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E36 M3 (1992-1999) {Euro - S50 B32 321hp @ 7400 rpm} {U.S. - S52 B32 240 hp @ 6000 rpm}
Total Produced: 71,212 - Years Produced: 1992 to 1999


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Old Fri, May-11-2018, 04:48:05 AM   #151
The Producer
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Default Re: The definitive guide to self diagnosing your ABS/ASC light.

scan for codes

but honestly - start w a 40 dollar ebay ABS sensor kit. when you take out each sensor to replace, cover a toothbrush in brakeclean and scrub the heck out of the inside of the hubs.

your problem could be 5 other things (ABS ECU, pedal sensor, ABS pump wiring etc), but the above is a low budget and low effort fix attempt.

smart people will have other ideas
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Old Sat, May-12-2018, 08:57:19 PM   #152
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Default Re: The definitive guide to self diagnosing your ABS/ASC light.

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Originally Posted by The Producer View Post
scan for codes

but honestly - start w a 40 dollar ebay ABS sensor kit. when you take out each sensor to replace, cover a toothbrush in brakeclean and scrub the heck out of the inside of the hubs.

your problem could be 5 other things (ABS ECU, pedal sensor, ABS pump wiring etc), but the above is a low budget and low effort fix attempt.

smart people will have other ideas

So far it looks like my abs relay is bad. Let’s hope that’s the only issue.

Last edited by motorsports_3; Sun, May-13-2018 at 11:32:24 PM.
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Old Tue, May-15-2018, 03:18:40 PM   #153
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Default Re: The definitive guide to self diagnosing your ABS/ASC light.

I changed out my ABS Relay and it somewhat fixed the issue. Before, as soon as the car turned on it would show the ABS/ASC lights, after swapping out the relay, it only turns on as soon as the car moves about 10 feet or so, if the car stay stationary it operates as normal.

That would lead me to believe its a bad WSS, am I wrong in thinking that?
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Old Wed, May-16-2018, 01:56:08 AM   #154
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Default Re: The definitive guide to self diagnosing your ABS/ASC light.

WSS seems a logical conclusion, yes.
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Old Fri, Aug-03-2018, 08:19:55 PM   #155
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Default Re: The definitive guide to self diagnosing your ABS/ASC light.

For anyone in the future, just to update, my issue was the brake pedal travel sensor. It passed all the tests, but it turned out to be a bad solder on the inside where the circuit board attaches to the plug.

I was able to take it apart and fix it for free.

My issue was that the light would come on randomly before, sometimes it would stay on for a day or two, and sometimes not turn on for a week. It would only come on after driving for about 200 feet or so.
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Discussing The definitive guide to self diagnosing your ABS/ASC light. in the E36 M3 (1992-1999) Forum - {Euro - S50 B32 321hp @ 7400 rpm} {U.S. - S52 B32 240 hp @ 6000 rpm}
Total Produced: 71,212 - Years Produced: 1992 to 1999 at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)