Diagnostic Aids

Thoroughly inspect the wiring and the connectors. An incomplete inspection of the wiring and the connectors may result in a misdiagnosis, causing a part replacement with the reappearance of the malfunction.

The following are possible causes of the malfunction:

• A short to ground or a short to voltage in the wheel speed sensor circuitry
• An open or high resistance in the wheel speed sensor circuitry
• A malfunctioning wheel speed sensor
• A malfunctioning wheel speed sensor rotor
• An internal EBCM malfunction

If an intermittent malfunction exists, refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.