ABS non-functional - no warning light
#1
Three Wheelin'
Thread Starter
ABS non-functional - no warning light
As the title says, I got my car back from it's service and brake refurb yesterday and was told that they discovered on the final road test that the ABS wasn't working although there is no warning light (bulb DOES work). It may be that the ABS hasn't been working in the 5 years I've had the car since I've never been in a situation where it would need to work.
Has anyone any ideas where to look first?? There was "an ABS relay - 928.618.931.02" replaced some years ago when I was searching for the demon ABS/PDAS alarm problem - which was subsequently narrowed down to coil and distributor cap problems and has never re-occurred since. I'm guessing that any major problem with the ABS controller would result in a warning light so, again, a guess, the problem may just be that the ABS system isn't being called into action even though the system itself is operational.
Suggestions please.
Regards
Dave
Has anyone any ideas where to look first?? There was "an ABS relay - 928.618.931.02" replaced some years ago when I was searching for the demon ABS/PDAS alarm problem - which was subsequently narrowed down to coil and distributor cap problems and has never re-occurred since. I'm guessing that any major problem with the ABS controller would result in a warning light so, again, a guess, the problem may just be that the ABS system isn't being called into action even though the system itself is operational.
Suggestions please.
Regards
Dave
#2
Nordschleife Master
Dave,
These are the same symptoms as mine. I discovered it wasn't working first time out with it at Donington. Removing all four speed sensors, cleaning them and vacuuming out the hubs where they fit, did the job for me.
These are the same symptoms as mine. I discovered it wasn't working first time out with it at Donington. Removing all four speed sensors, cleaning them and vacuuming out the hubs where they fit, did the job for me.
#5
Instructor
Join Date: Jun 2007
Location: Wiltshire, UK
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Hi Dave,
I posted an identical thread a while ago:
https://rennlist.com/forums/964-foru...ng-lights.html
Hope it helps.
Regards,
Adam
I posted an identical thread a while ago:
https://rennlist.com/forums/964-foru...ng-lights.html
Hope it helps.
Regards,
Adam