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Test I: Check For Correct Anti-Lock Brake System (ABS) Module Operation

Pinpoint Test I: Check For Correct Anti-Lock Brake System (ABS) Module Operation

Normal Operation
The wheel speed sensor and the wheel speed sensor ring generate a signal that is sent to the ABS module. The wheel speed sensor circuitry connects to the ABS module connector C135 through 2 wires and a connector at each wheel speed sensor. When the ignition is turned to the RUN position, the ABS module carries out a self-test by sending a reference voltage through the wheel speed sensors and their circuitry to determine if they are functional.

Possible Causes
^ Wheel speed sensor ring
^ Wheel speed sensor
^ ABS module

I1:




I2-I3: