• | 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. |
The wheel speed sensor receives ignition voltage from the electronic brake control module (EBCM) and provides an output signal to the EBCM. As the wheel spins, the wheel speed sensor sends the EBCM a DC square wave signal, and uses the frequency of the square wave signal to calculate the wheel speed.
• | Ignition voltage is greater than 9.5 volts. |
• | No wheel speed sensor faults exist. |
• | Brake is not applied. |
• | Vehicle is not cornering. |
Wheel speed differences between one wheel and the others is greater than 25 percent.
• | The EBCM disables the traction control system (TCS) and vehicle stability enhancement system (VSES) for the duration of the ignition cycle. |
• | The ABS indicator illuminates. |
• | The StabiliTrak indicator illuminates. |
• | The driver information center (DIC) displays all wheel drive (AWD) OFF/Service Traction Control/Service StabiliTrak message. |
• | The DTC becomes history when the conditions for setting the DTC are no longer present. |
• | The history DTC clears after 100 malfunction-free ignition cycles. |
• | Faulty wheel speed sensor will not set this DTC. |
• | A vehicle using a space saver spare will not set this code. |
Antilock Brake System Schematics
Control Module References for scan tool information
Inspect for one tire that has improper air pressure or improper size.