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Post by stelte on Mar 16, 2005 10:17:47 GMT -6
Just recently my "Traction Control Off" light comes on and stays on. When you first start the car it is off for about a minute then comes on and stays on. I'm not sure if the traction control works or not when this light is on since we haven't had any snow lately. Has anyone had this problem? If so, how did you fix it?
I'm thinking that one of the wheel speed sensors might be bad and the computer recognizes that it is getting non-sense data from it and turns off the traction control. But, that is just a guess... If I had the computer codes scanned, would it tell what sensor is bad?
Dave
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Post by JimW on Mar 16, 2005 10:39:10 GMT -6
Yes, however does your ABS light come on as well?
Does the TC engage while on a roll? We could be looking at different things here.
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Post by stelte on Mar 16, 2005 11:08:02 GMT -6
The ABS light does not come on. I dont know if the ABS is working or not since we dont have any slick pavement right now.
I did have a problem a while back where the traction control seemed to be coming on for no apparent reason (eg., while stopped at a light). This problem went away all by itself.
Dave
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Post by JimW on Mar 16, 2005 11:13:16 GMT -6
Ok, well if the ABS light was to come on I would be more concerned. That would indicate an open fault on the WSS. First thing to do before spending money, is check to make sure the wiring harness is properly fitted behind the tire. Then get a scan, it MAY be the ETCBM and a lack of communication between the TC and ETCBM (brake computer) or a bad WSS.
let us know..and good luck
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Post by stelte on Mar 16, 2005 12:36:57 GMT -6
Will a computer scan point to specific problems like the WSS?
I have a 95 Aurora. Do you know of any Auto parts stores that do scans for free?
Dave
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Post by stelte on Mar 16, 2005 12:40:05 GMT -6
PS - WSS seem to be pretty simple - a coil of wire around a piece of metal, so I'm not sure how they could go bad. If you say that an open WSS will bring on the ABS light permanently, that pretty well rules out the only fault mode for a WSS that I can think of. Have you ever heard of a brake computer going bad?
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Post by JimW on Mar 16, 2005 13:17:54 GMT -6
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Post by stelte on Mar 16, 2005 15:54:51 GMT -6
You mean that the Wheel Speed Sensor isn't changeable all by itself? Changing the whole wheel hub sounds like a lot of work and a small fortune.
BTW - I've been assuming that the problem is the front wheels, not the back. Is that an appropriate assumption?
Dave
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Post by JimW on Mar 16, 2005 16:49:50 GMT -6
I would hope so, the car is FWD, so the traction control would only engage on the drive wheels.
And yes, its not just a sensor, you need to replace the hub. Dealer wanted over $400 CDN for the job. I got the part for $230 and did the work with a friend.
Now, heres something interesting. GM tech books state this is a 1hr shop task, so they could only bill you for 1hr. In the state my hub was in, it would have taken 2hrs and many tools, but I would only be charged book time. We had a discussion about GM labour rates and how book time doesnt equate to labour charges, however in this case, had I gone to the dealer....I would have gotten a deal (in a sense)
Sorry to ramble there, but get scanned, lets us know the problem and take it from there.
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Post by stelte on Mar 21, 2005 16:08:02 GMT -6
Before I spend $80-$100 getting a scan, I thought that I would check the cables and connectors between the WSS and the brake computer module. Where is the ETCBM (brake computer) module located?
Also, is there a TC module somewhere or does the brake computer handle everything?
My experience with electronic modules is that the cable connectors are the least reliable part of the system and are usually the problem. (corrosion and water leakage).
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Post by bLACk AurOrA on Mar 21, 2005 16:55:49 GMT -6
take it to advanced auto parts or autozone first. they scan for free but rarely seem to help. when u tell them you have a 95 they will tell u they cant scan it but tell them u have the port for it.
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Post by stelte on Mar 21, 2005 17:02:39 GMT -6
We don't have an Advanced Auto Parts here, but do have an Autozone. I've tried to have them scan it before, but the scanners they have at Autozone are not compatible with the connector type on my 95. I believe that 95 was the transition year on the scanner connector. Some 95 Auroras have the new connector and some the old. Mine has the old.
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Post by JimW on Mar 21, 2005 22:02:41 GMT -6
Before I spend $80-$100 getting a scan, I thought that I would check the cables and connectors between the WSS and the brake computer module. Where is the ETCBM (brake computer) module located? Also, is there a TC module somewhere or does the brake computer handle everything? My experience with electronic modules is that the cable connectors are the least reliable part of the system and are usually the problem. (corrosion and water leakage). ETCBM is located on the driver side strut tower. |
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