The anti-lock braking mechanism (ABS) and Traction control systems in your grand Prix both usage the ABS wheel-speed sensors and modulator valve assembly to manage wheel slip. The ABS mechanism monitors the wheel-speed sensors and also relieves brake push on a wheel that it senses is nearing lock-up. The Traction regulate system monitors the exact same wheel-speed sensor and also applies brake push to any kind of wheel it senses over accelerating. Diagnosis that these solution is accomplished using a scan tool and the car"s on-board computer system diagnostics function.

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Check the tires for appropriate wheel size and also check the liquid level in understand cylinder. Improper tires size, such together two different sizes, will cause the wheels to revolve at different speeds and may collection a false code once the computer system senses this together potential wheel lock-up. Low liquid level in the brake master cylinder will result in shutdown of the ABS and Traction manage system to prevent advent of air into the brake system.


Turn the ignition key off and also insert the scan tool"s connector into the vehicle"s diagnostic connector. The diagnostic connector in OBD-II equipped cool Prix is situated under the driver"s side of the dash near the steering column. Revolve the ignition an essential on and also retrieve trouble codes follow to the instructions gave with the scan tool. In most situations you will choose "Read Codes" native the onscreen menu or press the "Read" switch on the former of the scan device to retrieve codes. Go to step two if the code shows a wheel rate sensor fault or step 5 if the codes suggests a solenoid fault.


Select "Data" from the onscreen menu and scroll through the list until wheel rate sensor data is shown on the screen. Test drive the vehicle while monitoring the wheel speed signals, indicated by the error code, top top the scan tool. If the wheel speed signal is various from the remaining wheel rate signals, check the resistance the the sensor.


Unplug the faulty wheel speed sensor, located on the earlier of the wheel bearing and also hub assembly at each wheel in the cool Prix and test the resistance the the sensor utilizing your digital volt/ohm meter collection to read resistance. The resistance the a good wheel speed sensor will be1k ohms +/- 10 percent. Replace the sensor if the meter reflects 0 ohms, boundless ohms, or the resistance is not 1k ohms +/- 10 percent.

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Check fuses in the fuse block under the dash and under the hood. The fuses for the ABS and Traction manage systems are significant on the body of the fuse blocks. Replace any faulty fuses prior to continuing v the tests. Unplug the modulator valve assembly located on the driver"s next of the passenger compartment near the grasp cylinder and test the resistance that solenoids using you digital volt/ohm meter. Change the modulator valve assembly if 0 ohms or boundless resistance space measured at the assembly.