Tuner Resources

2002 - 2004 Subaru Impreza WRX ECU Diagram

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Connector D

Pin #

Name

Signal Type

D1

Injector # 1

Speed

D8

Power Ground

Ground

D19

O2 Sensor Signal (Front)

Analog

Connector C

Pin #

Name

Signal Type

C4

Injector # 4

Speed

C5

Injector # 3

Speed

C6

Injector # 2

Speed

C8

Power Ground (Injector)

Ground

C9

Tach Signal

RPM

C18

Power Ground (Coils)

Ground

Connector E

Pin #

Name

Signal Type

E1

Power Ground

Ground

E7

Mass Air Flow Sensor Ground

Ground

E13

Mass Air Flow Sensor

Analog

Connector B

Pin #

Name

Signal Type

B7

Throttle Position Sensor

Analog

B8

Manifold Atmospheric Pressure Sensor

Analog

B17

O2 Sensor Signal (Rear)

Analog

B18

Engine Coolant Temperature Sensor

Analog

B19

Sensor Ground

Ground

B27

Intake Air Temperature Sensor

Analog

Connector A

Pin #

Name

Signal Type

A1

Vehicle Speed Sensor

Speed

 

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