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E36 (1991 - 1999)
The E36 chassis 3-Series BMW was a huge hit among driving enthusiasts from the first moment the car hit the pavement. The E36 won numerous awards over the years it was produced and is still a favorite of many BMW enthusiasts to this day! -- View the E36 Wiki

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  #1  
Old 10-01-2012, 12:18 PM
flyboy1247 flyboy1247 is offline
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ABS/Traction Control

1994 325is. My ABS and Traction Control lights come intermittently while driving. I just replaced the Wheel Speed/ABS Sensors, but I still have the same problem. What do I look for next?
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  #2  
Old 10-04-2012, 11:14 AM
flyboy1247 flyboy1247 is offline
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Sorry my post is wrong. It is the ABS & ASC lights that are on.
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  #3  
Old 10-04-2012, 12:04 PM
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ZeGerman ZeGerman is online now
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Am I correct in assuming that you were experiencing these symptoms before you replaced the wheel speed sensors?
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  #4  
Old 10-04-2012, 12:40 PM
flyboy1247 flyboy1247 is offline
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That is correct. That was the reason for replacing them. I corrected my earlier post. It is actually the ABS and ASC light rather than the Traction Control Light.
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  #5  
Old 10-04-2012, 01:08 PM
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In that case, provided everything is plugged in correctly, it's most likely a faulty ABS control unit.
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1998 BMW 328is
1966 Pontiac GTO
2007 Subaru Impreza 2.5i 5-door
View my photos: Caught in the Wild
For sale: E30/E36 front sway links
For sale: OEM E36 328 catback
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  #6  
Old 10-04-2012, 01:13 PM
flyboy1247 flyboy1247 is offline
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Everything went back together just fine. Would a bad ABS unit cause the ASC light to come on?
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  #7  
Old 10-04-2012, 01:27 PM
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ZeGerman ZeGerman is online now
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Yes, because the ASC system uses the ABS to modulate wheel spin.

Also, perhaps it seems too simple, but have you checked all related fuses and relays?
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1998 BMW 328is
1966 Pontiac GTO
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View my photos: Caught in the Wild
For sale: E30/E36 front sway links
For sale: OEM E36 328 catback

Last edited by ZeGerman; 10-04-2012 at 01:28 PM.
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  #8  
Old 10-04-2012, 01:42 PM
flyboy1247 flyboy1247 is offline
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If a fuse or relay were bad, wouldn't the lights be on all of the time? They come on intermittently for no apparent reason. They come on sometimes when you apply the brakes, but they will also come while I am just driving down the highway.
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  #9  
Old 10-04-2012, 02:24 PM
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Yes, what you're experiencing does make it seem like a fuse or relay is not the issue, but they're worth checking nonetheless. Sometimes relays can get "sticky". But like I said before, if your wheel speed sensors are new and hooked up correctly, barring any fuse or relay issue, that pretty much only leaves the ABS control unit as the culprit.
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View my photos: Caught in the Wild
For sale: E30/E36 front sway links
For sale: OEM E36 328 catback
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  #10  
Old 10-04-2012, 03:58 PM
flyboy1247 flyboy1247 is offline
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I will check the fuses and relays first. Is there a test for the ABS Unit? I appreciate your help.
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  #11  
Old 10-04-2012, 04:17 PM
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I'm familiar with any kind of testing for the ABS unit, but others here may have some insight.
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1998 BMW 328is
1966 Pontiac GTO
2007 Subaru Impreza 2.5i 5-door
View my photos: Caught in the Wild
For sale: E30/E36 front sway links
For sale: OEM E36 328 catback
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  #12  
Old 04-07-2013, 12:31 PM
wheeler000 wheeler000 is offline
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all I can tell you is mine does the same thing
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  #13  
Old 04-07-2013, 07:03 PM
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Ive had the same problem since I got my car and havent had the chance to fix it but I'm going to test my sensors then deal with the abs unit if it doesnt get resolved.

I'll post an update with my solution for you and other people.

Sent from my SAMSUNG-SGH-I717 using Bimmer App
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  #14  
Old 04-07-2013, 08:06 PM
SCJon SCJon is offline
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You could also take a look at the underside of the intake boot. There is an inlet there that vacuum line comes from underneath that plugs into the boot. That line controls the vacuum for ASC. If it is jimmied up somehow then the light could be intermittent with a vacuum leak coming and going? Just a thought and free to check.
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  #15  
Old 04-08-2013, 05:56 AM
wheeler000 wheeler000 is offline
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mine magically stopped ...for now
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