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  #11  
Old 04-09-2014, 11:10 PM
Richard L Richard L is offline
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Default Re: Subaru WRX to HFS-3 wiring diagrams (2002-2009)

I need to update the HFS3v3 soon. Meanwhile, you can use the wiring diagram below:

http://www.aquamist.co.uk/vbulletin/...ead.php?t=2189
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  #12  
Old 11-02-2015, 06:53 PM
Dust Dust is offline
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Default Re: Subaru WRX to HFS-3 wiring diagrams (2002-2009)

Sorry to bring this back from the dead, but why cut boost and signal ECU? Can the ECU not do both? Just wondering...
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  #13  
Old 13-02-2015, 10:30 PM
Richard L Richard L is offline
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Default Re: Subaru WRX to HFS-3 wiring diagrams (2002-2009)

It wasn't clear, apologies, it was meant to be either/or.
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  #14  
Old 13-11-2015, 05:32 AM
kornshadow097 kornshadow097 is offline
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Default Re: Subaru WRX to HFS-3 wiring diagrams (2002-2009)

I had a short and an rechecking the wiring. The wiring of this diagram doesnt agree with the WRX ECU. I just measured current on each of the partially pink injector wires and all of them have a (+) signal, while your green wire states that it requires a (-) signal from the injector.

http://www.innovatemotorsports.com/r...ru_Impreza.php

This shows the same thing.

So is the polarity OK? Because I'm pretty sure most of the WRX if not all Impreza have a common ground and only "speed" (+) outputs to the ECU from their Injectors.
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  #15  
Old 13-11-2015, 08:23 AM
Richard L Richard L is offline
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Default Re: Subaru WRX to HFS-3 wiring diagrams (2002-2009)

There is nothing wrong with either diagrams.
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