Diagnosing ABS Problem
09-21-2013, 01:32 PM
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Diagnosing ABS Problem I've got a 2001 Suburban 1500 4WD with 225K miles on it.
Recently the ABS system has started kicking in on low speed stops and it happens on dry roads. No codes and no indicator lights lighting up.
I took it to a Chevy dealer who scanned the system and the only thing that they found was a faulty brake switch. They replaced it, but it didn't fix the problem. The service manager suggested replacing the wheel speed sensor on the front wheels, and I just finished with that replacement.
The ABS system still kicks in on slow stops.
What do I check next? Could a sticking caliper cause the system to come on?
Thanks.
Recently the ABS system has started kicking in on low speed stops and it happens on dry roads. No codes and no indicator lights lighting up.
I took it to a Chevy dealer who scanned the system and the only thing that they found was a faulty brake switch. They replaced it, but it didn't fix the problem. The service manager suggested replacing the wheel speed sensor on the front wheels, and I just finished with that replacement.
The ABS system still kicks in on slow stops.
What do I check next? Could a sticking caliper cause the system to come on?
Thanks.
09-21-2013, 04:19 PM
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Just went through this. It's gong to be a long road but start here.
https://ls1tech.com/forums/ls4-perfo...rak-light.html
https://ls1tech.com/forums/ls4-perfo...rak-light.html
09-22-2013, 07:44 PM
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I went back and pulled everything back apart ... took the front wheel speed sensors out. Believing that it was a ground issue, I used a Dremel tool to clean the mounting pads alot better than I had the first time around. Put everything back together and it seems to have fixed the issue. I did notice that the original driver's side speed sensor had three thin gaskets sandwiched between the sensor and the hub, while the original passenger side sensor didn't have any gaskets at all. So far, so good.
