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WIRING-DIAGRAMS

SEAT LEON 2004 – 1.8 l/92 kW Motronic, engine codes APG . Wiring diagrams, Pin Connector, Location

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Wiring Diagram SEAT LEON 2004 - Battery - starter - alternator - voltage regulator - ignition/starter switch - X contact relief relay



Wiring Diagram SEAT LEON 2004 - Battery - starter - alternator - voltage regulator - ignition/starter switch - X contact relief relayGet access to all wiring diagrams of the carDownload PDF file
ABattery
BStarter
CAlternator
C1Voltage regulator
DIgnition/starter switch
J59X contact relief relay
S162Fuse -1- (30), in fuse box/battery
S163Fuse -2- (30), in fuse box/battery
S176Fuse -4- (30), in fuse box/battery
S177Fuse -5- (30), in fuse box/battery
T2k2-pin connector, on engine
T4l4-pin connector, on engine
T6l6-pin connector, brown, in protective housing for connectors, on left in plenum chamber
  500 Screw connection -1- (30), on relay plate
  501 Screw connection -2- (30), on relay plate
  502 Screw connection -1- (30a), on relay plate
  A2 Positive (+) connection (15), in dash panel wiring harness
  A32 Positive (+) connection (30), in dash panel wiring harness
*Only models with air conditioner

Wiring Diagram SEAT LEON 2004 - Motronic control unit - hall sender - terminal 30 voltage supply relay - ignition transformer - spark plug connector - spark plug



Wiring Diagram SEAT LEON 2004 - Motronic control unit - hall sender - terminal 30 voltage supply relay - ignition transformer - spark plug connector - spark plugGet access to all wiring diagrams of the carDownload PDF file
G40Hall sender
G212Exhaust gas recirculation potentiometer
J220Motronic control unit
J317Terminal 30 voltage supply relay
N18Exhaust gas recirculation valve
N152Ignition transformer
PSpark plug connector
QSpark plugs
T2nd2-pin connector
T6l6-pin connector, brown, in protective housing for connectors, on left in plenum chamber
T14a14-pin connector, in cable channel left
  85 Earth connection -1-, in engine compartment wiring harness
  A104 Positive (+) connection -2- (15), in dash panel wiring harness
  D75 Positive (+) connection -2- (30), in engine compartment wiring harness
  D133 Connection (Hall sender signal), in engine compartment wiring harness
  D134 Connection (ignition timing sender signal), in engine compartment wiring harness

Wiring Diagram SEAT LEON 2004 - Motronic control unit - coolant temperature sender - engine speed sender - knock sensor I - knock sensor II



Wiring Diagram SEAT LEON 2004 - Motronic control unit - coolant temperature sender - engine speed sender - knock sensor I - knock sensor IIGet access to all wiring diagrams of the carDownload PDF file
G2Coolant temperature sender
G61Knock sensor I
G62Coolant temperature sender
G66Knock sensor II
J220Motronic control unit
T3e3-pin connector, near intake manifold
T3f3-pin connector, near intake manifold
T10d10-pin connector, green, in protective housing for connectors, on left in plenum chamber
T14a14-pin connector, in cable channel left
  139 Earth connection (sender earth), in Motronic wiring harness
  220 Earth connection (sender earth), in engine wiring harness

Wiring Diagram SEAT LEON 2004 - Motronic control unit - throttle valve control unit - engine speed sender - throttle valve drive (electric throttle operation)



Wiring Diagram SEAT LEON 2004 - Motronic control unit - throttle valve control unit - engine speed sender - throttle valve drive (electric throttle operation)Get access to all wiring diagrams of the carDownload PDF file
G28Engine speed sender
G186Throttle valve drive (electric throttle operation)
G187Throttle valve drive angle sender -1- (electric throttle operation)
G188Throttle valve drive angle sender -2- (electric throttle operation)
J220Motronic control unit
J293Radiator fan control unit
J338Throttle valve control unit
T3b3-pin connector, on radiator
T1010-pin connector, orange, in protective housing for connectors, on left in plenum chamber
  220 Earth connection (sender earth), in engine wiring harness
*Only models with multi-function display

Wiring Diagram SEAT LEON 2004 - Motronic control unit - power assisted steering pressure switch - accelerator pedal position sender - accelerator pedal position sender -2-



Wiring Diagram SEAT LEON 2004 - Motronic control unit - power assisted steering pressure switch - accelerator pedal position sender - accelerator pedal position sender -2-Get access to all wiring diagrams of the carDownload PDF file
F88Power assisted steering pressure switch
G79Accelerator pedal position sender
G185Accelerator pedal position sender -2-
J220Motronic control unit
J255Climatronic control unit
J293Radiator fan control unit
T1010-pin connector, orange, in protective housing for connectors, on left in plenum chamber
T10h10-pin connector, blue, in protective housing for connectors, on left in plenum chamber
  131 Earth connection -2-, in engine compartment wiring harness
*Only models with manual gearbox
**Only models with automatic gearbox

Wiring Diagram SEAT LEON 2004 - Motronic control unit - injector cylinder 1 - injector cylinder 2 - injector cylinder 3 - injector cylinder 4



Wiring Diagram SEAT LEON 2004 - Motronic control unit - injector cylinder 1 - injector cylinder 2 - injector cylinder 3 - injector cylinder 4Get access to all wiring diagrams of the carDownload PDF file
FBrake light switch
J220Motronic control unit
N30Injector, cylinder 1
N31Injector, cylinder 2
N32Injector, cylinder 3
N33Injector, cylinder 4
S232Fuse in fuse box
T1010-pin connector, orange, in protective housing for connectors, on left in plenum chamber
T10d10-pin connector, green, in protective housing for connectors, on left in plenum chamber
T10e10-pin connector, black, in protective housing for connectors, on left in plenum chamber
T14a14-pin connector, in cable channel left
  B168 Connection (86), in interior wiring harness
  D95 Connection (injectors), in engine compartment wiring harness
  W1 Positive (+) connection -1- (54), in rear wiring harness
*Wire W for self-diagnosis

Wiring Diagram SEAT LEON 2004 - Motronic control unit - lambda probe - lambda probe after catalyst - secondary air pump relay - activated charcoal filter system solenoid valve 1



Wiring Diagram SEAT LEON 2004 - Motronic control unit - lambda probe - lambda probe after catalyst - secondary air pump relay - activated charcoal filter system solenoid valve 1Get access to all wiring diagrams of the carDownload PDF file
G39Lambda probe
G130Lambda probe after catalyst
J220Motronic control unit
J299Secondary air pump relay
N80Activated charcoal filter system solenoid valve 1 (pulsed)
Z19Lambda probe heater
Z29Lambda probe 1 heater, downstream of catalytic converter
T4p4-pin connector, centre in engine compartment
T6q6-pin connector, on exhaust pipe
  D108 Connection -6-, in engine compartment wiring harness
  E7 Positive (+) connection (87a), in Motronic wiring harness

Wiring Diagram SEAT LEON 2004 - Motronic control unit - air mass meter - secondary air pump motor



Wiring Diagram SEAT LEON 2004 - Motronic control unit - air mass meter - secondary air pump motorGet access to all wiring diagrams of the carDownload PDF file
G70Air mass meter
J104ABS with EDL control unit
J220Motronic control unit
J318Vacuum pump relay
V101Secondary air pump motor
T1010-pin connector, orange, in protective housing for connectors, on left in plenum chamber
T10d10-pin connector, green, in protective housing for connectors, on left in plenum chamber
  A121 Connection (high bus), in dash panel wiring harness
  A122 Connection (low bus), in dash panel wiring harness
  E30 Connection (87a), in engine wiring harness
*Only models with automatic gearbox

Wiring Diagram SEAT LEON 2004 - Motronic control unit - charge pressure control solenoid valve - inlet camshaft timing adjustment valve -1- - turbocharger divert air valve



Wiring Diagram SEAT LEON 2004 - Motronic control unit - charge pressure control solenoid valve - inlet camshaft timing adjustment valve -1- - turbocharger divert air valveGet access to all wiring diagrams of the carDownload PDF file
DIgnition/starter switch
F36Clutch pedal switch
J17Fuel pump relay
J220Motronic control unit
J234Airbag control unit
N75Charge pressure control solenoid valve
N205Inlet camshaft timing adjustment valve -1-
N249Turbocharger divert air valve
T6l6-pin connector, brown, in protective housing for connectors, on left in plenum chamber
T1010-pin connector, orange, in protective housing for connectors, on left in plenum chamber
T10d10-pin connector, green, in protective housing for connectors, on left in plenum chamber
  A20 Connection (15a), in dash panel wiring harness
  A27 Connection (speed signal), in dash panel wiring harness
  A125 Connection (crash signal), in dash panel wiring harness
  D102 Connection -2-, in engine compartment wiring harness
*Only models with manual gearbox

Wiring Diagram SEAT LEON 2004 - Fuel gauge sender - fuel pump (pre-supply pump) - coolant shortage indicator sender



Wiring Diagram SEAT LEON 2004 - Fuel gauge sender - fuel pump (pre-supply pump) - coolant shortage indicator senderGet access to all wiring diagrams of the carDownload PDF file
GFuel gauge sender
G6Fuel pump (pre-supply pump)
G32Coolant shortage indicator sender
N79Heater element (crankcase breather)
S228Fuse in fuse box
S234Fuse in fuse box
S243Fuse in fuse box
T6l6-pin connector, brown, in protective housing for connectors, on left in plenum chamber
T14a14-pin connector, in cable channel left
  81 Earth connection -1-, in dash panel wiring harness
  269 Earth connection (sender earth) -1-, in dash panel wiring harness
  504 Screw connection -1- (87F), on relay plate
  A99 Connection -1- (87), in dash panel wiring harness
  A100 Connection -2- (87), in dash panel wiring harness

Wiring Diagram SEAT LEON 2004 - Control unit with display in dash panel insert - oil pressure switch - speedometer sender - oil pressure warning buzzer - alternator warning lamp



Wiring Diagram SEAT LEON 2004 - Control unit with display in dash panel insert - oil pressure switch - speedometer sender - oil pressure warning buzzer - alternator warning lampGet access to all wiring diagrams of the carDownload PDF file
F1Oil pressure switch
F4Reversing light switch
G22Speedometer sender
H11Oil pressure warning buzzer
J285Control unit with display in dash panel insert
K2Alternator warning lamp
K3Oil pressure warning lamp
K28Coolant temperature warning lamp/coolant shortage warning lamp
K83Exhaust emissions warning lamp
K132Electronic power control fault lamp
S7Fuse in fuse box/relay plate
T1010-pin connector, orange, in protective housing for connectors, on left in plenum chamber
T14a14-pin connector, in cable channel left
  B163 Positive (+) connection -1- (15), in interior wiring harness
*Only models with multi-function display

Wiring Diagram SEAT LEON 2004 - Control unit with display in dash panel insert - multi-function display - multi-function display call-up button - multi-function display - memory switch



Wiring Diagram SEAT LEON 2004 - Control unit with display in dash panel insert - multi-function display - multi-function display call-up button - multi-function display - memory switchGet access to all wiring diagrams of the carDownload PDF file
E86Multi-function display call-up button
E109Multi-function display, memory switch
G1Fuel gauge
G3Coolant temperature gauge
G5Rev. counter
G21Speedometer
J119Multi-function display
J285Control unit with display in dash panel insert
K105Reserve fuel warning lamp
  A13 Connection (door contact switch), in dash panel wiring harness
*Only models with multi-function display
**Wire W for self-diagnosis


SEAT LEON 2004 Overview of relay

Overview of relay
   
SEAT LEON 2004 Overview of relayGet access to all wiring diagrams of the carDownload PDF file
1 - 
2 -  Relay on relay plate
q   Position of relays
2 - 

   
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SEAT LEON 2004 Relay on relay plate

Relay on relay plate
1 -  Dual tone horn relay -J4- (53)
2 -  X-contact relief relay -J59- (100)
3 -  Vacant
4 -  Fuel pump relay -J17- (409)
 -  Glow plug relay -J52- (103)
V y Vl -  Automatic intermittent wash and wipe relay -J31-
 -  with rain sensor, with/without headlight washer system (192)
 -  without rain sensor, with headlight washer system (389)
 -  without rain sensor, without headlight washer system (377)
 
SEAT LEON 2004 Relay on relay plateGet access to all wiring diagrams of the carDownload PDF file

SEAT LEON 2004 Relay on the 13 position additional relay carrier above the relay plate

Relay on the 13 position additional relay carrier above the relay plate
Left-handdrive vehicles:
1 -  Telephone relay
2....9 -  Vacant
10 -  Fuel pump relay (turbo diesel engine unit injectors) (167) -J17- (up to October 2002)
 -  Fuel pump relay (TDI-PD) (53) (from November 2002)
11 -  Automatic gearbox relay AG4 -J60- (175)
12 -  Terminal 30 voltage supply relay -J317- (109)
13 -  Radiator fan relay (53)
 
SEAT LEON 2004 Relay on the 13 position additional relay carrier above the relay plateGet access to all wiring diagrams of the carDownload PDF file
Right-handdrive vehicles:
1....5 -  Vacant
6 -  Telephone switch-over relay
7 -  Radiator fan relay -J26- (53)
8 -  Terminal 30 voltage supply relay (109)
9 -  Automatic gearbox relay AG4 -J60- (175)
10 -  Fuel pump relay (turbo diesel engine unit injectors)-J17- (167) (up to October 2002)
 -  Fuel pump relay (TDI-PD) (53) (from November 2002)
11 -  Vacant
12 -  Cigarette lighter relay Australia -J193- (53)
13 -  Vacant
 
SEAT LEON 2004 Relay on the 13 position additional relay carrier above the relay plateGet access to all wiring diagrams of the carDownload PDF file

SEAT LEON 2004 Glow plug activation control unit:

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SEAT LEON 2004 Overview of fuses

Overview of fuses
   
SEAT LEON 2004 Overview of fusesGet access to all wiring diagrams of the carDownload PDF file
1 - 
q   Position of fuses
2 - 
3 -  Fuse on fuse holder -S162-, -S163-, -S164-, -S176-, -S177-, -S178-, -S179-, -S180-, next to battery
q   Location, up to August 2000:
q   Location, from September 2000:

   
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SEAT LEON 2004 Position of fuses in fuse holder, left dash panel

Position of fuses in fuse holder, left dash panel
No.   Current Flow Diagram designation Nominal value   Function/component Terminal
1 - -S1- 10A - Glove compartment light, heated washer jets  
2 - -S2- 10A - Turn signals  
3 - -S3- 5A - Side light warning lamp  
4 - -S4- 5A - Number plate light  
5 - -S5- 7.5A - Number plate light  
6 - -S6- 5A - Electric folding exterior mirror and window regulator (applicable up to October 2001)
Convenience system central control unit (applicable from November 2001)		  
7 - -S7- 10A - Reversing light  
8 - -S8- 5A - Telephone  
9 - -S9- 5A - ABS/ESP/HALDEX  
10 - -S10- 10A - Petrol engine control unit (applicable up to October 2001)
Diesel engine control unit (applicable up to October 2001)
- S-contact (applicable from November 2001)		  
11 - -S11- 5A - Dash panel insert  
12 - -S12- 7.5A - Diagnosis voltage  
13 - -S13- 10A - Brake lights  
14 - -S14- 10A - Interior light  
15 - -S15- 5A - Dash panel insert, steering angle sender  
16 - -S16- 10A - Compressor  

   

SEAT LEON 2004 Position of fuses in fuse holder, left dash panel

Toledo/León Fitting Locations No.  802 / 5
   

Toledo/León Fitting Locations No.  802 / 6
   

Toledo/León Fitting Locations No.  802 / 7
   
Auxiliary fuse above additional relay carrier
Right-handdrive vehicles
A -  Seat adjustment fuse -S45- (30 A)
B -  Vacuum pump fuse (20 A)
C -  Window regulator fuse -S37- (30 A)
D -  Fuel charging hole fuse -S323- (10 A)
E -  Alarm horn fuse -S111- (15 A)
 -  Turn signal fuse -S144- (15 A)
F -  Taxi fuse (15 A)
G -  Vacant
H -  Vacant
 
SEAT LEON 2004 Position of fuses in fuse holder, left dash panelGet access to all wiring diagrams of the carDownload PDF file
Left-handdrive vehicles:
A -  Seat adjustment fuse -S45- (30 A)
B -  Vacuum pump fuse (20 A)
C -  Window regulator fuse -S37- (30 A)
D -  Vacant
E -  Taxi fuse (15 A)
F -  Alarm horn fuse 1 -S111- (15 A)
 -  Turn signal fuse -S144- (15 A)
G -  Fuel charging hole fuse -S323- (10 A)
H -  Vacant
 
SEAT LEON 2004 Position of fuses in fuse holder, left dash panelGet access to all wiring diagrams of the carDownload PDF file

SEAT LEON 2004 Fuse on fuse holder, next to battery (up to August 2000):

Fuse on fuse holder, next to battery (up to August 2000):
Fuses:
S162 -  Glow plug heater 50 A
S163 -  Engine control unit 50 A
S164 -  Radiator fan 40 A
S176 -  Passenger compartment, 110A
S177 -  Alternator (90 A), 110 A
 -  Alternator (120 A), 150 A
S178 -  ABS (pump), 30 A
S179 -  ABS, 30 A
S180 -  Radiator fan 30 A
 
SEAT LEON 2004 Fuse on fuse holder, next to battery (up to August 2000):Get access to all wiring diagrams of the carDownload PDF file

SEAT LEON 2004 Fuse on fuse holder, next to battery (from September 2000):

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SEAT LEON 2004 Overview of coupling station and connections for wiring harness

Overview of coupling station and connections for wiring harness
   
SEAT LEON 2004 Overview of coupling station and connections for wiring harnessGet access to all wiring diagrams of the carDownload PDF file
1 -  Coupling station in protective housing, in plenum chamber
q   With connectors -T10g-, -T10d-, -T10e-, -T10-, -T6l-, -T10h-,
2 -  Coupling station, right B-pillar
q   With connector
3 -  Coupling station on left of C-pillar
q   Location
4 -  Coupling station on left of A-pillar
q   With connector
5 -  Coupling station in engine compartment, in left wiring harness
q   Location

   
Coupling station in protective housing, in plenum chamber
SEAT LEON 2004 Overview of coupling station and connections for wiring harnessGet access to all wiring diagrams of the carDownload PDF file
1 -  10-pin connector -T10g-, grey, automatic gearbox
2 -  10-pin connector, -T10d-, white, data bus wire, engine control unit, automatic gearbox, Motronic control unit, ABS control unit
3 -  10-pin connector -T10e-, black, cruise control system, Motronic control unit, engine control unit
4 -  10-pin connector -T10-, orange, reversing lights, engine control unit, starter, Climatronic control unit, Motronic control unit
5 -  6-pin connector -T6l-, brown, starter, fuel pump relay, engine control unit

   
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6 -  10-pin connector -T10h-, blue, accelerator position sender, Motronic control unit, engine control unit
7 -  10-pin connector, -T10v-, green, radiator outlet coolant temperature sender, radiator fan control unit, potentiometer for temperature selection rotary knob

   

SEAT LEON 2004 Coupling station, right B-pillar

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SEAT LEON 2004 Coupling station on left of C-pillar

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SEAT LEON 2004 Coupling station on left of A-pillar

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SEAT LEON 2004 Coupling station in engine compartment, in left wiring harness

Coupling station in engine compartment, in left wiring harness
See connectors in fitting locations: Multi-pin connections.
 
SEAT LEON 2004 Coupling station in engine compartment, in left wiring harnessGet access to all wiring diagrams of the carDownload PDF file


SEAT LEON 2004 Overview of earth points in engine compartment

Overview of earth points in engine compartment
   
SEAT LEON 2004 Overview of earth points in engine compartmentGet access to all wiring diagrams of the carDownload PDF file

   
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  10 Earth point, in plenum chamber ⇒ -arrow-
 
SEAT LEON 2004 Overview of earth points in engine compartmentGet access to all wiring diagrams of the carDownload PDF file
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  1 Earth strap, battery - body
⇒ Arrow A
 
SEAT LEON 2004 Overview of earth points in engine compartmentGet access to all wiring diagrams of the carDownload PDF file
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  2 Earth strap, gearbox - body ⇒ -arrow-
 
SEAT LEON 2004 Overview of earth points in engine compartmentGet access to all wiring diagrams of the carDownload PDF file
Overview of earth points in vehicle interior
SEAT LEON 2004 Overview of earth points in engine compartmentGet access to all wiring diagrams of the carDownload PDF file

   
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  78 Earth point on right B-pillar ⇒ -arrow-
 
SEAT LEON 2004 Overview of earth points in engine compartmentGet access to all wiring diagrams of the carDownload PDF file
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  44 Earth point, lower part of left A-pillar ⇒ -arrow-
 
SEAT LEON 2004 Overview of earth points in engine compartmentGet access to all wiring diagrams of the carDownload PDF file
  33 Earth point behind dash panel on right ⇒ -arrow-
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  45 Earth point, behind dash panel
 
SEAT LEON 2004 Overview of earth points in engine compartmentGet access to all wiring diagrams of the carDownload PDF file

SEAT LEON 2004 Overview of earth points in luggage compartment (Toledo)

Overview of earth points in luggage compartment (Toledo)
SEAT LEON 2004 Overview of earth points in luggage compartment (Toledo)Get access to all wiring diagrams of the carDownload PDF file

   
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