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09-11-18, 10:40 AM | #1 | |
Newbie!
Join Date: Sep 2017
Posts: 10
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1994 Audi Coupe 2.0e ABS issues
Hi guys.
Wonder if you can help. I have been fixing up an 80 Coupe for the past couple of years. Its now ready for MOT but i cannot get the ABS light out. Now all brakes have been removed, renewed, subframe off etc so everything is new. I cannot remember if the light was on when i got it, as it didnt run. Ive had it on VCDS and the ABS controller cannot be communicated with. Ive checked the ABS ECU and and got a spare to try that but makes no difference. Only thing i can find is that the ABS ECU only gets a 6v feed - without a diagram im not sure if thats enough or if the only feed required? Any thoughts? |
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09-11-18, 11:07 AM | #2 |
4 ring whore!
Classic Audi Club Member
Join Date: Mar 2008
Location: Stockport
Posts: 2,348
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Have you checked the fuse on the ABS relay? it's located under the dash behind the ign switch:
I've had a relay die, which is why I have a photo of one
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1992 80 quattro 20vt |
09-11-18, 11:16 AM | #3 |
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Join Date: Sep 2017
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Hi, i saw this on another forum so went looking for that relay, but cannot find it, do all Coupes have them? Cheers
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09-11-18, 11:28 AM | #4 |
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09-11-18, 11:55 AM | #5 |
Aero Advocate
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Join Date: Aug 2014
Location: Lancashire
Posts: 1,448
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If its not where Ben said that ABS relay also can sometimes live under the back seat...
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-1987 90 2.2E / Sapphire Blue (Rest in Pieces) -1989 90 quattro with Sport Equipment / Satin Black -1997 A4 Avant quattro TDI 110 / Tropical Green (Sold) |
09-11-18, 01:22 PM | #6 | ||
4 ring whore!
Classic Audi Club Member
Join Date: Mar 2008
Location: Stockport
Posts: 2,348
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Looking through some Audi B4 pdf's, it states (for LHD):
Quote:
Quote:
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1992 80 quattro 20vt |
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09-11-18, 01:31 PM | #7 |
4 ring whore!
Classic Audi Club Member
Join Date: Nov 2007
Location: Polmont
Posts: 2,617
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For a 94 car, there is no relay. It's all contained in the ecu under the rear seat.
If you start the car up, the ABS light should go off within 5 seconds. If it doesn't it's likely a pump / modulator fault since you've already swapped the ecu. There are 2 relays in the modulator which can be swapped out
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1991 90 quattro 20v sport 1991 90 quattro |
09-11-18, 02:22 PM | #8 |
Newbie!
Join Date: Sep 2017
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Thanks guys. Nah light stays on. It’s not turned a wheel for over ten years so I do wonder if once it’s had a drive it’ll sort itself out. I’ll keep you posted.
Cheers |
09-11-18, 03:03 PM | #9 |
Aero Advocate
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Location: Lancashire
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Good luck
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-1987 90 2.2E / Sapphire Blue (Rest in Pieces) -1989 90 quattro with Sport Equipment / Satin Black -1997 A4 Avant quattro TDI 110 / Tropical Green (Sold) |
10-11-18, 01:03 PM | #10 | |
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Join Date: Sep 2017
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Quote:
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