PINPOINT TEST AK : Wheel Speed Sensor Electrical Faults - Rear: Notes
Diagnostic Overview
Wheel Speed Sensor Electrical Faults - Rear
Refer to Vehicle Dynamic Systems for schematic and connector information.
Normal Operation and Fault Conditions
REFER to Anti-Lock Brake System (ABS) and Stability Control , Wheel Speed Sensor.
When the ignition is set to ON, the ABS module carries out a self-test by sending a reference voltage through the wheel speed sensors and their circuitry.
DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| C0037:01 | Left Rear Wheel Speed Sensor: General Electrical Failure | These DTCs set in continuous memory and on-demand if any wheel speed sensor signal current is below 4.5 mA or above 20 mA for longer than 140 milliseconds, or if either sensor circuit is shorted to ground or battery voltage. |
| C0037:19 | Left Rear Wheel Speed Sensor: Circuit Current Above Threshold | |
| C003A:01 | Right Rear Wheel Speed Sensor: General Electrical Failure | |
| C003A:19 | Right Rear Wheel Speed Sensor: Circuit Current Above Threshold | |
| C0037:95 | Left Rear Wheel Speed Sensor: Incorrect Assembly | These DTCs set in continuous memory and on-demand if there is an internal failure of the wheel speed sensor or if either sensor circuit is shorted to ground, shorted to battery voltage or if either circuit is open. Vehicles equipped with active park assist use bi-directional wheel speed sensors in the rear positions, vehicles not equipped with active park assist use standard, active wheel speed sensors in the rear positions. These DTCs also set in continuous memory and on-demand if the wrong style of wheel speed sensor is installed on the vehicle. |
| C003A:95 | Right Rear Wheel Speed Sensor: Incorrect Assembly |
Visual Inspection and Diagnostic Pre-checks
- Make sure the wheel speed sensor harness is routed correctly and is undamaged.
- Make sure the wheel speed sensor electrical connector is free from any corrosion or other contaminants.