C0245

DTC C0245
DTC Descriptor
DTC C0245
Wheel Speed Sensor Frequency Error

Diagnostic Fault Information

Important: Always perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Diagnostic System Check - Vehicle

Circuit/System Description
The wheel speed sensor receives a 12-volt reference voltage from the electronic brake control module (EBCM). As the wheel spins, the wheel speed sensor sends the EBCM a DC square wave signal via the wheel speed sensor output circuit. The EBCM uses the frequency of the square wave signal to calculate the wheel speed.

Conditions for Running the DTC
^ Ignition voltage is greater than 8 volts.
^ Vehicle must be moving at a speed greater than 30 km/h.

Conditions for Setting the DTC
^ The difference between 2 wheel speeds exceeds 20 percent.
^ The fault must be present for greater than 60 seconds.

Action Taken When the DTC Sets
^ The EBCM disables the Antilock Brake System (ABS)/Traction Control System (TCS)/Vehicle Stability Enhancement System (VSES) for the duration of the ignition cycle.
^ The ABS indicator turns ON.
^ The driver information center (DIC) displays the ABS FAULT message.
^ The Stability Caution indicator turns on.
^ The DIC displays the SERVICE STAB SYS message.
^ The DIC displays the TRACTION FAILED message.

Conditions for Clearing the DTC
^ The condition for the DTC is no longer present and the DTC is cleared with a scan tool.
^ The EBCM automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.

Diagnostic Aids
Inspect tires for improper air pressure or improper size.