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

Pinpoint Test B: DTCs C1145, C1155, C1165 and C1175 - Wheel Speed Sensor Input Circuit Failure
Refer to Vehicle Dynamic Systems for schematic and connector information.

Normal Operation
Active wheel speed sensors generate a square wave current signal that is sent to the 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 switch is turned to the RUN position, the ABS module carries out a self-test by sending a reference voltage through the wheel speed sensors and their circuitry to determine if they are functional.

Battery voltage and ground are supplied to the active wheel speed sensors from the ABS module.





This pinpoint test is intended to diagnose the following:
^ Wheel speed sensor ring (part of the hub and bearing assembly)
^ Wheel speed sensors
^ Wiring, terminals or connectors
^ ABS module

B1-B4:

B4-B6:

B6-B10: