• | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
• | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
• | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
As the wheel spins, the wheel speed sensor produces an AC signal. The electronic brake control module (EBCM) uses the frequency of the AC signal to calculate the wheel speed.
• | The ignition is ON. |
• | Ignition voltage is greater than 8 volts. |
• | Vehicle must be moving at a speed less than 14.5 km/h (9 mph). |
• | No wheel speed sensor faults exist. |
• | Brake is not applied. |
• | Vehicle is not cornering. |
• | No wheel spinning is detected. |
Wheel speed differences between one wheel and the others is greater than 25 percent.
• | Antilock Brake System (ABS), Traction Control System (TCS) and Vehicle Stability Enhancement System (VSES) are inhibited. |
• | The ABS indicator turns ON. |
• | The condition for the DTC is no longer present. |
• | The condition for the DTC is no longer present and the DTC is cleared with a scan tool. |
• | Faulty wheel speed sensor will not set this DTC. |
• | A vehicle using a space saver spare will not set this code. |
Inspect for one tire that has improper air pressure or improper size.
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.