TRANSMISSION – Toyota Tacoma 2003 – SYSTEM WIRING DIAGRAMS

TRANSMISSION

4WD Wiring Diagram, with 2-4 Select Switch for Toyota Tacoma 2003

List of elements for 4WD Wiring Diagram, with 2-4 Select Switch for Toyota Tacoma 2003:

• (dash harn, center of dash)
• (dash harn, right side of dash)
• 2-4
• 2-4 select motor (on transmission)
• 2-4 select switch
• 4wd
• 4wd ecu (below center of dash)
• 4wd fuse 20a
• 4wd ind
• A/t indicator switch
• A/t p ind
• Abs actuator w/ecu (right rear of engine compt)
• Add
• Add actuator (near right rear of engine)
• Add detection switch
• Add limit switch
• B17
• B19
• C10
• C13
• Combination meter
• D17
• D18
• D19
• D20
• Detection switch (transfer 4wd position) (on transmission)
• Detection switch (transfer l4 position) (on trans- mission)
• Detection switch (transfer neutral position) (on trans)
• Diode (a/t) (behind top left side of dash)
• Dl1
• Dl2
• Dm1
• Dm2
• E12
• E13
• Engine control module
• Exi
• Exi2
• F12
• F16
• G17
• G19
• G20
• Gauge fuse 10a
• Gnd
• H20
• H22
• Hot in on or start
• I12
• I13
• I14
• I9 (w/drl) i14 (w/o drl)
• Id (left kick panel)
• Ie (right side of dash)
• Ig (left side of dash)
• Ind
• 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 13 (above glove box)
• Park/neutral position switch (on trans)
• Pnk
• Rear differential lock ecu (on upper left kick panel)
• Red
• Spd
• Speedometer
• Tfn
• Tl1
• Tl2
• Tm1
• Tm2
• Vehicle speed sensor (on transmission)
• W/ tach
• W/o tach

4WD Wiring Diagram, without 2-4 Select Switch for Toyota Tacoma 2003

List of elements for 4WD Wiring Diagram, without 2-4 Select Switch for Toyota Tacoma 2003:

• (2.7l)
• (3.4l)
• (dash harn, right side of dash) i12
• (dash harn, right side of dash) i14
• (on upper left kick panel) rear differential lock ecu
• (right rear of eng compt) abs actuator w/ecu
• 2wd
• 4wd
• 4wd fuse 20a
• 4wd ind
• A/t indicator switch
• A/t p ind
• Add actuator (near right rear of engine)
• Add detection switch
• Add limit switch
• Add motor
• C10
• C13
• Combination meter
• D18
• D19
• D20
• Detection switch (transfer 4wd position) (on transmission)
• Detection switch (transfer l4 position) (on transmission)
• Detection switch (transfer neutral position) (on transmission)
• Diode (a/t) (behind top left side of dash)
• E11
• E12
• Engine control module (behind right side of dash)
• Exi
• Exi2
• Gauge fuse 10a
• Gnd
• H20
• H22
• Hot in on or start
• I13
• I14
• I9 (dash harn, center of dash)
• Ie (right side of dash)
• 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 13 (above glove box)
• Park/neutral position switch (on transmission)
• Rel1
• Rel2
• Tfn
• Transmission control relay (on upper right kick panel)

Rear Differential Lock Wiring Diagram for Toyota Tacoma 2003

List of elements for Rear Differential Lock Wiring Diagram for Toyota Tacoma 2003:

• (dash harn, right side of dash) i12
• (w/ 2-4 select switch)
• (w/o 2-4 select switch)
• 2.7l
• 3.4l
• 4wd
• 4wd ecu (w/ 2-4 select switch) (below center of dash)
• 4wd fuse 20a
• A/t
• A/t w/ abs
• A22
• Abs actuator with ecu (w/ abs) (right rear of engine compt)
• C10
• C13
• Combination meter
• D11
• D16
• D19
• Detection switch (transfer l4 position) (on transmission)
• Engine control module (behind right side of dash)
• Exi
• Exi2
• F12
• F16
• Free
• G17
• G18
• Gauge fuse 10a
• Gnd
• H21
• H22
• Hot in on or start
• I12
• Ie (right side of dash)
• Ig (left side of dash)
• J/b 1 (behind left side of dash)
• J/b 3 (center) (behind center of dash)
• J/b 3 (left) (above steering column)
• J/c 13 (above glove box)
• Limit switch
• Lock
• M/t
• M/t w/ abs
• Pnk
• Rear differential lock switch
• Rear differential lock detection switch
• Rear differential lock ecu (upper left kick panel)
• Rear differential lock indicator
• Rear differential lock motor
• Rel1
• Rel2
• Rlp
• Spd
• Speed

2.4L

2.4L, A/T Wiring Diagram for Toyota Tacoma 2003

List of elements for 2.4L, A/T Wiring Diagram for Toyota Tacoma 2003:

• Batt
• Cruise control system
• D13
• D17
• D18
• D19
• D20
• Data link connector 3 (below left center of dash)
• Ea (left front fender)
• Ecu-ig fuse 15a
• Ef (ignition coil bracket)
• Efi fuse 20a
• Efi relay (r/b 2)
• Engine control module (behind right side of dash)
• Engine controls
• Engine coolant temperature sensor (on rear of eng)
• F11
• G14
• G17
• G22
• Gauge fuse 10a
• Hot at all times
• Hot in on or start
• I12
• I13 (dash harn, right side of dash)
• Idlo
• Ie (right side of dash)
• Ign fuse 7.5a
• Instrument cluster system
• J/b 1 (behind dash, left side of steering column)
• J/b 3 (left) (behind dash, above steering column)
• J/c 11 (above glove box)
• J/c 13 (above glove box)
• J/c 9, j/c 10 (left side of engine compt)
• J10
• Nsw
• O/d ecu (below center of dash)
• O/d main switch
• O/d solenoid (on transmission)
• Od off
• Od1
• Odlp
• Odms
• Park/neutral position switch (on transmission)
• R/b 2 (left side of engine compt)
• Sol
• Sp1
• Speedo
• Sta
• Starting system
• Stop fuse 10a
• Stoplight switch (on bracket, above brake pedal)
• Stp
• Throttle position sensor (on throttle body)
• Thw
• Vta

2.7L

2.7L, A/T Wiring Diagram for Toyota Tacoma 2003

List of elements for 2.7L, A/T Wiring Diagram for Toyota Tacoma 2003:

• (dash harn, right side of dash) i13
• (r/b 2)
• (right side of dash) ie
• A/t oil temp sensor (on transmission)
• A/t p ind
• Batt
• Cruise control system
• D13
• D18
• D19
• Data link connector 3 (below left center of dash)
• Ea (left front fender)
• Ect pwr
• Ef (ignition coil bracket)
• Efi fuse 20a
• Efi relay
• Electronic controlled transmission solenoids (on transmission)
• Electronically controlled transmission pattern select switch
• Engine control module (behind right side of dash)
• Engine controls
• Engine coolant temperature sensor (rear of eng)
• F11
• G22
• Gauge fuse 10a
• Hot at all times
• Hot in on or start
• I12
• I13
• I13 (dash harn, right side of dash)
• Idl0
• 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/c 11 (above glove box)
• J/c 9, j/c 10 (left side of engine compt)
• J10
• No. 1
• No. 2
• No. 3
• Nsw
• O/d main switch
• Od off
• Od1
• Odlp
• Odms
• Oil temp
• Oil-w
• P ind
• Park/neutral position switch (on transmission)
• Pnk
• Pwr
• R/b 2 (left side of engine compt)
• Red
• Sp1
• Sp2+
• Sp2-
• Speedo
• Sta
• Starting system
• Stop fuse 15a
• Stoplight switch (on bracket, above brake pedal)
• Tfn
• Tho
• Throttle position sensor (on throttle body)
• Thw
• Vehicle speed sensor (for ect) (on transmission)
• Vta

3.4L

3.4L, A/T Wiring Diagram for Toyota Tacoma 2003

List of elements for 3.4L, A/T Wiring Diagram for Toyota Tacoma 2003:

• (dash harn, right side of dash)
• (left side of engine compt) j/c 9, j/c 10
• (near the throttle body)
• (right front fender) ea
• +bm
• A/t oil temperature sensor (on transmission)
• A/t p ind
• Batt (b+)
• D13
• D18
• D19
• Data link connector 3 (below left center of dash)
• E1 (grd)
• E10
• Ect pwr
• Ects fuse 15a
• Efi fuse 20a
• Efi relay (on r/b 2)
• Electronic controlled transmission solenoids (on transmission)
• Electronically controlled transmission pattern select switch
• Engine control module (behind right side of dash)
• Engine controls system
• Engine coolant temperature sensor (left front of engine)
• F11
• G17
• G22
• Gauge fuse 10a
• Hot at all times
• Hot in run or start
• I12
• I13
• Ig (left side of dash)
• Ign fuse 7.5a
• Igsw
• J/b 1 (behind dash, left of steering column)
• J/b 3 (behind dash, above steering column)
• J/c 11 (above glove box)
• J10
• Mrel
• Nsw
• O/d main switch
• Od off
• Od2
• Odms
• Oilw
• Park/neutral position switch (on transmission)
• Pnk
• Pwr
• R/b 2 (left side of engine compt)
• Red
• Slt
• Slt+
• Slt-
• Sp1
• Sp2+
• Sp2-
• Speedo
• Sta
• Starting system
• Stop fuse 15a
• Stoplight switch (on bracket, above brake pedal)
• Stp
• Temp a/t oil
• Tfn
• Thoc
• Throttle position sensor (on throttle body)
• Thw
• Vehicle speed sensor (for ect) (on transmission)
• Vta
• Vta2