Re: '87 5KQ pinout for ECU....

[Charlie Smith <quattro@elektro.cmhnet.org>]

Earlier, MHLIGGINS@aol.com wrote:
> 
>     I'm still trying to find what I believe is a ground fault in one of the 
> '87 5K quats. I'd like to find a listing of what the ECU pins are for. The 
> copy of the Bentley I have shows the pin out for the older ECUs, and, it 
> seems, the newer ones (CIS-E 3), but not my specific model. I have to assume 
> the CIS-E 3 is not my car because one of the tests is to connect wire 34 with 
> something else and that wire is cut on the '87s (got two cars and that wire 
> is cut on both.) Where can I find a pinout diagram? I checked Scott Mockry's 
> site and he has the diagnostic procedures listed, but I didn't see the pinout.

The MAC-10/11 ECU has a couple wires cut just out of the plug, and these
are for the turbo engine with an automatic transmission.  One wire tells the
ECU that the transmision is in first gear so the ECU keeps the boost down
and the other one is for something similar - designed to promote the life
of the wimpy transmission.  The Bentley doesn't mention this I don't think.

    - Charlie