Test B: DTCs C1145, C1155 and C1230 - Wheel Speed Sensor Circuit Failure

Pinpoint Test B: DTCs C1145, C1155 and C1230 - Wheel Speed Sensor Circuit Failure
Refer to Vehicle/Diagrams, Vehicle Dynamic Systems for schematic and connector information.

Normal Operation
The wheel speed sensor and the wheel speed sensor ring generate a signal that is sent to the ABS module. The wheel speed sensor circuitry connects to ABS module C135 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.
^ DTC C1145 RF Wheel Speed Sensor Input Circuit Failure - When the vehicle speed exceeds 5 km/h (3 mph), if the ABS module detects an open, short to ground or voltage or a defective wheel speed sensor input circuit, DTC C1145 will be set.
^ DTC C1155 LF Wheel Speed Sensor Input Circuit Failure - When the vehicle speed exceeds 5 km/h (3 mph), if the ABS module detects an open, short to ground or voltage or a defective wheel speed sensor input circuit, DTC C1155 will be set.
^ DTC C1230 Rear Wheel Speed Sensor Input Circuit Failure - When the vehicle speed exceeds 5 km/h (3 mph), if the ABS module detects an open, short to ground or voltage or a defective wheel speed sensor input circuit, DTC C1230 will be set.

This pinpoint test is intended to diagnose the following:
^ Wiring, terminals or connectors
^ Wheel speed sensor
^ ABS module

B1:

B1 (Continued)-B3:

B4-B6: