ENGINE PERFORMANCE – Toyota Tacoma 2003 – SYSTEM WIRING DIAGRAMS

ENGINE PERFORMANCE

2.4L

2.4L, Engine Performance Wiring Diagram (1 of 4) for Toyota Tacoma 2003

List of elements for 2.4L, Engine Performance Wiring Diagram (1 of 4) for Toyota Tacoma 2003:

• (behind dash, above steering column) j/b 3 (left)
• (left side of engine compt) j/c j9, j10
• (on bracket, above brake pedal) stoplight switch
• (w/a/t)
• (w/tachometer)
• A/c system
• Ac1
• Act
• Batt
• C10
• C12
• C16
• C20
• Combination meter
• Control circuit
• Cruise control system
• Ea (left front fender)
• Efi fuse 20a
• Efi relay
• Els
• Engine control module (behind right side of dash)
• G14
• G17
• G22
• Hot at all times
• Hot in on or start
• I12 (dash harn, at right side of dash)
• I9 (dash harn, at center of dash)
• Idlo
• Ie (at right side of dash)
• Ign fuse 7.5a
• J/b 1 (behind dash, left of steering column)
• J/b 3 (center) (behind center of dash)
• J/b 3 (left) (behind dash, above steering column)
• J/b 3 (left) (w/ cruise control) (behind dash, above steering column)
• J/c 13 (above glove box)
• J10
• Malfunction indicator
• Nsw
• O/d main switch
• O/d off indicator
• Panel fuse 10a
• Power steering oil pressure switch (on power steering pump)
• Psw
• Ptnk
• R/b 2 (left side of engine compt)
• Sil
• Sp1
• Speedometer
• Sta
• Starting/charging system
• Stop fuse 15a
• Stp
• Tac
• Tachometer

2.4L, Engine Performance Wiring Diagram (2 of 4) for Toyota Tacoma 2003

List of elements for 2.4L, Engine Performance Wiring Diagram (2 of 4) for Toyota Tacoma 2003:

• (behind dash, above steering column) j/b 3 (left)
• (w/a/t)
• (w/m/t & 4wd)
• A15
• A16
• Batt
• Circuit opening relay (behind lower left of dash)
• Cruise control system
• Data link connector 3 (below left center of dash)
• Ecu-ig fuse 15a
• Ef (at ignition coil bracket)
• Fuel pump (in fuel tank)
• Gauge fuse 10a
• Hot at all times
• Hot in on or start
• Hot in start
• Ie (at right side of dash)
• Ig (at left side of dash)
• J/b 1 (behind dash, left of steering column)
• J/c (above glove box)
• O/d ecu (below center of dash)
• O/d solenoid (on transmission)
• Obd fuse 10a
• Od1
• Odlp
• Odms
• Park/neutral position switch (on transmission)
• R/b 2 (left side of engine compt)
• Sil
• Sol
• Sta fuse 7.5a
• Starting/ charging system
• Tac

2.4L, Engine Performance Wiring Diagram (3 of 4) for Toyota Tacoma 2003

List of elements for 2.4L, Engine Performance Wiring Diagram (3 of 4) for Toyota Tacoma 2003:

• (behind dash, above steering column) j/b 3 (left)
• (dash harn, at right side of dash)
• (on exhaust system, rear of engine) heated oxygen sensor (bank 1, sensor 2)
• (on left side of engine) camshaft position sensor
• (on left side of engine) crankshaft position sensor
• Acc
• Eb (under data link connector 1)
• Ef (at ignition coil bracket)
• Hot at all times
• I13
• I14
• Ignition coil & igniter 1 (top of cyl head cover)
• Ignition coil & igniter 2 (top of cyl head cover)
• Ignition coil & igniter 3 (top of cyl head cover)
• Ignition coil & igniter 4 (top of cyl head cover)
• Ignition switch
• Injector 1
• Injector 2
• Injector 3
• Injector 4
• Lock
• Noise filter (right side of engine compartment)
• Red
• Start

2.4L, Engine Performance Wiring Diagram (4 of 4) for Toyota Tacoma 2003

List of elements for 2.4L, Engine Performance Wiring Diagram (4 of 4) for Toyota Tacoma 2003:

• (left side of engine compartment) vsv (evap)
• (left side of engine compt, on fenderwell) vsv (vapor pressure sensor)
• (on exhaust system, rear of engine) air fuel ratio sensor (bank 1, sensor 1)
• (on rear of engine) engine coolant temperature sensor
• (on throttle body assembly) throttle position sensor
• (part of air intake assembly) mass airflow meter
• Af1+
• Af1-
• At right side of dash)
• Ccv
• Data link connector 1 (left side of engine compt)
• E01
• E02
• E03
• E04
• E2g
• Ef (at ignition coil bracket)
• Engine control module (behind right side of dash)
• Evp1
• Hafl
• Hts
• I13
• I13 (dash harn, at right side of dash)
• Idle air control valve (on throttle body assembly)
• Igf
• Igt1
• Igt2
• Igt3
• Igt4
• Knk1
• Knock sensor (on left side of engine)
• Ne+
• Ne-
• Oxs
• Pnk
• Red
• Rsd
• Tha
• Thw
• Tpc
• Vapor pressure sensor
• Vsv (canister closed valve) (left side of eng compt)
• Vta

2.7L

2.7L, Engine Performance Wiring Diagram (1 of 4) for Toyota Tacoma 2003

List of elements for 2.7L, Engine Performance Wiring Diagram (1 of 4) for Toyota Tacoma 2003:

• (4wd)
• (behind dash, above steering column) j/b 3 (left)
• (left kick panel)
• (left side of engine compt) j/c j9, j10
• (on bracket, above brake pedal) stoplight switch
• (w/4wd)
• (w/a/t & 4wd)
• (w/a/t)
• (w/tachometer)
• 4wd
• A/c system
• A/t oil temperature
• Ac1
• Act
• Batt
• C10
• C12
• C13
• C16
• C20
• Control circuit
• Cruise control system
• Ea (left front fender)
• Efi fuse 20a
• Efi relay
• Els
• Engine control module (behind right side of dash)
• G17
• G22
• Hot at all times
• Hot in on or start
• I12 (dash harn, at right side of dash)
• I9 (dash harn, at center of dash)
• Idlo
• Ie (at right side of dash)
• Ign fuse 7.5a
• Instrument cluster
• J/b 1 (behind dash, left of steering column)
• J/b 3 (center) (behind center of dash)
• J/b 3 (left) (behind dash, above steering column)
• J/b 3 (left) (w/ cruise control) (behind dash, above steering column)
• J/c 10
• J/c 13 (above glove box)
• J/c 9
• Malfunction indicator
• Nsw
• O/d main switch
• O/d off indicator
• Od1
• Odlp
• Odms
• Oilw
• Panel fuse 10a
• Pnk
• Power steering oil pressure switch (on power steering pump)
• Psw
• Ptnk
• Pwr
• R/b 2 (left side of engine compt)
• Red
• Sil
• Sp1
• Sp2+
• Sp2-
• Speedometer
• Sta
• Starting/charging system
• Stop fuse 15a
• Stp
• Tac
• Tachometer
• Tfn
• Transmissions system
• Vehicle speed sensor (on transmission)

2.7L, Engine Performance Wiring Diagram (2 of 4) for Toyota Tacoma 2003

List of elements for 2.7L, Engine Performance Wiring Diagram (2 of 4) for Toyota Tacoma 2003:

• (4wd)
• (behind dash, above steering column)
• (behind dash, above steering column) j/b 3 (left)
• (w/a/t)
• (w/m/t & 4wd)
• A/t p
• A15
• A16
• Batt
• C10
• C12
• C13
• Circuit opening relay (behind lower left end of dash)
• Combination meter
• Cruise control system
• Data link connector 3 (below left center of dash)
• Diode (behind left side of dash)
• Ect pwr
• Ef (at ignition coil bracket)
• Electronically controlled transmission pattern select switch
• F16
• F20
• Fuel pump (in fuel tank)
• Gauge fuse 10a
• H12
• H13
• Hot at all times
• Hot in on or start
• Hot in start
• I9 (dash harn, at center of dash)
• Ie (at right side of dash)
• Ig (at left side of dash)
• J/b 1 (behind dash, left of steering column)
• J/b 3 (center) (behind center of dash)
• J/b 3 (left)
• J/b 3 (left) (behind dash, above steering column)
• J/c (above glove box)
• J/c 11 (above glove box)
• Obd fuse 10a
• Park/neutral position switch (on transmission)
• Pnk
• R/b 2 (left side of engine compt)
• Red
• Sil
• Sta fuse 7.5a
• Starting/ charging system
• Tac

2.7L, Engine Performance Wiring Diagram (3 of 4) for Toyota Tacoma 2003

List of elements for 2.7L, Engine Performance Wiring Diagram (3 of 4) for Toyota Tacoma 2003:

• (behind dash, above steering column) j/b 3 (left)
• (dash harn, upper right side of dash)
• (on exhaust system, rear of engine) heated oxygen sensor (bank 1, sensor 2)
• (on left rear of engine) egr gas temperature sensor
• (on left side of engine) camshaft position sensor
• (on left side of engine) crankshaft position sensor
• Acc
• Eb (under data link connector 1)
• Ef (at ignition coil bracket)
• Hot at all times
• I13
• I14
• Ignition coil & igniter 1 (top of cyl head cover)
• Ignition coil & igniter 2 (top of cyl head cover)
• Ignition coil & igniter 3 (top of cyl head cover)
• Ignition coil & igniter 4 (top of cyl head cover)
• Ignition switch
• Injector 1
• Injector 2
• Injector 3
• Injector 4
• Lock
• Noise filter (right side of engine compartment)
• Red
• Start

2.7L, Engine Performance Wiring Diagram (4 of 4) for Toyota Tacoma 2003

List of elements for 2.7L, Engine Performance Wiring Diagram (4 of 4) for Toyota Tacoma 2003:

• (left side of engine compartment) vsv (evap)
• (on exhaust system, rear of engine) air fuel ratio sensor (bank 1, sensor 1)
• (on rear of engine) engine coolant temperature sensor
• (on throttle body assembly) throttle position sensor
• (on top left rear of engine) vsv (egr)
• (on transmission) a/t oil temperature sensor
• (part of air intake assembly) mass airflow meter
• Af1+
• Af1-
• At right side of dash)
• Cruise control system
• E01
• E02
• E03
• E04
• E2g
• Ef (at ignition coil bracket)
• Egr
• Electronically controlled transmission solenoid (on transmission)
• Engine control module (behind right side of dash)
• Evp1
• Hafl
• Hts
• I13
• I13 (dash harn, behind right center of dash)
• Idle air control valve (on throttle body assembly)
• Igf
• Igt1
• Igt2
• Igt3
• Igt4
• Knk1
• Knock sensor (on left side of engine)
• Ne+
• Ne-
• Oxs
• Pnk
• Red
• Rsd
• Tbp
• Tha
• Thg
• Tho
• Thw
• Vapor pressure sensor
• Vsv (vapor switching valve)
• Vta

3.4L

3.4L, Engine Performance Wiring Diagram, Except M/T with 2-Wheel Drive (1 of 4) for Toyota Tacoma 2003

List of elements for 3.4L, Engine Performance Wiring Diagram, Except M/T with 2-Wheel Drive (1 of 4) for Toyota Tacoma 2003:

• (behind dash, above steering column) j/b 3 (left)
• (dash harn, at right side of dash)
• (dash harn, left end of dash)
• (left side of engine compt) j/c j9, j10
• (left side of engine compt, on fenderwell) vsv (pressure switching valve)
• (on bracket, above brake pedal) stoplight switch
• (w/4wd)
• (w/a/t & 4wd)
• (w/a/t)
• +bm
• 4wd
• A/c system
• A/t oil temperature
• Ac1
• Act
• Batt
• C10
• C12
• C13
• Combination meter
• Control circuit
• Cruise control system
• Ea (right front fender)
• Ects fuse 15a
• Efi fuse 20a
• Efi relay
• Engine control module (behind right side of dash)
• G17
• G22
• Heated oxygen sensor (bank 1, sensor 2) (on exhaust system, rear of engine)
• Hot at all times
• Hot in on or start
• I12 (dash harn, at right side of dash)
• I13
• I15
• Ie (at right side of dash)
• Ign fuse 7.5a
• Igsw
• J/b 1 (behind dash, left of steering column)
• J/b 3 (center) (behind center of dash)
• J/b 3 (left) (behind dash, above steering column)
• J/c j13 (above glove box)
• J10
• Malfunction indicator
• Mrel
• Nsw
• O/d main switch
• O/d off indicator
• Odlp
• Odms
• Oilw
• Pnk
• Pwr
• R/b 2 (left side of engine compt)
• Red
• Sil
• Sp1
• Speedometer
• Sta
• Starting/ charging system
• Stop fuse 10a
• Stp
• Tachometer
• Tfn
• Transmissions system
• Wfse

3.4L, Engine Performance Wiring Diagram, Except M/T with 2-Wheel Drive (2 of 4) for Toyota Tacoma 2003

List of elements for 3.4L, Engine Performance Wiring Diagram, Except M/T with 2-Wheel Drive (2 of 4) for Toyota Tacoma 2003:

• (behind dash, above steering column) j/b 3 (left)
• (w/a/t)
• (w/m/t & 4wd)
• A/t p
• A15
• A16
• Batt
• C10
• C12
• C13
• Circuit opening relay (behind lower left end of dash)
• Cl+
• Cl-
• Data link connector 3 (below left center of dash)
• Diode (behind top left side of dash)
• E10
• Eb (near throttle body)
• Ect pwr
• Electronically controlled transmission pattern select switch
• Engine control module (behind right side of dash)
• F16
• F20
• Fuel pump (in fuel tank)
• Gauge fuse 10a
• Hot at all times
• Hot in on or start
• Hot in start
• I6 (dash harn, behind left side of dash)
• Ie (at right side of dash)
• Ig (at left side of dash)
• Ig (left kick panel)
• Instrument cluster
• J/b 1 (behind dash, left of steering column)
• J/b 3 (left) (behind dash, above steering column)
• J/b 3 (left) (behind dash, above str col)
• J/c j11 (above glove box)
• J/c j13 (above glove box)
• Obd fuse 10a
• Park/neutral position switch (on transmission)
• Pnk
• R/b 2 (left side of engine compt)
• Red
• Sil
• Slt+
• Slt-
• Sta fuse 7.5a
• Starting/ charging system
• Vpa
• Vpa2
• Wfse

3.4L, Engine Performance Wiring Diagram, Except M/T with 2-Wheel Drive (3 of 4) for Toyota Tacoma 2003

List of elements for 3.4L, Engine Performance Wiring Diagram, Except M/T with 2-Wheel Drive (3 of 4) for Toyota Tacoma 2003:

• (at right rear of engine) throttle control motor
• (behind dash, above steering column) j/b 3 (left)
• (behind dash, left of steering column) accel position sensor
• (dash harn, at right side of dash) i13
• (dash harn, upper right side of dash)
• (left side of eng compt) vsv (canister closed valve)
• (lower front of engine) crankshaft position sensor
• (top right front of engine) camshaft position sensor
• (w/ tachometer)
• Acc
• Eb (near throttle body)
• Hot at all times
• I13
• I14
• Igniter (on right side of engine compartment)
• Ignition coil 1 (top of cyl head cover)
• Ignition coil 2 (top of cyl head cover)
• Ignition coil 3 (top of cyl head cover)
• Ignition switch
• Injector 1
• Injector 2
• Injector 3
• Injector 4
• Injector 5
• Injector 6
• Lock
• Red
• Start

3.4L, Engine Performance Wiring Diagram, Except M/T with 2-Wheel Drive (4 of 4) for Toyota Tacoma 2003

List of elements for 3.4L, Engine Performance Wiring Diagram, Except M/T with 2-Wheel Drive (4 of 4) for Toyota Tacoma 2003:

• (engine harn, at front of eng)
• (left front of engine) engine coolant temperature sensor
• (left side of engine compartment) vsv (evap)
• (left side of firewall) vapor pressure sensor
• (on exhaust system, rear of engine) air fuel ratio sensor (bank 1, sensor 1)
• (on power steering pump) power steering oil pressure switch
• (on throttle body assembly) throttle position sensor
• (on transmission) a/t oil temperature sensor
• (part of air intake assembly) mass airflow meter
• Af1+
• Af1-
• Ccv
• Computer data lines system
• E01
• E02
• E03
• E05
• E2g
• Eb (near throttle body)
• Electronically controlled transmission solenoid (on transmission)
• Engine control module (behind right side of dash)
• Evp1
• Ge01
• Ht2b
• Htaf1
• I13
• I13 (dash harn, (at right side of dash)
• Idle air control valve (on throttle body assembly)
• Igf
• Igt1
• Igt2
• Igt3
• Knk1
• Knk2
• Knock sensor 1 (top front of engine)
• Knock sensor 2 (top front of engine)
• Me01
• Ne+
• Ne-
• Ox2b
• Pnk
• Psw
• Ptnk
• Red
• Rsc
• Rso
• Slt
• Sp2+
• Sp2-
• Tbp
• Tha
• Thoc
• Thw
• Vehicle speed sensor (on transmission)
• Vta

3.4L, Engine Performance Wiring Diagram, M/T with 2-Wheel Drive (1 of 3) for Toyota Tacoma 2003

List of elements for 3.4L, Engine Performance Wiring Diagram, M/T with 2-Wheel Drive (1 of 3) for Toyota Tacoma 2003:

• (dash harn, at right side of dash)
• (in dash harn, at left end of dash)
• (left side of engine compt) j/c 9,10
• (left side of engine compt, on fenderwell) vsv (pressure switching valve)
• (on bracket, above brake pedal) stoplight switch
• A/c system
• Ac1
• Act
• Batt
• C10
• Circuit opening relay (below lower left end of dash)
• Combination meter
• Control circuit
• Cruise control system
• D19
• D20
• Ea (right front fender)
• Efi fuse 20a
• Efi relay
• Engine control module (behind right side of dash)
• Fuel pump (in fuel tank)
• Gauge fuse 10a
• Heated oxygen sensor (bank 1, sensor 2) (on exhaust system, rear of engine)
• Hot at all times
• Hot in on or start
• I13
• I15
• Idlo
• Ig (at left side of dash)
• Ign fuse 7.5a
• Igsw
• J/b 1 (behind dash, left of steering column)
• J/b 3 (left) (behind dash, above steering column)
• J10
• Malfunction indicator
• Mrel
• R/b 2 (left side of engine compt)
• Red
• Sil
• Sp1
• Speedometer
• Sta
• Starting/charging system
• Stop fuse 10a
• Stp
• Tachometer
• Wfse

3.4L, Engine Performance Wiring Diagram, M/T with 2-Wheel Drive (2 of 3) for Toyota Tacoma 2003

List of elements for 3.4L, Engine Performance Wiring Diagram, M/T with 2-Wheel Drive (2 of 3) for Toyota Tacoma 2003:

• (behind dash, above steering column) j/b 3 (left)
• (dash harn, at right side of dash)
• (dash harn, at right side of dash) i13
• (left side of eng compt) vsv (canister closed valve)
• (lower front of engine) crankshaft position sensor
• (top right front of engine) camshaft position sensor
• (w/ tachometer)
• A15
• Acc
• Batt
• Cruise control system
• Data link connector 3 (below left center of dash)
• Eb (left shock tower)
• Eb (near throttle body)
• Gnd
• Hot at all times
• I13
• I14
• Ie (at right side of dash)
• Igc1
• Igc2
• Igc3
• Igf
• Igniter (on right side of engine compartment)
• Ignition coil 1 (top of cyl head cover)
• Ignition coil 2 (top of cyl head cover)
• Ignition coil 3 (top of cyl head cover)
• Ignition switch
• Igt1
• Igt2
• Igt3
• Injector 1
• Injector 2
• Injector 3
• Injector 4
• Injector 5
• Injector 6
• J/b 3 (left) (behind dash, above steering column)
• J/c (above glove box)
• Lock
• Obd fuse 10a
• R/b 2 (left side of engine compt)
• Red
• Sil
• Start
• Tach
• Wfse

3.4L, Engine Performance Wiring Diagram, M/T with 2-Wheel Drive (3 of 3) for Toyota Tacoma 2003

List of elements for 3.4L, Engine Performance Wiring Diagram, M/T with 2-Wheel Drive (3 of 3) for Toyota Tacoma 2003:

• (eng harn, at left side of engine)
• (engine harn, at front of engine)
• (left front of engine) engine coolant temperature sensor
• (left side of engine compartment) vsv (evap)
• (left side of firewall) vapor pressure sensor
• (on exhaust system, rear of engine) air fuel ratio sensor (bank 1 sensor 1)
• (on power steering pump) power steering oil pressure switch
• (on throttle body assembly) throttle position sensor
• (part of air intake assembly) mass airflow meter
• Af1+
• Af1-
• Ccv
• Computer data lines system
• E01
• E02
• E05
• E2g
• Eb (near throttle body
• Engine control module (behind right side of dash)
• Evp1
• Ht2b
• Htaf1
• I13
• I13 (dash harn, at right side of dash)
• Idle air control valve (on throttle body assembly)
• Igf
• Igt1
• Igt2
• Igt3
• Knk1
• Knk2
• Knock sensor 1 (top front of engine)
• Knock sensor 2 (top front of engine)
• Ne+
• Ne-
• Ox2b
• Pnk
• Psw
• Ptnk
• Red
• Rsc
• Rso
• Tbp
• Tha
• Thw
• Vta