2.0 WRX and STi Standard Harness - Front Engine Documentation

1 Black w/Orange Stripe

Fuel Pump Power from FPC Pin 7

This will go to the power side of your fuel pump

2 Black w/White Stripe

Fuel pump ground to FPC Pin 6

This will go to the ground side of your fuel pump

3 Brown w/White Stripe

Fuel Level

Fuel Level Oputput → Ground the other side of the fuel level sensor to make this work. It also requires a pull-up resistor to 5v.

**not required**

4 Brown w/ Yellow Stripe

Reverse light output by turbo transmission plug

12V when reverse. Power is supplied via the 4-pin transmission plug and just needs to go through the reverse switch to supply power to this wire. Ground the other side of the light to the chassis

5 Blue w/Black Stripe

Fuel Temperature

Fuel Temperature signal from the fuel tank if the hanger has this feature
**not required**

6 Black w/Red Stripe

Engine Ground

Should be utilized to ground the fuel temperature and fuel level

1 White

Center Differential Signal 1

Goes to the DCCD coil

2 Black

Center Differential Signal 2

Goes to the DCCD coil

3 Blue

Throttle Position Signal

Ranges from 0-5V

4 Red

Ignition Power

12v when the key is in the on position

5 Brown

Parking Brake

When grounded (ebrake up) unit will open the center differential

6 Green

Ground

Chassis ground

1 Blue

Defrost Input to ECU

ECU adjusts when defrost is on (not required)

**not required**

2 Green w/Red Stripe

AC Switch

ECU adjusts when the AC switch is pressed (this is not the trigger for AC)

**not required**

3 Black w/White Stripe

Illumination

ECU adjusts when the lights are on

**not required**

4 Blue w/Yellow Stripe

AC Evap pin 2

12V input tells the ECU that the AC is being requested. Ground output on D27 for the compressor relay

5. Brown

AC Relay

Ground output to the AC compressor relay when A12 gets 12V for the AC request

1 Red w/Blue Stripe

Radiator Fan Power

12v when the ECU requests the radiator fans. Tie this into he power side of your radiator fan and ground the other side of the radiator fan

2 Green w/Red Stripe

Radiator Fan Power

12v when the ECU requests the radiator fans. Tie this into he power side of your radiator fan and ground the other side of the radiator fan

1 Red

12v input power

Tie into the ignition circuit coming from the chassis to power up the ECU/Engine fusebox. Make sure this has power while the start is cranking

2 Yellow

Starter Trigger

Tie this into the chassis where the key or switch triggers the starter (small tab on the back, not the battery). This ECU senses when the car is trying to crank so it can adjust and start the engine.

1 Light Green w/Black Stripe

ECU D22 Pressure Control Solenoid Valve

Ground output to the valve

2 Brown w/Yellow Stripe

ECU D11 Drain Valve

Ground output to the valve

3 Red w/Blue Stripe

ECU D23 Fuel Tank Sensor Control Valve

Ground output to the valve

4 Green w/Orange Stripe

ECU B15 Fuel Tank Pressure Sensor Pin1

0-5v Input

5 Blue w/White Stripe

Fuel Tank Pressure Sensor

Signal ground - Ties into shield joint gound that is fed by ECU pin B19 RG

6 Light Blue

Fuel Tank Pressure Sensor

Comes from 5v output on pin B9

7 Yellow w/Blue Stripe

Main Relay Output

12v Power for Boost Control, Injector (F60 Pin 1), ECU (D2/D3), MAF, Gast Tank Valves

8 Black w/Red Stripe

Engine Ground

Ground from the intake manifold (F60 Pin 16) to ECU (A7, A15, C1), Neutral Position, VSS, OBD, Test Mode, Fuel Level