2002 Pontiac Aztek ABS problems

MOEMAN101

MEMBER
2002 PONTIAC AZTEK

Brakes problem
2002 Pontiac Aztek 6 cyl All Wheel Drive Automatic

I have a 2002 pontiac aztek that every time I put it in gear the abs light comes on when I got it hooked up to a computer it pulls up the right rear abs sensor I have changed it 3 times a new one every time and the problem still consists I checked the wires all the way to the module wiggled the conections nothing happened till I put it in gear can you give me an other ideas what else it could be? I have asked mechanics if it could be the module they dont realy think it is Im out of ideas

1 Reply

CARADIODOC

MECHANIC
33,873 POSTS

Hi moeman101. Welcome to the forum. When you checked the wires, did you measure continuity or just do a visual inspection? A continuity test from the computer will tell you if the circuit has a problem. Compare it to the readings for the other sensors. Here are some things to be aware of. Some aftermarket scanners have a glitch that causes them to read a code for the wrong wheel. I want to say it's between the right rear and right front, but I can't remember for certain. GM has been having a ton of trouble with abs sensors built into the wheel bearing assembly. The bearings develop a little slop, (nothing out of the ordinary), but it causes the signals to drop out. If you have the style with a separate sensor, look at the tone ring to see if it is cracked. That will set a diagnostic fault code and turn on the warning light AFTER the vehicle is moving. A sensor electrical problem will show up right away after the engine is started.

Be sure all four tires are the same circumference. If you have access to a scanner that will read the four wheel speeds while you're driving, use that to see what's happening to the readings.

Caradiodoc