ABS and Trac lights set after bumpy highway
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Joined: Feb 2016
Posts: 86
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From: Tualatin, OR
ABS and Trac lights set after bumpy highway
Just got back from a ~40 mile drive and when I went a small bump in the highway it set the ABS and traction control lights on the dash and the DIC said service soon. I also noticed when I went over subsequent bumps the check engine light would flash for a half second and it would feel like the car stuttered. I pulled codes from DIC before shutting the car off and there are as follows:
B2252 H
U1064 H
C1248 H C
C1254 H C
U1040 H C
Any ideas of where to start? Car is a 2003 Z06 w/ ~61k miles. Any help is appreciated. Thanks!
B2252 H
U1064 H
C1248 H C
C1254 H C
U1040 H C
Any ideas of where to start? Car is a 2003 Z06 w/ ~61k miles. Any help is appreciated. Thanks!
Thread Starter
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Joined: Feb 2016
Posts: 86
Likes: 9
From: Tualatin, OR
C1248 is set because of code C1254.
C1254 is a failure of the Keep Alive Memory in the EBCM.
Most likely cause is a loss of ground or battery connection or an internal malfunction of the EBCM.
I'd start with checking all battery connections including the one at the starter. Insure all are clean and tight. Also check all grounds related to the EBCM. Here are a couple links related to grounds for the C5:
http://forums.corvetteforum.com/c5-t...locations.html
http://forums.corvetteforum.com/c5-t...tion-long.html Post #1
This might also be an ignition switch related issue. Do you have a lot of "stuff" hanging on the key chain? The ignition switch provides power to the EBCM and this could be interrupted if the contact surfaces in the ignition switch loose contact on a bumpy road.
C1254 is a failure of the Keep Alive Memory in the EBCM.
Most likely cause is a loss of ground or battery connection or an internal malfunction of the EBCM.
I'd start with checking all battery connections including the one at the starter. Insure all are clean and tight. Also check all grounds related to the EBCM. Here are a couple links related to grounds for the C5:
http://forums.corvetteforum.com/c5-t...locations.html
http://forums.corvetteforum.com/c5-t...tion-long.html Post #1
This might also be an ignition switch related issue. Do you have a lot of "stuff" hanging on the key chain? The ignition switch provides power to the EBCM and this could be interrupted if the contact surfaces in the ignition switch loose contact on a bumpy road.
Thread Starter
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Joined: Feb 2016
Posts: 86
Likes: 9
From: Tualatin, OR
I used Bill Curlee's guide here:
https://www.corvetteforum.com/forums...ch-repair.html
Took the ignition switch apart and there were three contacts that were pretty badly blackened. If you're chasing the same problem I also found a loose connection at the two positive wires that go to the under hood fuse box so the ignition switch may have been only half the problem.
https://www.corvetteforum.com/forums...ch-repair.html
Took the ignition switch apart and there were three contacts that were pretty badly blackened. If you're chasing the same problem I also found a loose connection at the two positive wires that go to the under hood fuse box so the ignition switch may have been only half the problem.
