Fault code pulling - 1988 5000 TQ

[Alex Kowalski]

Tony,

According to SJM and my Bentley, the extra contacts on the fuel pump relay are connected to Pin 31 of the ECU and to ground, connector ILa on the Fuse/Relay panel.  In the Bentley, connector T14a/14 at the instrument panel is connected to the "Knock Sensor Lite" (as it is called in the diagram, a little confusingly.) 

Also there are two separate functions that can be activated by bridging the relay - pulling the fault codes, or activating the ECU output tests. 

http://www.sjmautotechnik.com/trouble_shooting/ecuf.html#fc5kt

HTH,
Alex Kowalski
'87 5KCSTQ


> Message: 5
> Date: Thu, 27 Jan 2005 08:57:15 -0800 (PST)
> From: Tony Hoffman <tfh400036 at yahoo.com>
> Subject: Fault code pulling - 1988 5000 TQ
> To: quattro at audifans.com
> Message-ID: <20050127165716.60695.qmail at web53902.mail.yahoo.com>
> Content-Type: text/plain; charset=us-ascii
> 
> Does anyone know which terminals you would use for the LED indicator when 
> pulling codes. My check engine light appears to be burned out. I have a check 
> box I've built, and want to use it. Also, can anyone verify that the two 
> terminals on the top of the FP relay triggers the sequence.
>  
> Tony Hoffman