system
Hot in on or start
Ig1 (meter)
Ima system indicator
Immobilizer control unit- receiver (in steering column cover)
Interior lights system
Junction connector c106 (behind glove box)
Junction connector c110 (on middle of engine)
Junction connector c111 (on middle of engine)
K10
Lcd back light
Left turn signal indicator
Low fuel indicator
Low oil pressure indicator
M/t
Maintenance required indicator
Malfunction indicator
Multiplex control unit
O11
Odo/trip lcd circuit back light stabilizing power circuit
Oil pressure switch (near oil filter)
Parking brake switch (at base of park lever)
Pnk
Power circuit
Red
Right turn signal indicator
Rxd
Seat belt reminder
Side airbag cut-off indicator
Srs indicator
Srs indicator circuit
Trunk open indicator
Txd
Underdash fuse/relay box (under left side of dash)
Usa
Vehicle speed sensor (m/t) (on transaxle housing)
Washer fluid level switch (canada) (behind left side of front bumper)
Washer level indicator (canada)

Instrument Cluster Wiring Diagram, Hybrid (2 of 2) for Honda Civic Si 2003

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List of elements for Instrument Cluster Wiring Diagram, Hybrid (2 of 2) for Honda Civic Si 2003:

(behind right kick panel)
(engrdy)
(sefmj)
(under right
(vss out)
A13
A14
A16
A17
A18
A28
Auto idle stop indicator (m/t)
B10
B13
B14
B16
B19
B20
B21
B22
Beeper
C12
C13
C19
Canada
Collant temeeraturep gauge
Cpu
Cruise control system
D11
Dash lights brightness controller
Dimming cancel circuit
Dimming circuit
Down shift indicator (m/t)
Drive circuit
Driver circuit
E19
E26
E31
Ecm (behind glove box)
Eps control
Fuel consumption information
Fuel gauge
Fuse 10a
Gauge assembly
Gauge lights (5 leds)
High beam indicator
Hot at all times
Ima battery charge level gauge
Ima battery level gauge
Ima motor assist level gauge
Immobilizer system indicator
Mil cntrl
Mtra sig
Odo/trip indiactor
Red
Rpm out (nep)
Sensor input
Shift up indicator (m/t)
Side of dash)
Speedometer
Switch trip
Tachometer
Test tachometer connector (left side of engine compt)
Ti sig
Transmission control module (cvt)
Underdash fuse/relay box (under left side of dash)
Underhood fuse/relay box (on left side of engine compt)
Unit
Usa

INTERIOR LIGHTS

Courtesy Lamps Wiring Diagram, Coupe with Sunroof for Honda Civic Si 2003

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List of elements for Courtesy Lamps Wiring Diagram, Coupe with Sunroof for Honda Civic Si 2003:

(at middle of trunk) g601
Ceiling light
Ceiling light/spotlights
D/l sil-con sw
Door
Driver's door lock knob switch
Driver's door switch
Fr door switch
Fuse 3 7.5a
G401 (under gauge assembly)
G501 (under gauge assembly)
Hot at all times
Ignition key light
Ignition key switch
Ignition key switch/ key light
Intr lt-
Key sw
Keyless com
Keyless receiver unit
Multiplex control unit
Off
P18
Passenger's door switch
Rear ceiling light
Red
Security control unit connector (optional) (under left side of dash)
Spotlights
Trunk latch switch
Trunk light
Trunk switch
Underdash fuse/relay box (under left side of dash)
Underhood fuse/relay box (right side of engine compt)
X8 ig key lt-

Courtesy Lamps Wiring Diagram, Hatchback for Honda Civic Si 2003

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List of elements for Courtesy Lamps Wiring Diagram, Hatchback for Honda Civic Si 2003:

Cargo area light
Ceiling light/spotlights
Ceiling lights
Door
Driver's door switch
Fr door switch
Fuse 3 7.5a
G501 (under gauge assembly)
G552 (behind right rear seat back)
Hatch latch switch
Hatch switch
Hot at all times
Intr lt-
Multiplex control unit
Off
P18
Passenger's door switch
Rear ceiling light
Red
Security control unit connector
Spot- lights
Underdash fuse/relay box (behind left side of dash)
Underdash fuse/relay box (right side of engine compt)
Underhood fuse/relay box (right side of engine compt)

Courtesy Lamps Wiring Diagram, Hybrid for Honda Civic Si 2003

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List of elements for Courtesy Lamps Wiring Diagram, Hybrid for Honda Civic Si 2003:

Ceiling light
D/l sil-con sw (lock)
Door
Driver's door lock knob switch
Driver's door switch
Fr door sw (as)
Fr door sw (dr)
Front passenger's door switch
Fuse 10a
Fuse 7.5a
G401 (under gauge assembly)
G501 (under gauge assembly)
G601 (at middle of trunk)
Hot at all times
Hot in on or start
Ig key lt-
Ig1 meter
Ignition key light
Ignition key switch
Ignition key switch/key light (in steering column cover)
Intr lt-
Key sw
Left rear door switch
Multiplex control unit
Off
P18
Red
Right rear door switch
Rr door sw
Security control unit connector (optional) (under left side of dash)
Spotlights
Trunk latch switch
Trunk light
Trunk sw (t/g sw)
Underdash fuse/relay box (under left side of dash)
Underhood fuse/relay box (on left side of engine compt)

Courtesy Lamps Wiring Diagram, Sedan with Sunroof for Honda Civic Si 2003

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List of elements for Courtesy Lamps Wiring Diagram, Sedan with Sunroof for Honda Civic Si 2003:

(not used)
Ceiling light
Ceiling light/spotlights
Door
Driver's door lock knob switch
Driver's door switch
Fr door switch
Front passen- ger's door switch
Fuse 3 7.5a
G401 (under gauge assembly)
G501 (under gauge assembly)
G601 (at middle of trunk)
Hot at all times
Ignition key light
Ignition key switch
Ignition key switch/ key light
Intr lt-
Keyless com
Keyless receiver unit (under middle of dash)
Left rear door switch
Multiplex control unit
Off
P18
Rear ceiling light
Rear door switches
Red
Right rear door switch
Security control unit connector (optional) (under left side of dash)
Spot- lights
Trunk latch switch
Trunk light
Trunk switch
Underdash fuse/relay box (under left side of dash)
Underhood fuse/relay box (right side of engine compt)
X5 key sw
X8 key lt (-)
Y8 d/l sw

Courtesy Lamps Wiring Diagram, without Sunroof for Honda Civic Si 2003

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List of elements for Courtesy Lamps Wiring Diagram, without Sunroof for Honda Civic Si 2003:

(coupe) (sedan)
(sedan) (coupe)
(under gauge assembly) g501
Ceiling light
D/l sil-con sw
Door
Driver's door lock knob switch
Driver's door switch
Fr door switch
Front passenger's door switch
Fuse 3 7.5a
G401 (under gauge assembly)
G601 (at middle of trunk)
Hot at all times
Ignition key light
Ignition key switch
Ignition ley switch/key light
Intr lt-
Key lt
Key sw
Left rear door switch (sedan)
Multiplex control unit
Off
P18
Rear door switches
Red
Right rear door switch (sedan)
Security control unit connector (optional) (under left side of dash)
Sedan
Spotlights
Trunk latch switch
Trunk light
Trunk switch
Underdash fuse/relay box (under left side of dash)
Underhood fuse/relay box (right side of engine compt)

Instrument Illumination Wiring Diagram, Except Hybrid for Honda Civic Si 2003

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List of elements for Instrument Illumination Wiring Diagram, Except Hybrid for Honda Civic Si 2003:

(ex, hx, lx)
(gx, dx)
(hatchback)
(hatchback) (except hatchback)
(not used)
A11
A14
A16
A19
Audio unit
B11
B12
B16
B17
B18
C11
Combination light switch
Connector (optional) (under left side of dash)
Cpu
Cruise control main switch (except dx)
Except hatchback
Fuse 2 15a
G401 (under gauge assembly)
G501 (under gauge assembly)
Gauge assembly
Gauge lights
Gauges & indicators
Hazard warning switch
Head
Headlight switch
Heater control panel
Hot at all times
K17
L10
L5 l6
L6 l5
Lcd back light
Moonroof switch (ex)
Multiplex control unit
O10
Odo/trip lcd back light stabilizing power circuit
Off
Park
Park pin/ shift switch (behind a/t shift lever)
Power mirror switch (except dx)
Recirc-a/c- rear defogger switch assembly
Red
Security control unit
Small lt rly-
Taillight relay
Underdash fuse/relay box (under left side of dash)
Underhood fuse/relay box (right side of engine compartment)

Instrument Illumination Wiring Diagram, Hybrid for Honda Civic Si 2003

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List of elements for Instrument Illumination Wiring Diagram, Hybrid for Honda Civic Si 2003:

(not used)
(option connector)
A17
A19
Audio unit
B13
B16
B19
B21
B22
C11
Climate control unit
Combination light switch
Cpu
Cruise control main switch
Driver circuit
Fuse 3 10a
G401 (under gauge assembly)
G501 (under gauge assembly)
Gauge assembly
Gauge lights (5 leds)
Hazard warning switch
Head
Headlight switch
Hot at all times
Illum 1+
K11
K17
L10
Lcd back light
Multiplex control unit
O10
Odo/trip lcd back light stabilizing power circuit
Off
P11
Park
Park pin/ shift switch (cvt) (behind a/t shift lever)
Power mirror switch
Rear window defogger switch
Recir-a/c- econ switch assembly
Red
Security control unit connector (optional) (under left side of dash)
Small
Small lt rly-
Taillight relay
Underdash fuse/relay box (under left side of dash)
Underhood fuse/relay box (on left side of engine compartment)

POWER DISTRIBUTION

Power Distribution Wiring Diagram, Except Hybrid (1 of 4) for Honda Civic Si 2003

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List of elements for Power Distribution Wiring Diagram, Except Hybrid (1 of 4) for Honda Civic Si 2003:

(exc ex, hx, lx) a18 (ex, hx, lx) a16
(not used)
(right side of engine compartment) underhood fuse/relay box
A/c compressor clutch relay
A10
Abs modulator control unit (ex, gx)
Alternator
Audio unit
B10
Battery
Brake pedal position switch
C 1995 vftc
C10
Ceiling light
Ceiling light/ spotlights
Condenser fan relay
D11
Data link connector (dlc)
E12
Electrical load detector (eld) unit (usa)
Eps control unit
Exc ex, hx, lx)
Except hatchback
From battery a (diagram 1 of 4)
Fuse 10a
Fuse 15a
Fuse 20a
Fuse 40a
Fuse 60a
Fuse 7.5a
Fuse 80a
Gauge assembly
Hatchback
Hazard warning switch
Horn relay
Ignition key switch/ key light
Immobilizer control unit- receiver
Injector relay
K13
Keyless receiver unit
Multiplex control unit
O12
Pgm-fi main relay 1
Radiator fan relay
Rear ceiling light
Red
Spotlights
Starter
Starter solenoid
T101
T102
Taillight relay
To ignition switch (diagram 3 of 4)
To underhood fuse/relay box (fuse 13, 40a) (diagram 2 of 4)
To underhood fuse/relay box (fuse 5, 10a) (diagram 1 of 4)
To underhood fuse/relay box (headlight relay 2) (diagram 2 of 4)
Trunk light
Underdash fuse/relay box (under left side of dash)
Underhood fuse/relay box (right side of engine compartment)
W/ moonroof
W/o moonroof

Power Distribution Wiring Diagram, Except Hybrid (2 of 4) for Honda Civic Si 2003

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List of elements for Power Distribution Wiring Diagram, Except Hybrid (2 of 4) for Honda Civic Si 2003:

(hatchback) (except ex, hx, lx) (ex, hx, lx)
(not used)
(option connector)
(right side of engine compartment) underhood fuse/relay box
(sedan) (coupe)
A/f sensor relay
A1 b2 b10
Blower motor relay
C 1995 vftc
Canada
Canada (except hatchback)
Canada (hatchback)
Combination light switch
D14
Drl control unit
Drl relay
Exc dx
From underhood fuse/relay box b (fuse 9, 10a) (diagram 1 of 4)
From underhood fuse/relay box c (fuse 6, 15a) (diagram 1 of 4)
Fuse 10a
Fuse 11 30a 40a
Fuse 15a
Fuse 20a
Fuse 2a
Fuse 40a
Fuse 5 (not used)
Gauge assembly
Headlight relay
Hx, hatchback
Left headlight
Moonroof close relay
Moonroof open relay
Multiplex control unit
Rear window defogger relay
Red
Right headlight
Security control unit
Security control unit connector (optional)
To power window relay (diagram 4 of 4)
Underdash fuse/relay box (under left side of dash)
Underhood fuse/relay box (right side of engine compartment)
W/ accessory installed
W/o accessory installed

Power Distribution Wiring Diagram, Except Hybrid (3 of 4) for Honda Civic Si 2003

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List of elements for Power Distribution Wiring Diagram, Except Hybrid (3 of 4) for Honda Civic Si 2003:

(ex, hx, lx)
(exc ex, hx, lx)
(hatchback)
(hatchback) (other)
(not used)
(option connector)
(under left side of dash) underdash fuse/relay box
A/c compressor clutch relay
A/t
A/t reverse relay
A/t, except cvt
A14
A15
A17
Abs modulator control unit
Acc
Accessory power socket (behind front console, below radio)
Audio unit
Backup light switch (m/t)
Blower motor relay
C 1995 vftc
C10
Canada
Clutch interlock switch
Condenser fan relay
Cvt
D11
D12
Drl control unit
E11
Ecm/ pcm
Eps control unit
Except gx
From underdash fuse/relay box (diagram 1 of 4)
Fuse 10a
Fuse 15a
Fuse 20a
Fuse 21 (not used)
Fuse 7.5a
G502 (hatchback) (under right side of dash) (except hback) (under center of dash)
Gauge assembly
Hatch- back
Hazard warning switch
Heater control unit panel
Ignition switch
K12
K14
Keyless receiver unit (ex, hatchback)
Lock
M/t
Multiplex control unit
Opds unit
P12
Pgm-fi main relay
Power mirror switch (except dx)
Radiator fan relay
Rear window defogger relay
Rear window wiper intermittent control unit
Rear window wiper motor
Recirculation control motor
Security control unit connector (optional)
Shift lock solenoid
Srs unit
Start
Starter
Starter control relay
Starter cut relay
Starter solenoid
To under- dash fuse/ relay box (diagram 4 of 4)
Transmission range switch
Underdash fuse/relay box (under left side of dash)
Underhood fuse/relay box (right side of engine compartment)
Windshield wiper motor
Wiper/ washer switch

Power Distribution Wiring Diagram, Except Hybrid (4 of 4) for Honda Civic Si 2003

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List of elements for Power Distribution Wiring Diagram, Except Hybrid (4 of 4) for Honda Civic Si 2003:

(coupe)
(ex, hx)
(lx, dx, gx)
(not used) (except dx, hx)
(on cylinder head cover) j/c c104
(sedan)
(under left side of dash) underdash fuse/relay box
A/f sensor relay (hx, hatchback)
Alternator
C 1995 vftc
Cmp sensor
Coupe lx, ex
Cruise control actuator
Cruise control main switch
Cruise control unit
Eld unit
Evap bypass solenoid valve
Evap canister purge valve
Evap canister vent shut valve
Except dx
Except dx, hx
Except gx, hatchback
From underdash f fuse/relay box (diagram 3 of 4)
From underdash fuse/relay box (diagram 2 of 4)
Front passenger's or passenger's power window motor
Fuse 10a
Fuse 15a
Fuse 20a
Fuse 7.5a
G301 (except hatchback) (behind left side of front bumper) g201 (hatchback) (behind right side of front bumper)
Hatchback
Hatchback, except cvt
Hatchback, except gx
If equipped
Ignition coil 1
Ignition coil 2
Ignition coil 3
Ignition coil 4
J/c c104 (on cylinder head cover)
Left rear power window switch (sedan exc dx)
Lx, dx, gx, hx
M10
M11
Moonroof close relay
Moonroof control unit
Moonroof open relay
P10
P13
Power window master switch
Power window master switch (sedan, except dx)
Power window relay
Primary ho2s
Right rear power window switch (sedan exc dx)
Secondary ho2s
Secondary ho2s (ex, hatchback) third ho2s (hx)
Sedan/coupe
Underdash fuse/relay box
Underhood fuse/relay box (right side of engine compartment)
Usa
Usa hx & sedan lx, ex, gx, hatchback
Vss

Power Distribution Wiring Diagram, Hybrid (1 of 4) for Honda Civic Si 2003

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List of elements for Power Distribution Wiring Diagram, Hybrid (1 of 4) for Honda Civic Si 2003:

A/c compressor clutch relay
A/c condenser fan relay
A/t
A10
Acc
Audio unit
B+ back up
B18
Battery
Ceiling light
D11
Dc-dc converter
Dlc
E12
Electrical load detector unit
Fuse 10a
Fuse 15a
Fuse 20a
Fuse 50a
Fuse 80a
Gauge assembly
Headlight relay 1
Headlight relay 2
Ignition key switch/ key light
Ignition switch
Immobilizer control unit- receiver
K13
Keyless receiver unit
Lock
Mcm relay 2
Motor control module
Multiplex control unit
Pgm-fi main relay 1
Radiator fan relay
Spotlights
Start
Starter
Starter solenoid
T101
Taillight relay
Tcm
To fuse 10 (diagram 3 of 4)
To fuse 13 (diagram 2 of 4)
To fuse 14 (diagram 3 of 4)
To fuse 21 (diagram 3 of 4)
To fuse 5 (diagram 2 of 4)
To fuse 8 (diagram 3 of 4)
Trunk light
Underdash fuse/relay box (under left side of dash)
Underhood fuse/relay box (on left side of engine compt)

Power Distribution Wiring Diagram, Hybrid (2 of 4) for Honda Civic Si 2003

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List of elements for Power Distribution Wiring Diagram, Hybrid (2 of 4) for Honda Civic Si 2003:

(diagram 1 of 4)
(not used)
A/f sensor relay
Abs modulator control unit
B+ day lt
B+ door lock
B+ rr fog
Blower motor relay
Brake pedal position switch
C10
D14
Drl control unit (canada)
Eps control unit
F11
From battery a (diagram 1 of 4)
From fuse 9 b
Fuse (not used)
Fuse 10a
Fuse 10a (accessory installed)
Fuse 15a
Fuse 20a
Fuse 30a
Fuse 40a
Fuse 5 (not used)
Fuse 60a
Fuse 7.5a
Hazard warning switch
Horn relay
Hot restart fan relay
Mcm relay 1
Multi-fuse/ relay box (on left side of engine compt)
Multiplex control unit
O12
Option connector
Power window relay
Rear window defogger relay
Security control unit connector (optional)
Underdash fuse/relay box (under left side of dash)
Underhood fuse/relay box (on left side of engine compartment)

Power Distribution Wiring Diagram, Hybrid (3 of 4) for Honda Civic Si 2003

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List of elements for Power Distribution Wiring Diagram, Hybrid (3 of 4) for Honda Civic Si 2003:

(not used)
(under left side of dash) underdash fuse/relay box
A/c compressor clutch relay
A/c condenser fan relay
A/t
A/t reverse relay
A10
A30
Abs modulator control unit
Acc
Audio unit
B17
Back-up light switch (m/t)
Blower motor relay
C10
Canada
Cigarette lighter or accessory power socket
Climate control unit
D11
Drl control unit (canada)
E11
Ecm
Eps control unit
From ignition switch (diagram 1 of 4)
Fuse 10a
Fuse 15a
Fuse 7.5a
G502 (behind right side of dash)
Gauge assembly
Ig1 meter
Ig2 day lt
Junction connector c110 (on middle of engine)
Keyless receiver unit
Mcm
Multiplex control unit
Option connector
P12
Power mirror switch
Radiator fan relay
Rear ignition coil 1
Rear ignition coil 2
Rear ignition coil 3
Rear ignition coil 4
Rear window defogger relay
Rear window defogger switch
Recirculation control motor
Red
Security control unit connector (optional)
Shift lock solenoid
Srs unit
Starter cut relay
To fuse 17 (diagram 4 of 4)
Underhood fuse/relay box (on left side of engine compartment)

Power Distribution Wiring Diagram, Hybrid (4 of 4) for Honda Civic Si 2003

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List of elements for Power Distribution Wiring Diagram, Hybrid (4 of 4) for Honda Civic Si 2003:

(diagram 3 of 4)
(diagram 4 of 4)
(not used)
(under left side of dash) underdash fuse/relay box
A/f sensor relay
A10
A22
C11
Cruise control main switch
Cruise control unit
D12
Dc-dc converter
Ecm
Eld unit
Evap bypass solenoid valve
Evap canister purge valve
Evap canister vent shut valve
From fuse 10 f
From fuse 19 h
Front ignition coil 1
Front ignition coil 2
Front ignition coil 3
Front ignition coil 4
Fuse 10a
Fuse 15a
Fuse 20a
Fuse 7.5a
Hazard warning switch
Ig1 wiper
Immobilizer control unit- receiver
Junction connector c110 (on middle of engine)
K12
K14
Multi-fuse/ relay box (on left side of engine compt)
Multiplex control unit
Opds unit
Pgm-fi main relay 2
Power window relay
Secondary ho2s
Side airbag
Srs unit
Tcm (a/t)
Third ho2s
To fuse 1 (diagram 4 of 4)
Underdash fuse/relay box (under left side of dash)
Underhood fuse/relay box (on left side of engine compt)
Vss (m/t)
Windshield wiper motor
Wiper/ washer switch

POWER DOOR LOCKS

Door Lock Wiring Diagram, Hatchback for Honda Civic Si 2003

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List of elements for Door Lock Wiring Diagram, Hatchback for Honda Civic Si 2003:

D11
D14
Driver's door lock actuator
Driver's door lock knob switch
Driver's door lock switch
Driver's door switch
Fuse 10a
Fuse 20a
Fuse 7.5a
G201 (right front of vehicle)
G401 (under gauge assembly)
G501 (under gauge assembly)
G502 (under middle of dash)
G552 (behind right rear seat back)
Ground
Hatch latch switch
Hatch lock actuator
Horns system
Hot at all times
Hot in on or start
Ignition key switch
Ignition key switch/key light
K13
Keyless receiver unit (under middle of dash)
Lock
Multiplex control unit
P16
P17
P18
Passenger's door lock actuator
Passenger's door switch
Red
Security control unit connector (optional)
Trunk switch
Underdash fuse/relay box (under left side of dash)
Underhood fuse/relay box (right side of engine compartment)
Unlock
Y10
Y12

Power Door Locks Wiring Diagram, Except Hatchback & Hybrid for Honda Civic Si 2003

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List of elements for Power Door Locks Wiring Diagram, Except Hatchback & Hybrid for Honda Civic Si 2003:

Coupe
Coupe sedan
D11
D14
Driver's door lock actuator
Driver's door lock knob switch
Driver's door lock switch
Driver's door switch
Exterior lights system (hx, lx, gx w/ keyless entry)
Front passenger's or passenger's door lock actuator
Front passenger's or passenger's door switch
Fuse 10a
Fuse 15a
Fuse 20 20a
Fuse 20a
Fuse 2a
Fuse 7.5a
G301 (behind left side of front bumper)
G401 (under gauge assembly)
G451 (under middle of dash)
G501 (under gauge assembly)
G502 (under middle of dash)
Ground
Horns system
Hot at all times
Hot in on or start
Hx, lx, gx w/ keyless entry
Ignition key switch
Ignition key switch/key light (in steering column cover)
K13
Keyless receiver fuse 1
Keyless receiver fuse 2
Keyless receiver unit (under middle of dash)
Left rear door lock actuator (sedan)
Left rear door switch (sedan)
Lock
Multiplex control unit
P16
P17
P18
Red
Right rear door lock actuator (sedan)
Right rear door switch (sedan)
Security control unit connector (optional)
Sedan
Trunk latch switch
Trunk light
Trunk switch
Underdash fuse/relay box (under left side of dash)
Underhood fuse/relay box (right side of engine compartment)
Unlock
Wiper/washer system (hx, lx, gx w/ keyless entry)
Y10
Y12

Power Door Locks Wiring Diagram, Hybrid for Honda Civic Si 2003

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List of elements for Power Door Locks Wiring Diagram, Hybrid for Honda Civic Si 2003:

+b back up
+b door lock
D/l dr mtr (unlock)
D/l mtr (lock)
D/l mtr (unlock)
D/l remote sw (lock)
D/l remote sw (unlock)
D/l sil-con sw (unlock)
D11
D14
Driver's door lock actuator
Driver's door lock knob switch
Driver's door lock switch
Driver's door switch
Fr door sw (as)
Fr door sw (dr)
Front passenger's door lock actuator
Front passenger's door switch
Fuse 10a
Fuse 20a
Fuse 7.5a
G301 (behind left side of front bumper)
G401 (under gauge assembly)
G501 (under gauge assembly)
G502 (behind right side of dash)
G601 (at middle of trunk)
Ground
Horn sw
Horns system
Hot at all times
Hot in on or start
Ig1 meter
Ignition key switch
Ignition key switch/key light (in steering column cover)
K/l set
K/l unset
K13
Key sw
Keyless com
Keyless receiver unit (under middle of dash)
Left rear door lock actuator
Left rear door switch
Lock
Multiplex control unit
P16
P17
P18
Red
Right rear door lock actuator
Right rear door switch
Rr door sw
Security control unit connector (optional)
Trunk latch switch
Trunk light
Trunk sw (t/g sw)
Underdash fuse/relay box (under left side of dash)
Underhood fuse/relay box (on left side of engine compartment)
Unlock
Y10
Y12

POWER MIRRORS

Power Mirrors Wiring Diagram, with Defogger Except Hatchback & Hybrid for Honda Civic Si 2003

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List of elements for Power Mirrors Wiring Diagram, with Defogger Except Hatchback & Hybrid for Honda Civic Si 2003:

10a
Defogger
Defogger switch
Fuse 14
G501 (under gauge assembly)
G502 (under middle of dash)
Hot in on
Interior lights system
Left
Left dn
Left power mirror
Left up
Left/ right motor
Power mirror switch
Power mirror switch light
Red
Right
Right down
Right power mirror
Right up
Switch 1
Switch 2
Switch 3
Underdash fuse/relay box (under left side of dash)
Up/ down motor

Power Mirrors Wiring Diagram, with Defogger Hatchback for Honda Civic Si 2003

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List of elements for Power Mirrors Wiring Diagram, with Defogger Hatchback for Honda Civic Si 2003:

10a
Defogger
Defogger switch
Fuse 14
G501 (under gauge assembly)
G502 (under right side of dash)
Hot in on
Interior lights system
Left
Left power mirror
Left/ right motor
Pnk
Power mirror switch
Power mirror switch light
Red
Right
Right power mirror
Underdash fuse/relay box (under left side of dash)
Up/ down motor

Power Mirrors Wiring Diagram, with Defogger Hybrid for Honda Civic Si 2003

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List of elements for Power Mirrors Wiring Diagram, with Defogger Hybrid for Honda Civic Si 2003:

Defogger
Defogger switch
Fuse 14 10a
G501 (under gauge assembly)
G502 (behind right side of dash)
Hot in on
Interior lights system
Left
Left dn
Left power mirror
Left up
Left/ right motor
Power mirror switch
Power mirror switch light
Red
Right
Right dn
Right power mirror
Right up
Switch 1
Switch 2
Switch 3
Underdash fuse/relay box (under left side of dash)
Up/ down motor

Power Mirrors Wiring Diagram, without Defogger Except Hatchback & Hybrid for Honda Civic Si 2003

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List of elements for Power Mirrors Wiring Diagram, without Defogger Except Hatchback & Hybrid for Honda Civic Si 2003:

10a
Fuse 14
G501 (under gauge assembly)
Hot in on
Interior lights system
Left
Left down
Left power mirror
Left up
Left/ right motor
Power mirror switch
Power mirror switch light
Red
Right
Right down
Right power mirror
Right up
Switch 1
Switch 2
Switch 3
Underdash fuse/relay box (under left side of dash)
Up/ down motor

Power Mirrors Wiring Diagram, without Defogger Hatchback for Honda Civic Si 2003

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List of elements for Power Mirrors Wiring Diagram, without Defogger Hatchback for Honda Civic Si 2003:

10a
Fuse 14
G501 (under gauge assembly)
Hot in on
Interior lights system
Left
Left power mirror
Left/ right motor
Pnk
Power mirror switch
Power mirror switch light
Red
Right
Right power mirror
Underdash fuse/relay box (under left side of dash)
Up/ down motor

Power Mirrors Wiring Diagram, without Defogger Hybrid for Honda Civic Si 2003

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List of elements for Power Mirrors Wiring Diagram, without Defogger Hybrid for Honda Civic Si 2003:

Fuse 14 10a
G501 (under gauge assembly)
Hot in on
Interior lights system
Left
Left down
Left power mirror
Left up
Left/ right motor
Power mirror switch
Power mirror switch light
Red
Right
Right down
Right power mirror
Right up
Switch 1
Switch 2
Switch 3
Underdash fuse/relay box (under left side of dash)
Up/ down motor

POWER TOP/SUNROOF

Power Top/Sunroof Wiring Diagram, Except Hatchback for Honda Civic Si 2003

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List of elements for Power Top/Sunroof Wiring Diagram, Except Hatchback for Honda Civic Si 2003:

(rear of moon roof)
Close
Close or tilt
Fuse 6 7.5a
Fuse 7 20a
G501 (under gauge assembly)
Hot at all times
Hot in on or start
Interior lights system
Moon roof close relay (rear of moon roof)
Moon roof limit switch (rear of moon roof)
Moon roof motor
Moon roof open relay (rear of moon roof)
Moon roof switch
Moon roof switch lights
Open
Red
Tilt
Underdash fuse/relay box (under left side of dash)

Power Top/Sunroof Wiring Diagram, Hatchback for Honda Civic Si 2003

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List of elements for Power Top/Sunroof Wiring Diagram, Hatchback for Honda Civic Si 2003:

Auto- stop
Close
Close open
Fuse 6 7.5a
Fuse 7 20a
G501 (under gauge assembly)
Hot at all times
Hot in on or start
Moonroof auto-stop switch
Moonroof close relay (rear of moonroof)
Moonroof control unit
Moonroof limit switch
Moonroof motor (rear of moonroof)
Moonroof open relay (rear of moonroof)
Moonroof switch
Open
Tilt
Underdash fuse/relay box (under left side of dash)

POWER WINDOWS

Power Windows Wiring Diagram, Except Hatchback & Hybrid for Honda Civic Si 2003

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List of elements for Power Windows Wiring Diagram, Except Hatchback & Hybrid for Honda Civic Si 2003:

(coupe)
(sedan)
40a
Auto dn
Coupe
Driver's power window motor
Driver's switch
Front pass- enger's power window motor
Front pass- enger's power window switch
Front passenger's power window switch
Fuse 13
Fuse 22 20a
Fuse 23 20a
Fuse 24 20a (sedan)
Fuse 25 20a (sedan)
Fuse 6 7.5a
G301 (behind left side of front bumper)
G501 (under gauge assembly)
Hot at all times
Hot in on or start
Left rear power window motor (sedan)
Left rear power window switch
Left rear power window switch (sedan)
M10
M11
Main switch
Off
Off on
P10
P13
Power window control unit
Power window master switch
Power window relay
Red
Right rear power window motor (sedan)
Right rear power window switch
Right rear power window switch (sedan)
Sedan
Underdash fuse/relay box (under left side of dash)
Underhood fuse/relay box (right side of engine compt)

Power Windows Wiring Diagram, Hatchback for Honda Civic Si 2003

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List of elements for Power Windows Wiring Diagram, Hatchback for Honda Civic Si 2003:

40a
Auto dn
Auto up
Driver's switch
Driver's window motor
Fuse 13
Fuse 22 20a
Fuse 23 20a
Fuse 6 7.5a
G301 (left front of vehicle)
G501 (under guage assembly)
Hot at all times
Hot in on or start
M10
M11
Main switch
Off
Passenger's power window motor
Passenger's power window switch
Power window control unit
Power window master switch
Power window relay
Pulser
Red
Underdash fuse/relay box (behind left side of dash)
Underhood fuse/relay box (left side of engine compt)

Power Windows Wiring Diagram, Hybrid for Honda Civic Si 2003

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List of elements for Power Windows Wiring Diagram, Hybrid for Honda Civic Si 2003:

40a
Auto dn
Driver's power window motor
Driver's switch
Front pass- enger's power window switch
Front passenger's power window motor
Front passenger's power window switch
Fuse 13
Fuse 22 20a
Fuse 23 20a
Fuse 24 20a
Fuse 25 20a
Fuse 6 7.5a
G301 (behind left side of front bumper)
G501 (under gauge assembly)
Hot at all times
Hot in on or start
Left rear power window motor
Left rear power window switch
M10
M11
Main switch
Off
P10
P13
Power window control unit
Power window master switch
Power window relay
Red
Right rear power window motor
Right rear power window switch
Underdash fuse/relay box (under left side of dash)
Underhood fuse/relay box (on left side of engine compt)

RADIO

Radio Wiring Diagram, Coupe for Honda Civic Si 2003

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List of elements for Radio Wiring Diagram, Coupe for Honda Civic Si 2003:

A1 a2 a3 a4
A10
A11
A12
A13 a14 a15
A16 a17
A18 a19 a20
Antenna in
Antenna lead
Antenna module (inside right "c" pillar)
Audio unit
B10
B11
B12
B13
B14
Batt power
Cd changer (accessory installed)
Coil assembly
D11
Defogger system
Driver's door speaker
Fl +
Fl -
Fr +
Fr -
Fuse 8 7.5a
Fuse 9 10a
G503 (under right side of dash)
G701 (at left "c" pillar)
Ground
Hot at all times
Hot in acc or on
Illum +
Illum -
Interior lights system
Left rear speaker (except gx)
Left tweeter
Multiplex control unit
Nca
Passenger's door speaker
Pnk
Rear window
Rear window defogger (fm antenna)
Red
Right rear speaker (except gx)
Right tweeter
Rl +
Rl -
Rr +
Rr -
Sub-antenna lead
Sw ign
Sw out
Underdash fuse/relay box (under left side of dash)
Underhood fuse/relay box (right side of engine compartment)
Usa: ex
Window antenna (am)

Radio Wiring Diagram, Hatchback for Honda Civic Si 2003

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List of elements for Radio Wiring Diagram, Hatchback for Honda Civic Si 2003:

A1 a2 a3 a4
A10
A11
A12
A13 a14 a15
A16 a17
A18 a19 a20
Antenna in
Antenna lead
Antenna module
Audio unit
B10
B11
B12
B13
Batt power
Cd changer
Control unit multiplex
D11
Driver's door speaker
Fl +
Fl -
Fr +
Fr -
Fuse 8 7.5a
Fuse 9 10a
G503 (under right side of dash)
Ground
Hot at all times
Hot in acc or on
Illum +
Illum -
Interior lights system
Left rear speaker
Left tweeter
Passenger's door speaker
Pnk
Red
Right rear speaker
Right tweeter
Rl +
Rl -
Rr +
Rr -
Sw ign
Sw out
Underdash fuse/relay box (under left side of dash)
Underhood fuse/relay box (right side of engine compartment)

Radio Wiring Diagram, Hybrid for Honda Civic Si 2003

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List of elements for Radio Wiring Diagram, Hybrid for Honda Civic Si 2003:

+b backup
A10
A11
A12
A13
A14
A15
A16
A17
A18
A19
A20
Acc
Antenna in
Audio unit
B10
B11
B12
B13
B14
Battery in
Cd changer (if equipped)
D11
Driver's door speaker
Front passenger's door speaker
Fuse 8 7.5a
Fuse 9 10a
G503 (under middle of dash)
Ground
Hot at all times
Hot in acc or on
Illum +
Illum -
Interior lights system
Left rear speaker
Lf +
Lf -
Lr +
Lr -
Mast antenna
Multiplex control unit
Nca
Pnk
Red
Rf +
Rf -
Right rear speaker
Rr +
Rr -
Sw ign
Underdash fuse/relay box (under left side of dash)
Underhood fuse/relay box (on left side of engine compartment)

Radio Wiring Diagram, Sedan for Honda Civic Si 2003

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List of elements for Radio Wiring Diagram, Sedan for Honda Civic Si 2003:

b1 b2
A1 a2 a3 a4
A10
A11
A12
A13 a14 a15
A16 a17
A18 a19 a20
Antenna in
Antenna lead
Audio unit
B11
B12
B13 b14
B3 b4 b5 b6 b7 b8
B9 b10
Batt power
Cd changer (accessory installed)
D11
Driver's door speaker
Fl +
Fl -
Fr +
Fr -
Front passenger's door speaker
Fuse 8 7.5a
Fuse 9 10a
G503 (under right side of dash)
Ground
Hot at all times
Hot in acc or on
Illum +
Illum -
Interior lights system
Left rear speaker (except gx)
Multiplex control unit
Nca
Pnk
Radio antenna shield ground (right rear of roof)
Red
Right rear speaker (except gx)
Rl +
Rl -
Rr +
Rr -
Sub-antenna lead
Sw ign
Underdash fuse/relay box (under left side of dash)
Underhood fuse/relay box (right side of engine compartment)
Window antenna

SHIFT INTERLOCK

Shift Interlock Wiring Diagram, Except Hybrid for Honda Civic Si 2003

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List of elements for Shift Interlock Wiring Diagram, Except Hybrid for Honda Civic Si 2003:

(except hx,lx,ex) (hx,lx,ex)
(not used)
Atp-p
B5 b7
Bksw
Brake pedal position switch (under left side of dash)
Cvt
D10
E13
E22
Ecm/pcm (behind glove box)
Except cvt
Fuse 15a
Fuse 7.5a
G101 (at top right rear side of engine)
G301 (behind left side of front bumper)
G401 (under gauge assembly)
Gauge assembly
Hot at all times
Hot in on or start
Ig1 meter
Ignition key switch
Ignition key switch/ key light (in steering column cover)
Ilu
Interior lights system
Key intelock solenoid
Key solenoid output
Key switch input
Multiplex control unit
O12
Park pin/ shift switch (behind a/t shift lever)
Park pin/shift switch
Red
Shift lock solenoid (behind a/t shift lever)
Stop light
Transmission range switch (on transaxle housing)
Underdash fuse/relay box (under left side of dash)
Underhood fuse/relay box (right side of engine compt)

Shift Interlock Wiring Diagram, Hybrid for Honda Civic Si 2003

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List of elements for Shift Interlock Wiring Diagram, Hybrid for Honda Civic Si 2003:

(not used)
A26
Atp-p
B10
B21 interlock ctrl out
Brake pedal position switch (under left side of dash)
D10
E13
E22
Ecm (behind glove box)
Fuse 15a
Fuse 7.5a
G101 (at top left side of engine)
G301 (behind left side of front bumper)
G401 (under gauge assembly)
Gauge assembly
Gnd
Hot at all times
Hot in on or start
Ig1 meter
Ignition key switch
Ignition key switch/ key light (in steering column cover)
Ilu
Interior lights system
Junction connector c111 (on middle of engine)
Key intelock solenoid
Key lock sol +
Key sw
Multiplex control unit
O12
P pin sw
Park pin/ shift switch (behind a/t shift lever)
Red
Security control unit connector (optional)
Shift lock sol
Shift lock solenoid (behind a/t shift lever)
Sw in
T5 (thermal joint)
Transmission control module (behind right kick panel)
Transmission range switch (on transaxle housing)
Underdash fuse/relay box (under left side of dash)
Underhood fuse/relay box (on left side of engine compt)

STARTING/CHARGING

Charging Wiring Diagram, Hatchback for Honda Civic Si 2003

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List of elements for Charging Wiring Diagram, Hatchback for Honda Civic Si 2003:

Alternator
Alternator cntrl sig
Alternator fr signal
Alternator l signal
B10
B13
B18
Battery
Bus
Comm line
Control unit
Cpu
Driver circuit
E10
E15
E24
Ecm/pcm (behind glove box)
Eld unit
Eld unit input
Fuse 10a
Fuse 7.5a
Fuse 80a
G1 (left side of engine compt)
G201 (right front of vehicle)
Gauge assembly
Hot in on or start
J/c c104 (on cylinder head cover)
K10
Multiplex
T101
T102
Under- dash fuse/ relay box (under left side of dash)
Under- hood fuse/ relay box (on right side of engine compt)

Charging Wiring Diagram, without Hatchback for Honda Civic Si 2003

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List of elements for Charging Wiring Diagram, without Hatchback for Honda Civic Si 2003:

(usa & canada ex)
(usa) eld unit
A15
A17
Alternator
Alternator ctrl sig
Alternator fr signal
Alternator l signal
B10
B13
B18
Battery
Bus
Charge ind
Comm line
Cpu
Driver circuit
E10
E15
E24
Ecm/pcm (behind glove box)
Eld unit input
Except hx, lx, ex
Fuse 10a
Fuse 7.5a
Fuse 80a
G1 (right side of engine compt)
G201 (behind right side of front bumper)
Gauge assembly
Hot in on or start
Hx, lx, ex
Junction connector c104 (on cylinder head cover)
K10
Multiplex control unit
Starting circuit
T101
T102
Transmission
Under- dash fuse/ relay box (under left side of dash)
Under- hood fuse/ relay box (on right side of engine compt)
Usa

Starting Wiring Diagram, Hatchback for Honda Civic Si 2003

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List of elements for Starting Wiring Diagram, Hatchback for Honda Civic Si 2003:

(canada)
Acc (i)
Battery
Clutch interlock switch (under left side of dash)
Eld unit
Fuse 19 80a
Fuse 20 40a 50a
G1 (left side of engine comp)
G501 (under gauge assembly)
Ignition switch
Lock (0)
On (ii)
Start (iii)
Starter
Starter cut relay
Starter motor
Starter solenoid
Underdash fuse/relay box (under left side of dash)
Underhood fuse/relay box (on right side of engine compartment)

Starting Wiring Diagram, Hybrid for Honda Civic Si 2003

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List of elements for Starting Wiring Diagram, Hybrid for Honda Civic Si 2003:

Acc
Battery
Ctrl (stc)
E11
Ecm (behind glove box)
Eld unit
Fuse 19 80a
Fuse 20 50a
Fuse 7.5a
G1 (at left front corner of engine compt)
Ignition switch
Input (sts)
Lock
Start
Start c14
Start c4
Starter
Starter cut relay (in underdash fuse/relay box)
Starter motor
Starter solenoid
Transmission
Underdash fuse/relay box (under left side of dash)
Underhood fuse/relay box (on left side of engine compartment)

Starting Wiring Diagram, without Hatchback for Honda Civic Si 2003

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List of elements for Starting Wiring Diagram, without Hatchback for Honda Civic Si 2003:

(not
A/t w/o gx, hx
Acc
Battery
Clutch interlock switch (under left side of dash)
Cvt w/ gx, hx
E11
E20
Eld unit (usa)
Except gx
Fuse 19 80a
Fuse 20 40a
Fuse 21 (not used)
G1 (at right side of engine compt)
G101 (at top right rear side of engine)
G401 (under gauge assembly)
Ignition switch
J/c c103 (on cylinder head cover)
Junction connector c102 (behind glove compartment)
Lock
M/t
Pcm (behind glove box)
Relay control
Start
Starter
Starter control relay (behind glove box)
Starter cut relay
Starter motor
Starter solenoid
Transmission
Transmission range switch (on transaxle housing)
Underdash fuse/relay box (under left side of dash)
Underhood fuse/relay box (on right side of engine compartment)
Used)

SUPPLEMENTAL RESTRAINTS

Supplemental Restraints Wiring Diagram, Except Hatchback (1 of 2) for Honda Civic Si 2003

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List of elements for Supplemental Restraints Wiring Diagram, Except Hatchback (1 of 2) for Honda Civic Si 2003:

(under front passenger's seat) g551
A10
A11
A12
A13
A14
A15
A16
A17
A18
Anti-theft system
B10
B11
B12
B13
B14
B15
B16
B17
B18
Bsdh
Bsdl
Bsph
Bspl
Buck- led
Cable reel
Diag-h
Dlc (partial) (under middle of dash)
Driver belt sw
Driver's air bag first & second inflators
Driver's seat belt buckle tensioner (under driver's seat)
Driver's seat belt switch
Driver's side air bag inflator (w/side air bag)
Driver's side impact sensor (w/side air bag) (left side of floor, near left "b" pillar)
Front passenger's (or passenger's) seat belt buckle tensioner (under passenger's seat)
Front passenger's (or passenger's) side impact sensor (w/side air bag) (right side of floor, near right "b" pillar)
Front passenger's or passenger's side air bag inflator (w/side air bag)
Front passenger's seat belt switch (or passenger's seat belt switch)
Frsl
Frsr
Fuse 10a
Fuse 15a
G402 (under center console)
G551 (under front passenger's seat)
Gnd 1
Gnd 2
Hot in on or start
Ign in
Mes con
Mes connector (under left side of dash)
Multiplex control unit
Odus
P14
Pnk
Red
Sadc1
Sadc2
Sadh1
Sadh2
Sapc1
Sapc2
Saph1
Saph2
Sbdc
Sbdh
Sbpc
Sbph
Scs
Sdg
Sdv
Short contact
Spg
Splc
Splh
Sprc
Sprh
Spv
Srs ind
Srs unit (under middle of dash)
Ssdc
Ssdh
Sspc
Ssph
Steering wheel
Un- buck led
Underdash fuse/relay box (under left side of dash)

Supplemental Restraints Wiring Diagram, Except Hatchback (2 of 2) for Honda Civic Si 2003

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List of elements for Supplemental Restraints Wiring Diagram, Except Hatchback (2 of 2) for Honda Civic Si 2003:

(under gauge assenbly) g501
A15
B11
Driver's seat belt tensioner
Front passenger's (or passenger's seat belt tensioner)
Front passenger's (or passenger's) air bag first & second inflators
Fuse 10a
Fuse 7.5a
G402 (under center console)
G551 (under front passenger's seat)
Gauge assembly
Gnd
Hot in on or start
Left front impact sensor (behind left side of front bumper)
Lower element (lower 4 sensors in seat back)
Odus
Opds sensor (w/side air bag)
Opds unit (w/side airbag) (in front passenger's seat)
P12
Pnk
Pow
Red
Right front impact sensor (behind right side of front bumper)
Sb1l, sb1s
Sb2l, sb2s
Sb3l, sb3s
Sb4l, sb4s
Sb5l, sb5s
Sb6l, sb6s
Short contact
Side airbag cut-off indicator
Side element (right side of seat back)
Srs indicator
Srs indicator circuit
Ss1l, ss1s
Underdash fuse/relay box (under left side of dash)
Upper element (upper 2 sensors in seat back)
Wrn

Supplemental Restraints Wiring Diagram, Hatchback (1 of 2) for Honda Civic Si 2003

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List of elements for Supplemental Restraints Wiring Diagram, Hatchback (1 of 2) for Honda Civic Si 2003:

(dlc) (partial) (under left side of dash)
(under passenger's seat) g551
A10
A11
A12
A13
A14
A15
A16
A17
A18
Anti-theft system
B10
B11
B12
B13
B14
B15
B16
B17
B18
Bsdh
Bsdl
Bsph
Bspl
Buck- led
Cable reel
Data link connector
Diag-h
Driver belt sw
Driver's air bag first inflator
Driver's air bag second inflator
Driver's seat belt buckle tensioner (under driver's seat)
Driver's seat belt switch (under driver's seat)
Driver's side air bag inflator (w/side air bag) (under driver's seat)
Driver's side impact sensor (w/side air bag) (left side of floor)
Frsl
Frsr
Fuse 10a
Fuse 15a
G402 (under right side of dash)
G551 (under passenger's seat)
Gnda
Gndb
Hot in on or start
Ign in
Mes con
Mes connector (under left side of dash)
Multiplex control unit
Odus
P14
Passenger's seat belt buckle tensioner (under passenger's seat)
Passenger's seat belt switch (under passenger's seat)
Passenger's side air bag inflator (w/side air bag) (under passenger's seat)
Passenger's side impact sensor (w/side air bag) (right side of floor,
Pnk
Red
Sadc1
Sadc2
Sadh1
Sadh2
Sapc1
Sapc2
Saph1
Saph2
Sbplc
Sbplh
Sbprc
Sbprh
Scs
Sdg
Sdv
Short contact
Spg
Spv
Srplc
Srplh
Srprc
Srprh
Srs ind
Srs unit (under middle of dash)
Ssdc
Ssdh
Sspc
Ssph
Steering wheel
Un- buck led
Underdash fuse/relay box (under left side of dash)

Supplemental Restraints Wiring Diagram, Hatchback (2 of 2) for Honda Civic Si 2003

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List of elements for Supplemental Restraints Wiring Diagram, Hatchback (2 of 2) for Honda Civic Si 2003:

(under right side of dash) g502
A14
A15
B12
Driver's seat belt tensioner (left "b" pillar)
Fuse 10a
Fuse 7.5a
G402 (under right side of dash)
G551 (under passenger's seat)
Gauge assembly
Gnd
Hot in on or start
Left front impact sensor (behind left side of front bumper)
Lower element (lower 4 sensors in seat back)
Odus
Opds sensor (w/side air bag)
Opds unit (w/side airbag) (in passenger's seat)
P12
Passenger's air bag first inflator (under right side of dash)
Passenger's air bag second inflator (under right side of dash)
Passenger's seat belt tensioner (right "b" pillar)
Pnk
Pow
Red
Right front impact sensor (behind right side of front bumper)
Sb1l, sb1s
Sb2l, sb2s
Sb3l, sb3s
Sb4l, sb4s
Sb5l, sb5s
Sb6l, sb6s
Short contact
Side airbag cut-off indicator
Side element (right side of seat back)
Srs indicator
Srs indicator circuit
Ss1l, ss1s
Underdash fuse/relay box (under left side of dash)
Upper element (upper 2 sensors in seat back)
Wrn

Supplemental Restraints Wiring Diagram, Hybrid (1 of 2) for Honda Civic Si 2003

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List of elements for Supplemental Restraints Wiring Diagram, Hybrid (1 of 2) for Honda Civic Si 2003:

(under front passenger seat) g551
(under front passenger's seat) g551
A10
A11
A12
A13
A14
A15
A16
A17
A18
B10
B11
B12
B13
B14
B15
B16
B17
B18
Bsdh
Bsdl
Bsph
Bspl
Buck led
Buck- led
Cable reel
Caution: when ignition switch is on, or has been turned off for less than three minutes, srs unit if bumped, could deploy air bags
Data link connector (dlc) (partial) (under middle of dash)
Diag-h
Dr belt sw
Driver's air bag first inflator
Driver's air bag second inflator
Driver's seat belt buckle tensioner
Driver's seat belt switch
Driver's side air bag inflator (u.s. models only)
Driver's side impact sensor (left side of floor)
Front passenger's seat belt buckle tensioner
Front passenger's seat belt switch
Front passenger's side air bag inflator (u.s. models only)
Front passenger's side impact sensor (right side of floor)
Frsl
Frsr
Fuse 10a
Fuse 15a
G402 (under middle of dash)
Gnda
Gndb
Hot in on or start
Ignition
Mes con
Mes connector (under left side of dash)
Multiplex control unit
Odus
P14
Pnk
Red
Sadc1
Sadc2
Sadh1
Sadh2
Sapc1
Sapc2
Saph1
Saph2
Sbpdc
Sbpdh
Sbprc
Sbprh
Scs
Sdg
Sdv
Short contact
Spg
Spv
Srplc
Srplh
Srprc
Srprh
Srs ind
Srs unit (under middle of dash)
Ssdc
Ssdh
Sspc
Ssph
Steering wheel
U.s. models only
Un buck- led
Un- buck led
Underdash fuse/relay box (under left side of dash)

Supplemental Restraints Wiring Diagram, Hybrid (2 of 2) for Honda Civic Si 2003

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List of elements for Supplemental Restraints Wiring Diagram, Hybrid (2 of 2) for Honda Civic Si 2003:

(under front passenger seat) g551
(under gauge assembly) g501
A17
B17
B22
Driver's seat belt tensioner
Front passenger's air bag first inflator
Front passenger's air bag second inflator
Front passenger's seat belt tensioner
Fuse 7.5a
G402 (under middle of dash)
Gauge assembly
Gnd
Hot in on or start
Left front impact sensor (behind left side of front bumper)
Lower element (lower four sensors in seat back)
Odus
Opds sensor
Opds unit (in front passenger's seat)
Pnk
Pow
Red
Right front impact sensor (behind right side of front bumper)
Sb1l, sb1s
Sb2l, sb2s
Sb3l, sb3s
Sb4l, sb4s
Sb5l, sb5s
Sb6l, sb6s
Short contact
Side air bag cut-off indicator
Side element (right side of seat back)
Srs indicator
Srs indicator circuit
Ss1l, ss1s
Underdash fuse/relay box (under left side of dash)
Upper element (upper two sensors in seat back)
Warning: to avoid accidental deployment & possible injury, always disconnect driver's air bag, front passenger's air bag & seat belt tensioner connectors (which automatically shorts them) before working near any srs wiring
Wrn

TRANSMISSION

A/T Wiring Diagram, Hybrid for Honda Civic Si 2003

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List of elements for A/T Wiring Diagram, Hybrid for Honda Civic Si 2003:

(top left of engine) g101
(transaxle housing)
(transaxle valve body)
(under gauge assembly)
A10
A11
A12
A13
A14
A15
A16
A17
A18
A19
A20
A21
A22
A23
A24
A25
A26
A27
A28
A29
A30
A31
Atpd
Atpfwd
Atpl
Atpnp
Atpr
Atps
B10
B11
B12
B13
B14
B15
B16
B17
B18
B19
B20
B21
B22
B23
B24
Bk sw
Box
Brake pedal position switch (under left side of dash)
C10
C109
C11
C12
C13
C14
C15
C16
C17
Cas a
Cas b
Cas solenoid valves a & b (right side of engine compt)
Ccs
Cpu
Cruise control system
Cvt drive pulley pressure control valve
Cvt drive pulley speed sensor
Cvt driven pulley pressure control valve
Cvt driven pulley speed sensor
Cvt speed sensor
Cvt start clutch pressure control valve
D11
Data link connector (under center of dash)
Dimming circuit
Dn ls +
Dn ls -
Dr ls +
Dr ls -
Driver
E10
E13
E17
E26
Ecm (behind glove box)
Ect
Engine coolant temperature sensor (rear of engine)
Fuse 10a
Fuse 15a
Fuse 7.5a
G101 (top left of engine)
G101 (top left side of engine)
G201 (behind right side of front bumper)
G501
Gauge assembly
Hot at all times
Hot in on or start
Iat
Ig1
Ig2
Inhibitor solenoid
Intake air temperature sensor (on center of engine)
J/c
J/c c106 (behind glove box)
J/c c109
J/c c109 (center of engine)
J/c c109 (on center of engine)
J/c c111 (center of engine)
K-line
K10
Lg1
Lg2
Manifold absolute pressure sensor (left rear side of engine)
Map pb
Mcm (behind glove box)
Multiplex control unit
Ndn
Ndr
Ndrsg
Nep
Pg1
Pg2
Pnk
Red
Rscd
Rscdc
Sc ls +
Sc ls -
Scs
Sefmj
Sg1
Sg2
Slu
Sol inh
Tma
Tmb
Tp sensor (throttle body)
Tps
Transmission control module (behind right kick panel)
Transmission range switch (transaxle housing)
Under- dash fuse/ relay
Under- hood fuse/ relay
Vbu
Vcc1
Vcc2
Vel
Vel2
Velsg
Vref
Vss out
Wen

A/T Wiring Diagram, with CVT, with CVT Except Hybrid for Honda Civic Si 2003

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List of elements for A/T Wiring Diagram, with CVT, with CVT Except Hybrid for Honda Civic Si 2003:

(behind glove box) pgm-fi main relay 1
(middle of engine) g101
(not used)
(on cylinder head cover) j/c c104
(transmission housing)
(under gauge assembly) g501
A10
A15
A16
A17
A18
A20
A21
A23
A24
Anti-theft system
Atpd
Atpfwd
Atpl
Atpnp
Atpr
Atps
B11
B16
B24
Bksw
Box
Brake pedal position switch (under left side of dash)
C10
C11
C12
C15
C16
C18
C20
C22
Cpu
Cruise control unit (under left side of dash)
Cvt control valves & inhibitor solenoid (transmission housing)
Cvt drive pulley speed sensor
Cvt driven pulley speed sensor
Cvt pulley press
Cvt speed change
Cvt speed sensor
Cvt start press
D10
Data link connector (under left side of dash)
Dimming circuit
Driver
E10
E13
E22
E23
E24
E29
Ect
Engine coolant temperature sensor (middle of engine)
Exterior lights system (back-up lamps)
Fuse 15a
Fuse 7.5a
G101 (middle of engine)
Gauge assembly
Hlc ls +
Hlcls(-)
Hot at all times
Hot in on or start
Ig1
Igp1
Igp2
Ilu
Inhibitor solenoid
Inhsol
J/c c102 (behind glove box)
J/c c103 (on cylinder head cover)
K-line
K10
Lg1
Lg2
Mrly
Multiplex control unit
Ndn
Ndr
Non-sae terminal number (used in service manual)
Pg1
Pg2
Powertrain control module (behind glove box)
Red
Sae terminal number
Sc ls +
Scls (-)
Scs
Sefmj
Sg2
Sh ls +
Shls (-)
Throttle position sensor (on throttle body)
Tps
Transmission range switch (transmission housing)
Under- dash fuse/ relay
Under- hood fuse/ relay
Vcc1
Vcc2
Vel1
Vel2

A/T Wiring Diagram, without CVT for Honda Civic Si 2003

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List of elements for A/T Wiring Diagram, without CVT for Honda Civic Si 2003:

(behind glove box) pgm-fi main relay 1
(not used)
(transmission housing) vehicle speed sensor
(under gauge assembly) g501
2003 dx
A/t clutch pressure control solenoid valves (transmission housing)
A10
A11
A15
A16
A17
A18
A20
A23
A24
Anti-theft system
Atp2
Atpd3
Atpd4
Atpfwd
Atpnp
Atpr
B11
B16
B17
Bksw
Box
Braid
Brake pedal position switch (under left side of dash)
C10
C11
C12
C14
C15
C18
C20
C21
Ccs
Countershaft speed sensor (transmission housing)
Cpu
Cruise control syetm
Cruise control unit (under left side of dash)
D10
Data link connector (under left side of dash)
Dimming circuit
Driver
E10
E12
E13
E22
E23
E24
E29
Ect
Engine coolant temperature sensor (middle of engine)
Except 2003 dx
Exterior lights system (back-up lamps)
Fuse 10a
Fuse 15a
Fuse 7.5a
G101 (middle of engine)
Gauge assembly
Hot at all times
Hot in on or start
Ig1
Igp1
Igp2
Ilu
J/c c102 (behind glove box)
J/c c103 (on cylinder head cover)
J/c c104 (on cylinder head cover)
K-line
K10
Lg1
Lg2
Lsa+
Lsa-
Lsb+
Lsb-
Mainshaft speed sensor (transmission housing)
Mrly
Multiplex control unit
Ncsg
Nmsg
Non-sae terminal number (used in service manual)
Pg1
Pg2
Pnk
Powertrain control module (behind glove box)
Red
Sae terminal number
Scs
Sefmj
Sgl
Sha
Shb
Shift solenoid valve a & b (transmission housing)
Tcc solenoid valve (transmission housing)
Throttle position sensor (on throttle body)
Tps
Transmission range switch (transmission housing)
Under- dash fuse/ relay
Under- hood fuse/ relay
Vcc2
Vss

WARNING SYSTEMS

Warning Systems Wiring Diagram, Except Hatchback & Hybrid for Honda Civic Si 2003

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List of elements for Warning Systems Wiring Diagram, Except Hatchback & Hybrid for Honda Civic Si 2003:

(ig) keylt (-)
(ig1) meter
(in steering column cover)
(meter) bus
(sefmj) bus
(under middle of dash) srs unit
+b back up
A15
A16
A17
A18
Alternator
Altl
B10
B20
Beeper
Bus(sefmj)
C11
Combination light switch
Cpu
D11
Drive circuit
Driver door switch
Driver seat belt/srs
Driver's door switch
Driver's seat belt switch (under driver's seat)
E10
E24
Ecm/pcm (behind glove box)
Exterior lights system
Fuse 10a
Fuse 15a
Fuse 7.5a
G401 (under gauge assembly)
G501 (under gauge assembly)
G551 (under front passenger's seat)
Gauge assembly
Ground
Gx, dx
Head
Headlight switch
Hot at all times
Hot in on or start
Hx,lx,ex
Ignition key light
Ignition key switch
Ignition key switch/ key light
Illumination (+)
K10
Key switch input
Low oil pressure indicator
Multiplex control unit
Off
Oil pressure switch (near oil filter)
Park
Seat belt reminder indicator
Security control unit connector (optional)
Small lt rly-
Taillight relay
Underdash fuse/relay box (under left side of dash)
Underhood fuse/relay box (right side of engine compt)

Warning Systems Wiring Diagram, Hatchback for Honda Civic Si 2003

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List of elements for Warning Systems Wiring Diagram, Hatchback for Honda Civic Si 2003:

(ig) keylt (-)
(under middle of dash) srs unit
Alternator
B+ backup
B10
Beeper
C11
Combination light switch
D11
Driver door switch
Driver seat belt/srs
Driver's door switch
Driver's seat belt switch
E10
E24
Ecm/pcm (behind glove box)
Fuse 10a
Fuse 7.5a
G401 (under gauge assembly)
G502 (under right side of dash)
G551 (under front passenger's seat)
Gauge assembly
Ground
Head
Headlight switch
Headliglht switch
Hot at all times
Hot in on or start
Ignition key switch
Ignition key switch/ key light
Illummination (+)
Key switch input
Low oil pressure indicator
Multiplex bus
Multiplex control unit
Oil pressure switch
Park
Security control unit connector
Small
Taillight relay
Underdash fuse/relay box (under left side of dash)
Underhood fuse/relay box (right side of engine compt)

Warning Systems Wiring Diagram, Hybrid for Honda Civic Si 2003

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List of elements for Warning Systems Wiring Diagram, Hybrid for Honda Civic Si 2003:

(behind right kick panel) (cvt) transmission control module
(on left side of engine compt) underdash fuse/relay box
(under middle of dash) srs unit
+b back up
A21
B17
Beeper
Bus
C11
Combination light switch
Cpu
D11
Door indicator
Driver circuit
Driver door switch
Driver seat belt/srs
Driver's door switch
Driver's seat belt switch
E10
Exterior lights system
Fuse 10a
Fuse 7.5a
G401 (under gauge assembly)
G501 (under gauge assembly)
G551 (under front seat) passenger's
Gauge assembly
Ground
Head
Headlight switch
Hot at all times
Hot in on or start
Ig key lt (-)
Ig1 mtr
Ignition key light
Ignition key switch
Ignition key switch/ key light
Illumination (+)
Key switch input
Low oil pressure indicator
Multiplex control unit
Off
Oil pressure switch
Park
Seat belt reminder indicator
Security control unit connector (optional)
Small lt rly (-)
Taillight relay
Underdash fuse/relay box (on left side of engine compt)
Underhood fuse/relay box (on left side of engine compt)

WIPER/WASHER

Front Wiper/Washer Wiring Diagram, Hatchback for Honda Civic Si 2003

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List of elements for Front Wiper/Washer Wiring Diagram, Hatchback for Honda Civic Si 2003:

Fr washer (int)
Fr washer motor
Fr wiper pass
Fuse 30a
G201 (right front of vehicle)
G401 (under gauge assembly)
Hot in on or start
Ig1 wpr
Mist wiper input
Multiplex control unit
Underdash fuse/relay box (behind left side of dash)
Windshield washer motor (behind left side of front bumper)
Windshield wiper motor 1 park 2 run 3 low 4 high (under left side of cowl cover)
Wiper/ washer switch 0 off 1 intermittent 2 low 3 high 4 mist 5 wash

Wiper/Washer Wiring Diagram, Except Hatchback & Hybrid for Honda Civic Si 2003

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List of elements for Wiper/Washer Wiring Diagram, Except Hatchback & Hybrid for Honda Civic Si 2003:

(usa, canada: lx)
Fr washer (int)
Fr washer motor
Fr wiper (int vol+)
Fr wiper (int vol-)
Fr wiper pass
Fuse 20a
G301 (behind left side of front bumper)
G401 (under gauge assembly)
Hot in on or start
Ig1 wpr
Int
Intermittent dwell time controller
Mist
Mist wiper input
Multiplex control unit
Off
Park
Run
Underdash fuse/ relay box (under left side of dash)
Wash
Windshield washer motor (behind left side of front bumper)
Windshield wiper motor (under left side of cowl cover)
Wiper/ washer switch

Wiper/Washer Wiring Diagram, Hybrid for Honda Civic Si 2003

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List of elements for Wiper/Washer Wiring Diagram, Hybrid for Honda Civic Si 2003:

(under left side of dash)
Fr washer mtr
Fr wiper (as)
Fr wiper (int)
Fr wiper int unit
Fr wiper int vol+
Fr wiper int vol-
Fuse 20a
G201 (behind right side of front bumper)
G301 (behind left side of front bumper)
G401 (under gauge assembly)
Hot in on or start
Ig1 wpr
Int
Intermittent dwell time controller
Mist
Multiplex control unit
Off
Park
Run
Underdash fuse/relay box
Wash
Windshield washer motor (behind left side of front bumper)
Windshield wiper motor (under left side of cowl cover)
Wiper/ washer switch