Fan Blower ECM Pin-Out Location G4 WRX/STI V7-9

[Steven Bicknell]

Hi, does anyone know the correct location for connecting the GR wire from the blower fan relay to the G4 Link ECU WRX/STI V7-9?

That GR wire is currently housed in A9 B134 on my USDM/JDM hybrid harness which apparently connects to nothing on the Link.
(Note that I am not referring to the A/C relay that connects to aux inj-8.)

I've attached the wiring diagram from an 06 USDM STI to illustrate the wire I am referring to (marked in red). Where it connects to on the ECU in this diagram is irrelevant as my engine/harness is from a JDM EJ207 Version 8 . All other associated wiring with the blower checks out in continuity and voltage, so I'm 99% sure the incorrect connection to the ECU is to blame for the lack of response when I turn the fan dial. 

Any help is greatly appreciated.

Cheers

 

[Adamw]

That wire is not your problem, it is only used as a signal to the ecu to force the alternator out of low voltage/economy mode.  It is not connected to anything in our WRX104 ecu as our ecu doesnt control the alternator - it just runs in normal mode all the time.

It is the AC control module that grounds that wire to turn the blower relay on.

[Steven Bicknell]

Thanks Adam, for your reply. I don't have the AC operational and likely won't re-install the lines, so what do I need to do to get the blower working?  Just ground it directly to the AC control module?

Cheers

 

Steve

[Adamw]

Im not sure to be honest.  Those AC control units are a black box of magic with more electronics than the space shuttle inside.  

It might be a question for a subaru specific forum.  But as far as I know, the AC unit needs no interaction from the engine ecu.

[Steven Bicknell]

OK, thanks.