2005 Subaru STI ECU Pinouts

2005 Subaru STI ECU Pinouts

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We break down the relevant STI ECU Pinout for the 2005 Subaru WRX STI, and show you what wires you will need if you are swapping, repairing or working on your vehicle.

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WRX STI

We’ll be going over the STI ECU Pinout for the 2005 Subaru WRX STI, found in the Second Generation Impreza. The EJ25 is a terrific powerplant, and excels at bolt on performance and even in a motor swap candidate role.

2005 Subaru WRX STI

2005 Subaru WRX STI ECU PINOUT
2005 Subaru WRX STI ECU PINOUT

POWER AND RELAYS

Wire # Name Signal
B 5 Control Unit Power Supply Power
B 6 Control Unit Power Supply Power Relay
C 16 Sensor Power Supply Power

ENGINE INPUTS

Pin # Name Signal Type
B 26 Vehicle Speed Sensor Speed
C 29 Throttle Sensor Output SUB 1-4 volts
C 22 Manifold Absolute Pressure Signal 0-5 volts
C 18 Throttle Sensor Output 0-3 volts

ENGINE VITALS

Pin # Name Signal Type
C 25 Knock Sensor +0 Value
C 13 Air Intake Temperature +0 Value
A 14 Engine Speed 0-13

ENGINE SWAP ESSENTIALS

Pin # Name Signal Type
A 33 Front 02 2.8-3.2
D 7 Injector Ground Ground
B 12 Ignition Ground Ground
D 1 and 2 ECU Ground Ground
B 1 and 4 Ground Ground
A 1 Clutch Switch Analog

Need more information on the STI ECU Pinout in your Subaru? leave us a comment below and ask your question, and we’ll be more than happy to help you with your STI ECU Pinout.

EDIT – 2008 Subaru STI VCD PINOUT Diagram as requested by user Lecomte.

08stivss

1 COMMENT

  1. Hello, I need more information on the STI ECU Pinout in my Subaru STI sedan of 2010. Can you help me ? I’m looking for vehicle speed sensor.
    Thanks

    • Hi Lecomte,

      Your Subaru VCD is sent directly to your instrument cluster in your STI. If your sedan is equipped with navigation, it also refers to this wire.

      Your Subaru instrument cluster is a 40 pin connector, and the VCD is PIN 31. We’ve added the diagram above to help you out. Hope that helps, let us know how the project turns out.

      Thanks for commenting

      • Thank you very much. GPS of my Pioneer AVIC-F860 working now correctly.

        I have an other project. I would like to install advanced keyless entry system and push start ignition system but I don’t find correct pin-out. Can you help-me ?

        I’m looking for :
        – negative trunk release
        – positive Parking light
        – negative-triggered door lock signal
        – negative-triggered door unlock signal
        – negative horn control
        – positive start
        – positive ON 2 / 2nd ignition Output
        – positive ON 1 / Primary ignition Output
        – negative neutral safety switch
        – positive brake input

        Thanks.

        • Lecomte, glad to hear you got your issue worked out.

          We don’t have these wiring schematics quite yet, but we’re working on a new section to My Pro Street that will include vehicle wiring pinouts for car stereos, alarms and keyless entry projects like yours.

          Stay tuned for more updates and thanks again for commenting!

  2. where car i locate the connector whit the pinn 2005 wrx sti
    Pin # Name Signal Type
    B 26 Vehicle Speed Sensor Speed

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