D: C1145, C1155, C1165, C1175 - Wheel Speed Sensor Input Circuit Failure
Pinpoint Test D: DTC C1145, DTC C1155, DTC C1165, DTC C1175-Wheel Speed Sensor Input Circuit FailureTest D1:
Test D1-D3:
Test D3 Continued:
Test D4-D5:
Test D5-D6:
CAUTION: Use the flex probe kit for all test connections to prevent damage to the wiring terminals Do not use standard multimeter probes.
Normal Operation
The active wheel speed sensor generates a square wave signal that is sent to the ABS module. The wheel speed sensor circuitry connects to the ABS module connector C155 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 through the wheel speed sensors and their circuitry to determine if they are functional.
Power and ground are supplied to the active wheel speed sensors from the ABS module.
Possible Causes
^ circuit 514 (YE/RD) open, short to power, or short to ground
^ circuit 516 (YE/BK) open, short to power, or short to ground
^ circuit 518 (LG/RD) open, short to power, or short to ground
^ circuit 519 (LG/BK) open, short to power, or short to ground
^ circuit 521 (TN/OG) open, short to power, or short to ground
^ circuit 522 (TN/BK) open, short to power, or short to ground
^ circuit 523 (RD/PK) open, short to power, or short to ground
^ circuit 524 (PK/BK) open, short to power, or short to ground
^ wheel speed sensor
^ ABS module