ABS/Traction control warnings
Thread Starter
Racer
Joined: Apr 2005
Posts: 385
Likes: 79
From: Norton ma
ABS/Traction control warnings
My car gets two warning lights when I drive over railroad tracks. Service ABS and service Traction control. What should I be looking for? Loose sensor? loose connection? Is this a common problem? My car is a 2002 Coupe A4. The lights reset themselves when the car is turned off. Next time I go over the tracks they come back on.
Thanks Laura (signed on my husbands account)
Thanks Laura (signed on my husbands account)
Tech Contributor
Joined: Dec 2003
Posts: 19,384
Likes: 87
From: Horncastle Lincolnshire, England
2023 C5 of the Year Finalist - Unmodified
Bill Curlee posted a great How To on checking grounds to fix this problem. I would guess that this is more likely than a component failure as you're getting the snag when the car is being jolted. Just a guess though.
PM me and I can send a copy of Bills summary.
PM me and I can send a copy of Bills summary.
Instructor
Joined: Sep 2006
Posts: 118
Likes: 0
From: Sun City CA
I'LL go one better.
I need to tag on to this post.
My Traction control does not selct on or off at all. When the ASR button is pressed nothing happens. I know handling is active when the rear wont break traction, but I can't deselect this, even though I shouldn't
Any help.
My Traction control does not selct on or off at all. When the ASR button is pressed nothing happens. I know handling is active when the rear wont break traction, but I can't deselect this, even though I shouldn't
Any help.
Tech Contributor
Joined: Dec 2003
Posts: 19,384
Likes: 87
From: Horncastle Lincolnshire, England
2023 C5 of the Year Finalist - Unmodified
Originally Posted by rubyjames
I need to tag on to this post.
My Traction control does not selct on or off at all. When the ASR button is pressed nothing happens. I know handling is active when the rear wont break traction, but I can't deselect this, even though I shouldn't
Any help.
My Traction control does not selct on or off at all. When the ASR button is pressed nothing happens. I know handling is active when the rear wont break traction, but I can't deselect this, even though I shouldn't
Any help.
Tech Contributor
Joined: Oct 1999
Posts: 41,058
Likes: 9,820
From: Charlotte, NC (formerly Endicott, NY)
Originally Posted by rubyjames
I need to tag on to this post.
My Traction control does not selct on or off at all. When the ASR button is pressed nothing happens. I know handling is active when the rear wont break traction, but I can't deselect this, even though I shouldn't
Any help.
My Traction control does not selct on or off at all. When the ASR button is pressed nothing happens. I know handling is active when the rear wont break traction, but I can't deselect this, even though I shouldn't
Any help.
Bill
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Advanced
Joined: Aug 2006
Posts: 91
Likes: 0
From: Corona CA
Looks like the TCS is sensitive on this car. Every time i turn off the TCS/AHS to do a few donuts right after i get done going around a few times it gives me the same error "service active handling".
Even though it was off during the donuts. But when i turn off the car and turn it back on everything is fine
Even though it was off during the donuts. But when i turn off the car and turn it back on everything is fine
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Here is the info that you need to figure out what DTC's are being set:
This is the absolute best C5 Code web sites!!!
http://www.corvettedoctor.com/Code_Main.html
www.corvettedoctor.com
http://www.corvettedoctor.com/index.html
Here is another very good site:
http://www.obd-codes.com/trouble_cod...d-ii-codes.php
If it happens only after a shock event, you most likely have a bad connection somewhere in the harness/s. The front wheel sensors have a sh!& load of female connections that can go bad. The female pin fails and looses connection. I have a picture of a good and bad connector:
This is the jumper harness that has a tendency to go bad:
Here is the connector:
The connector on the LEFT is new. The one on the right is BAD!!!!
Post your codes and we can narrow it down to which wheel or component.
Bill Curlee
This is the absolute best C5 Code web sites!!!
http://www.corvettedoctor.com/Code_Main.html
www.corvettedoctor.com
http://www.corvettedoctor.com/index.html
Here is another very good site:
http://www.obd-codes.com/trouble_cod...d-ii-codes.php
If it happens only after a shock event, you most likely have a bad connection somewhere in the harness/s. The front wheel sensors have a sh!& load of female connections that can go bad. The female pin fails and looses connection. I have a picture of a good and bad connector:
This is the jumper harness that has a tendency to go bad:
Here is the connector:
The connector on the LEFT is new. The one on the right is BAD!!!!
Post your codes and we can narrow it down to which wheel or component.
Bill Curlee
Racer
Joined: Oct 2006
Posts: 465
Likes: 0
From: Atlanta, GA
Bill, do you have a picture/instructions where we can find that jumper on the car? I think I have a similar problem? Does anyone have the GM part # so I could order a new one, seems like it would be pretty cheap.
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
The jumper is EASY to locate. Just look on the back of the front wheel hub and you will see that it has a wire and a connector:
Front wheel hub with wire:
Rear wheel hub with wire:
On the FRONT HUBS the hub sensor connects to the jumper cable:
The jumper goes from the hub to the main harness connector on the fraim. Just follow it back and you will see that it is easy to find.
Happy Thanksgiving!!
BC
Front wheel hub with wire:
Rear wheel hub with wire:
On the FRONT HUBS the hub sensor connects to the jumper cable:
The jumper goes from the hub to the main harness connector on the fraim. Just follow it back and you will see that it is easy to find.
Happy Thanksgiving!!
BC
Drifting
Joined: May 2000
Posts: 1,917
Likes: 3
From: Southern NH
Your DIC codes will confirm where the problem is, but I agree with Bill that your issue is likely with an intermittent connector contact.
I had a one time issue with this ABS/TCS warnings and my DIC code was a LF wheel excessive wheel speed as I as slowly oulling out of a parking space.
I pulled the connectors for the LF wheel, checked all the wires and contacts, and added some dielectric grease. The problem hasn't come back.
I had a one time issue with this ABS/TCS warnings and my DIC code was a LF wheel excessive wheel speed as I as slowly oulling out of a parking space.
I pulled the connectors for the LF wheel, checked all the wires and contacts, and added some dielectric grease. The problem hasn't come back.
Racer
Joined: Mar 2006
Posts: 381
Likes: 3
I'm suddenly getting the same two warnings. My battery was completely dead (I mean as if the battery had been removed) after I charged the battery back up, then started the car, the warnings appeared. Never had them before.