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• | 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 speeds are detected by active wheel speed sensors. Each wheel speed sensor receives a 12 V reference voltage from the electronic brake control module (EBCM) and provides an alternating current square wave signal to the EBCM. As the wheel spins, the EBCM uses the frequency of the square wave signal to calculate the wheel speed. The EBCM sends the wheel speed information as a serial data message. Modules connected to the high speed CAN circuit monitor for the vehicle speed information.
System voltage is between 9-16 V.
A supervised periodic message that includes the wheel speed serial data has not been received.
The electronic suspension control is disabled for the duration of the ignition cycle.
A current DTC clears when the diagnostic runs and passes.
Antilock Brake System Schematics
Control Module References for scan tool information
Ignition ON, observe the scan tool EBCM Wheel Speed Sensor parameters. The reading should be the same speed on all sensors when driving in a straight line at a speed greater than 20 km/h (13 MPH).
If any listed DTC are set
If none of the listed DTCs is set
If the DTC resets
Replace the K17 Electronic Brake Control Module.
If the DTC does not reset
Perform the Diagnostic Repair Verification after completing the repair.
Control Module References for control module replacement, programming and setup
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