C0035

DTC C0035-C0050








Circuit Description
As the wheel spins, the wheel speed sensor produces an alternating current (AC) signal. The electronic brake control module (EBCM) uses the frequency of the AC signal to calculate the wheel speed.

DTC Descriptors
This diagnostic procedure supports the following DTCs:
^ DTC C0035 LF Wheel Speed Sensor Circuit
^ DTC C0040 RF Wheel Speed Sensor Circuit
^ DTC C0045 LR Wheel Speed Sensor Circuit
^ DTC C0050 RR Wheel Speed Sensor Circuit

Conditions for Running the DTC
The ignition is in the ON position.

Conditions for Setting the DTC
The EBCM detects a short to voltage, open circuit or erratic signal fault condition in the wheel speed sensor signal circuit and/or wheel speed low reference circuit.

Action Taken When the DTC Sets
The following actions occur:
^ The EBCM disables the antilock brake and traction control systems for the duration of the ignition cycle.
^ The ABS, TRAC OFF and BRAKE warning indicators turn ON.

Conditions for Clearing the DTC
The condition responsible for setting the DTC no longer exists and the scan tool Clear DTCs function is used.

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 ring
^ An internal EBCM malfunction

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

Test Description
The number below refers to the step number on the diagnostic table.
7. This step tests the wheel speed sensor circuits for a short, open or high resistance.