ENGINE PERFORMANCE – Subaru Impreza WRX STi 2005 – SYSTEM WIRING DIAGRAMS

ENGINE PERFORMANCE

2.0L TURBO

2.0L Turbo, Engine Performance Wiring Diagram (1 of 4) for Subaru Impreza WRX STi 2005

List of elements for 2.0L Turbo, Engine Performance Wiring Diagram (1 of 4) for Subaru Impreza WRX STi 2005:

• (behind right side of dash) gb-4
• (behind right side of dash) main relay
• (top right side of engine) ge-1
• A/t
• Acc
• Air conditioning system
• B134
• B135
• B136
• Camshaft position sensor (on left front of engine)
• Crankshaft position sensor (on lower front of engine)
• Defogger system
• Engine control module (behind right side of dash)
• Ge-1 (top right side of engine)
• Ge-2 (top left side of engine)
• Hot at all times
• Ignition switch
• Interior lights system
• Knock sensor (at center rear of engine)
• Left tumble generator valve (tgv)
• Lock
• M/t
• Mass airflow sensor (at right side of engine compt)
• Nca
• Neutral position switch (m/t)
• Off
• Power steering oil pressure switch (on front of engine)
• Red
• Right tumble generator valve (tgv)
• Shielded & sensor ground joint connector (behind right side of dash)
• Start
• Starting/ charging system
• Starting/charging system

2.0L Turbo, Engine Performance Wiring Diagram (2 of 4) for Subaru Impreza WRX STi 2005

List of elements for 2.0L Turbo, Engine Performance Wiring Diagram (2 of 4) for Subaru Impreza WRX STi 2005:

• (behind left side of dash) check connector
• (top right side of engine) ge-1
• A/t
• B125
• B152
• B52
• B54
• B55
• B56
• Engine coolant temperature sensor & thermometer (on top center of engine)
• Exhaust gas temperature sensor (in right exhaust system, near front oxygen sensor)
• F37
• Fuse & relay box (behind left side of dash)
• Fuse 15a
• Fuse 30a
• Hot at all times
• Hot in on or start
• Left tumble generator valve (tgv) angle sensor
• Line end connector
• M/t
• Main fuse box (on left side of engine compt)
• Nca
• Pressure sensor (at top rear of engine)
• Red
• Right tumble generator valve (tgv) angle sensor
• Throttle position sensor (on throttle body assembly)
• Transmission control module (behind left side of dash)
• Vehicle speed sensor (m/t) (on right side of transmission case)

2.0L Turbo, Engine Performance Wiring Diagram (3 of 4) for Subaru Impreza WRX STi 2005

List of elements for 2.0L Turbo, Engine Performance Wiring Diagram (3 of 4) for Subaru Impreza WRX STi 2005:

• (behind dash, left of steering column) data link connector
• (top right side of engine)
• (top right side of engine) ge-1
• (under left side of dash) line end check connector
• B158
• Combination meter
• Cpu
• Drain valve (under right rear of vehicle)
• Fuel level sensor
• Fuel pump
• Fuel pump assembly (on top of fuel tank)
• Fuel pump controller
• Fuel pump relay (behind right side of dash)
• Fuel sub level sensor (on top of fuel tank)
• Fuel tank pressure sensor (on top center of fuel tank)
• Fuel temperature sensor
• Fuse & relay box (behind left side of dash)
• Fuse 10a
• Gb-4 (behind right side of dash)
• Gb-7 (under right front seat)
• Ge-1
• Hot in on or start
• I/f
• I10
• I11
• I12
• Internal pressure solenoid valve
• Mal- function indicator light
• Oil pres- sure warning light
• Oil pressure switch (on front of engine)
• Pressure control solenoid valve (under center rear of vehicle)
• R58
• Red
• Speedometer
• Tachometer
• Temp gauge

2.0L Turbo, Engine Performance Wiring Diagram (4 of 4) for Subaru Impreza WRX STi 2005

List of elements for 2.0L Turbo, Engine Performance Wiring Diagram (4 of 4) for Subaru Impreza WRX STi 2005:

• (at left front of engine) fuel injector
• (at left rear of engine) fuel injector
• (at right front of engine) fuel injector
• (at right rear of engine) fuel injector
• (on top front of engine)
• (top right side of engine) ge-1
• Air conditioning system
• B137
• B84
• Cooling fans system
• Engine control module (behind right side of dash)
• Front oxygen (a/f) sensor (on front of catalytic converter)
• Ge-1 (top right side of engine)
• Idle air control solenoid valve
• Ignition coil 1
• Ignition coil 2
• Ignition coil 3
• Ignition coil 4
• Nca
• Pcv diagnosis connector
• Pnk
• Purge control solenoid valve (on intake manifold)
• Rear oxygen sensor
• Red
• Wastegate solenoid (at right side of engine compt)

2.5L

2.5L, Engine Performance Wiring Diagram (1 of 4) for Subaru Impreza WRX STi 2005

List of elements for 2.5L, Engine Performance Wiring Diagram (1 of 4) for Subaru Impreza WRX STi 2005:

• (behind right side of dash) electric control throttle relay
• (behind right side of dash) main relay
• (m/t)
• Air conditioning system
• B135
• B137
• Camshaft position sensor
• Crankshaft position sensor (on lower front of engine)
• Defogger system
• Engine control module (behind right side of dash)
• Fuse & relay box (f/b) (behind left side of dash)
• Fuse 15a b152
• Fuse 15a b52
• Ge-1 (top left side of engine)
• Ge-2 (top right of engine)
• Hot in on or start
• Interior lights system
• Nca
• Power steering oil pressure switch (at left front of engine)
• Red
• Shield & sensor ground joint connector (behind right side of dash)
• Starting/ charging system
• Transmissions system

2.5L, Engine Performance Wiring Diagram (2 of 4) for Subaru Impreza WRX STi 2005

List of elements for 2.5L, Engine Performance Wiring Diagram (2 of 4) for Subaru Impreza WRX STi 2005:

• (behind dash, left of steering column) data link connector
• (behind left side of dash) check connector
• 15a
• A/f & o2 relay
• B125
• B126
• B75
• B76
• Diagnosis terminal
• Electric throttle control (on top rear of engine)
• Engine coolant temperature sensor & thermometer (on top left front of engine)
• F35
• F37
• Fuse 30a
• Gb-5 (behind center of dash)
• Ge-1 (top left side of engine)
• Hot at all times
• Ignition coil & ignitor
• Line end connector
• Main fuse box (m/b) (on left side of engine compt)
• Manifold pressure sensor
• Pnk
• Red
• Relay block
• Sbf 1 fuse 100a
• Sbf 5 fuse 30a
• Sbf holder (on left side of engine compt)
• Test mode connector
• Vehicle speed sensor (m/t) (on right side of transmission case)

2.5L, Engine Performance Wiring Diagram (3 of 4) for Subaru Impreza WRX STi 2005

List of elements for 2.5L, Engine Performance Wiring Diagram (3 of 4) for Subaru Impreza WRX STi 2005:

• B158
• Combination meter
• Custom cpu
• Fuel level sensor
• Fuel pump
• Fuel pump assembly (on top of fuel tank)
• Fuel pump relay (behind right side of dash)
• Fuel sub level sensor (on top of fuel tank)
• Fuel tank pressure sensor (on top center of fuel tank)
• Fuel temperature sensor
• Fuse & relay box (f/b) (behind left side of dash)
• Fuse 10a
• Gb-7 (under right front seat)
• Hot in on or start
• I/f
• I10
• I11
• I12
• Internal pressure solenoid valve
• Mal- function indicator light
• Oil pressure switch (on front of engine)
• Oil pressure warning light
• Pressure control solenoid valve (under center rear of
• Red
• Speedometer
• Tachometer
• Temp gauge
• Vehicle)
• Vent control solenoid valve (under right rear of vehicle)

2.5L, Engine Performance Wiring Diagram (4 of 4) for Subaru Impreza WRX STi 2005

List of elements for 2.5L, Engine Performance Wiring Diagram (4 of 4) for Subaru Impreza WRX STi 2005:

• (at left front of engine) fuel injector 2
• (at left rear of engine) fuel injector 4
• (at right front of engine) fuel injector 1
• (at right rear of engine) fuel injector 3
• (behind left side of dash) accelerator position sensor
• (on rear of engine) knock sensor
• (top left side of engine) ge-1
• B134
• B136
• B55
• B56
• Cooling fans system
• Cpc solenoid
• Cruise control system
• Egr valve (at right rear of engine)
• Engine control module (behind right side of dash)
• Front oxygen (a/f) sensor (on front of front catalytic converter)
• Ge-1 (top left side of engine)
• Joint earth connector
• Mass air flow sensor
• Nca
• Pnk
• Rear oxygen sensor
• Red
• Transmission control module (behind left side of dash)

2.5L TURBO

2.5L Turbo, Engine Performance Wiring Diagram (1 of 4) for Subaru Impreza WRX STi 2005

List of elements for 2.5L Turbo, Engine Performance Wiring Diagram (1 of 4) for Subaru Impreza WRX STi 2005:

• (behind right side of dash) electric throttle relay
• (behind right side of dash) main relay
• Air conditioning system
• B135
• B137
• B152
• B271
• B52
• Cooling fans system
• Crankshaft position sensor (on lower front of engine)
• Defogger system
• Engine control module (behind right side of dash)
• Fuse & relay box (f/b) (behind left side of dash)
• Fuse 15a
• Fuse 20a
• Ge-1 (top left side of engine)
• Ge-2 (top right of engine)
• Hot in acc or on
• Hot in on or start
• Ignition coil 1 (at right front of engine)
• Ignition coil 2 (at left front of engine)
• Ignition coil 3 (at right rear of engine)
• Ignition coil 4 (at left rear of engine)
• Interior lights system
• Nca
• Pcv diagnosis connector
• Power steering oil pressure switch (at left front of engine)
• Red
• Shield & sensor ground joint connector (behind right side of dash)
• Starting/charging system

2.5L Turbo, Engine Performance Wiring Diagram (2 of 4) for Subaru Impreza WRX STi 2005

List of elements for 2.5L Turbo, Engine Performance Wiring Diagram (2 of 4) for Subaru Impreza WRX STi 2005:

• (behind dash, left of steering column) data link connector
• (behind left side of dash) check connector
• (on right side of transmission case)
• B125
• B75
• B76
• Diagnosis terminal
• Electric throttle control (on top rear of engine)
• Engine coolant temperature sensor & thermometer (on top left front of engine)
• F37
• Gb-3
• Gb-5 (behind center of dash)
• Ge-2 (top right of engine)
• Hot at all times
• Intercooler water spray switch
• Intercooler water spray timer (behind right side of dash)
• Interior lights system
• Left tgv angle sensor
• Line end connector b126
• Main fuse box (m/b) (on left side of engine compt)
• Nca
• Neutral position switch
• Pressure sensor
• Red
• Right tgv angle sensor
• Sbf 5 fuse 30a
• Test mode connector
• Vehicle speed sensor

2.5L Turbo, Engine Performance Wiring Diagram (3 of 4) for Subaru Impreza WRX STi 2005

List of elements for 2.5L Turbo, Engine Performance Wiring Diagram (3 of 4) for Subaru Impreza WRX STi 2005:

• (at left side of engine) left active valve control solenoid
• (at right side of engine) right active valve control solenoid
• (behind center of dash) driver's control center differential control module
• B158
• B380
• Combination meter
• Drain valve (under right rear of vehicle)
• Fuel level sensor
• Fuel pump
• Fuel pump assembly (on top of fuel tank)
• Fuel pump control module (sedan: at right side of trunk) (wagon: behind right rear quarterpanel)
• Fuel pump relay (behind right side of dash)
• Fuel sub level sensor (on top of fuel tank)
• Fuel tank pressure sensor (on top center of fuel tank)
• Fuel temperature sensor
• Fuse & relay box (f/b) (behind left side of dash)
• Fuse 10a
• Gb-3
• Gb-4 (behind right side of dash)
• Gb-7 (under right front seat)
• Gb-8 (sedan: near license plate light) (coupe: under right taillight assembly)
• Hot in on or start
• I/f
• I10
• I11
• I12
• Intercooler water spray motor & level warning switch
• Intercooler water spray tank level warning light
• Internal pressure solenoid valve
• Mal- function indicator light
• Micro computer
• Nca
• Oil pres- sure warning light
• Oil pressure switch (on front of engine)
• Pressure control solenoid valve (under center rear of
• Red
• Speedometer
• Tachometer
• Temp gauge
• Vehicle)

2.5L Turbo, Engine Performance Wiring Diagram (4 of 4) for Subaru Impreza WRX STi 2005

List of elements for 2.5L Turbo, Engine Performance Wiring Diagram (4 of 4) for Subaru Impreza WRX STi 2005:

• (at left front of engine) fuel injector 2
• (at left rear of engine) fuel injector 4
• (at right front of engine) fuel injector 1
• (at right rear of engine) fuel injector 3
• (behind left side of dash) accelerator position sensor
• (behind right side of dash) shield & sensor ground joint connector
• (on rear of engine) knock sensor
• (top right of engine) ge-2
• B122
• B134
• B136
• Cruise control system
• Engine control module (behind right side of dash)
• Front oxygen (a/f) sensor (on front of front catalytic converter)
• Ge-1 (top left side of engine)
• Left active valve control angle sensor
• Left tumble generator valve (tgv) (at left rear of engine)
• Mass air flow sensor
• Nca
• Pnk
• Purge control solenoid valve (on intake manifold)
• Rear oxygen sensor
• Red
• Right active valve control angle sensor
• Right tumble generator valve (tgv) (at right rear of engine)
• Waste gate solenoid (at right side of engine compt)