Question about Cars & Trucks
Hi Fred, The ABS (Anti Brake System) and the traction control receive signals from the same sensors. These sensors pick up signals from rotors located located on the inside and rotating part of the wheel. They look similar to gears but in fact are small generators. As the segments pass the pick up sensor, a small voltage is generated and transmitted to the management computer system. The slower the rotation the less the voltage and if the wheel locks the signal disappears, which in turn will be computed as a lock up and the system will then release that particular wheel. A locked wheel will loose traction over the road surface and consequently the car skids, the driver looses control. The traction control works from the same sensors and measures any slippage, computing the difference between the rotation of each wheel. If the difference shows signs of exceeding the tolerances recorded in the computer, the brake for that wheel is momentarily applied, thereby slowing the rotation to stop spin so that traction is maintained with the road surface. The fault you're reporting allows for the vehicle to be driven but without the safety systems mentioned. It is probable that the defect is a defective pick up sensor, but it can be a number of other units within the ABS system causing the problem. Take the vehicle and have a diagnostic scan carried out. That will pin point where the problem is so that it can be repaired. Regards John
Posted on Feb 17, 2012
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Posted on Jan 02, 2017
It sounds like you have a faulty ABCM or anti-lock braking control mechanism. 2003 was a common year for failure of this. Usually your car will drive just fine, however, your ABS and traction control might not work as well as there supposed too in a collision.
Posted on May 28, 2009
The ABS (antilock brake sytem) and the "track" are interconnected. Your ABS system has generated an error code and is not working and therefore your traction control system is disabled also. In most cases it is a failed abs speed sensor located in 2 or all 4 wheels that is creating the problem. The codes and locations can be read with a scanner. Worse case scenario is your abs booster pump has failed and would need replacing if you want the ABS function to work. You can also try disconnecting the electrical cord in the front/bottom of the ABS pump and spray the connectors with an electrical parts cleaner aerosol and reconnecting. This worked for my 2002 Impala LS, just had a bad connection from one of the sensors from all the years. Your brakes are still working just no anti-lock feature.
Posted on Jun 04, 2011
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