ABS light comes on dash, just randomly not on all the time. Done it twice now but just pull over switch off and start again light goes out and stays out. Relay maybe or could this be the start of something more sinister!
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Ok, not sure if you can read codes on that early car. Have you got a black plug and a white plug on the side of the fuse box? You need an adapter (available on ebay) and a copy of VCDS (cheap version free from interweb) to read codes. If you are near West Wales I have full VCDS and can help.Nothelle S2 Avant
Black Ur project
Ocianic Ur project gone
S2 Coupe project gone
Urs6 plus project gone
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Dave is right - I'm not trying to be a smartass, just wanted to save you some time looking for diagnostic tools that are no use in this case.
Usually dead sensors or broken wires triggers light/error instantly, broken rings after short distance of driving. Incorrect gap between sensor and ring or some rust on the ring usually makes abs to work at very low, nearly stopping speeds. Never heard of control unit going bad.
Since restart cures the problem, it might be sticky relay (there's 2 of them in abs unit and one somewhere else) or solenoid causing this.
These intermittent issues are pita to catch out especially in this case where are no "error memory" you can read. I'd wait and see if it gets worse and then make measurements according to wiring diagram - http://s2central.com/S2_Schematics/D/D26.pdf
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