Tips on how to Troubleshoot a Grand Prix ABS Light and Traction Manage Light 1Check the tires for proper wheel size and check the fluid level in master cylinder. Improper tire size, including two various sizes, will lead to the wheels to turn at unique speeds and may well set a false code when the computer senses this as potential wheel lock-up. Low fluid level inside the brake master cylinder will lead to shutdown from the ABS and Traction Manage technique to prevent introduction of air in to the brake program.2Turn the ignition essential off and insert the scan tool's connector in to the vehicle's diagnostic connector.
The diagnostic connector in OBD-II equipped Grand Prix is situated below the driver's side of the dash near the steering column. Turn the ignition essential on and retrieve trouble codes according to the directions supplied with all the scan tool. In most circumstances you may pick "Read Codes" from the onscreen menu or push the "Read" button on the front of the scan tool to retrieve codes. Go to step two in the event the code indicates a wheel speed sensor fault or step 5 if the codes indicates a solenoid fault.3Select "Data" from the onscreen menu and scroll by means of the list until wheel speed sensor information is displayed on the screen car diagnostic software. Test drive the car or truck while monitoring the wheel speed signals, indicated by the fault code, on the scan tool. In the event the wheel speed signal is different from the remaining wheel speed signals, test the resistance of the sensor.
4Unplug the faulty wheel speed sensor, situated on the back on the wheel bearing and hub assembly at every wheel in the Grand Prix and test the resistance from the sensor using your digital volt/ohm meter set to study resistance. The resistance of a fantastic wheel speed sensor will be1k ohms +/- ten percent. Replace the sensor if the meter shows 0 ohms, infinite ohms, or the resistance will not be 1k ohms +/- ten percent.5Check fuses inside the fuse block below the dash and under the hood. The fuses for the ABS and Traction Manage systems are marked on the body of the fuse blocks. Replace any faulty fuses prior to continuing with all the tests. Unplug the modulator valve assembly positioned on the driver's side with the passenger compartment near the master cylinder and test the resistance of solenoids using you digital volt/ohm meter. Replace the modulator valve assembly if 0 ohms or infinite resistance are measured at the assembly automotive diagnostic tool.
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