For 1990-2009 cars only
Diagnostic Instructions
| • | 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. |
DTC Descriptor
DTC C0245: Wheel Speed Sensor Frequency ErrorCircuit/System Description
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.
Conditions for Running the DTC
| • | 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 (vehicle is traveling in a straight path). |
| • | No wheel spinning is detected (traction control is not active). |
Conditions for Setting the DTC
Wheel speed differences between one wheel and the others is greater than 25 percent.
Action Taken When the DTC Sets
| • | Antilock Brake System (ABS) is inhibited. |
| • | Traction Control System (TCS) is inhibited. |
| • | The ABS indicator turns ON. |
| • | The EBCM disables traction control system (TCS) |
Conditions for Clearing the MIL/DTC
| • | 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. |
Diagnostic Aids
| • | Faulty wheel speed sensor will not set this DTC. |
| • | A vehicle using a space saver spare will not set this code. |
Reference Information
Schematic Reference
Antilock Brake System Schematics
Connector End View Reference
Description and Operation
Electrical Information Reference
Scan Tool Reference
Circuit/System Verification
Inspect for one tire that has improper air pressure or improper size.
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
