Where is the ECU on an 1992 Audi 100? [Archive] - Audi Forums

: Where is the ECU on an 1992 Audi 100?

10-17-2006, 08:39 AM
Thought I had found the ECU under the rear passenger seat but turns out it's the ABS ECU - where is the main ECU - passenger footwell like on the 80? How do I know if the ECU is at fault - car starts perfectly and smoothly but dies after about 10 seconds for no apparent reason!

10-17-2006, 02:47 PM
i have the same problem. is your car manual or automatic? can you send pics?

10-17-2006, 04:48 PM
I will post a photo but the car is with a garage at the mo to find out why it's not running. It's a manual 2.0 8v (AAD) - I think (having read more of the Haynes manual) the ECU might be behind the carpet on the passenger side in a black plastic sleeve - I can't check though!

10-18-2006, 12:37 PM

10-18-2006, 01:34 PM
Thankyou for the diagram - found it! The ECU is apparently fine it turns out - the garage who have my car have got it to run perfectly however only upto 2000 rpm! They reckon it needs a new fuel pump (160!!!!) but they can't be 100% sure that it is the problem?? I've checked for vacuum leaks - can't find any. The pump works but could it be low pressure and still work?