Test C: DTCS C1145, C1155, C1165 and C1175 - Wheel Speed Sensor Input Circuit Failure

Test C: DTCs C1145, C1155, C1165 and C1175 - Wheel Speed Sensor Input Circuit Failure

Refer to Vehicle/Diagrams, Vehicle Dynamic Systems for schematic and connector information.

Normal Operation
The active wheel speed sensors generate a square wave signal that is sent to the anti-lock brake system (ABS) module. The wheel speed sensor circuitry connects to the ABS module through 2 wires and a connector at each wheel speed sensor. When the ignition is turned to the run position, the ABS module carries out a self-test by sending a reference voltage to all of the wheel speed sensors and their circuitry to determine if they are functional.

Voltage and ground signals are supplied to the wheel speed sensors from the ABS module.

Possible Causes
- Circuit open
- Circuit shorted
- Wheel speed sensor
- Anti-lock brake system (ABS) module

C1-C3:

C3-C5:

C5-C6: