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Registered
Join Date: Sep 2009
Location: North of You
Posts: 9,160
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964 ABS Lights - No Fault Message
My 1990 964C4 is almost 100% fixed after sitting for a few years.
Unfortunately, I still get the ABS light and the AWD light after about 20 seconds of idling, even if I don't move the car, I get the fault. I previously diagnosed (and repaired) my acceleration sensor using Scantool. But this time there is no stored fault, and I can't connect to the ABS while the car is running. (I'm not sure if this is normal, I connect to Motronic while I'm driving but not the ABS system) Does anyone know the 'start-up' sequence for the ABS? I am thinking that the fact I get the error without moving means I have a comms problem, or maybe a pump issue? It is probably not wheel speed sensors, as they get checked when you start driving. I have bled everything, cleaned the pump electrical connector, etc. Any suggestions? I am out of ideas. 
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"A machine you build yourself is a vote for a different way of life. There are things you have to earn with your hands." Last edited by 1990C4S; 09-26-2023 at 10:53 AM.. |
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09-26-2023, 10:48 AM
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