Normal Operation and Fault Conditions
Active wheel speed sensors generate a square wave signal proportional to wheel speed which is sent to the ABS module. Each wheel speed sensor is connected to the ABS module through 2 wires and a connector at each wheel speed sensor. One wire is for sensor voltage supply from the ABS module and the other wire is for the signal return to the ABS module. When the ignition mode 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.
Vehicles equipped with active park assist use bi-directional wheel speed sensors. If the vehicle is equipped with active park assist, the Rotunda Active Wheel Speed Sensor tester cannot be used to diagnose the wheel speed sensors.
PPT M ABS MODULE DTC FAULT TRIGGER CONDITIONS
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| C0031:11 | Left Front Wheel Speed Sensor: Circuit Short to Ground | Sets when the ABS module detects a short to ground in the sensor signal return circuit or if the sensor has an internal short to ground. |
| C0034:11 | Right Front Wheel Speed Sensor: Circuit Short to Ground | Sets when the ABS module detects a short to ground in the sensor signal return circuit or if the sensor has an internal short to ground. |
| C0031:15 | Left Front Wheel Speed Sensor: Circuit Short to Battery or Open | Sets when the ABS module detects a short to battery voltage or an open in the sensor signal return circuit. A short to battery voltage may be due to the sensor signal return circuit and the sensor voltage supply circuit shorted together. These DTCs also set if the sensor has an internal short to battery voltage or an open circuit. |
| C0034:15 | Right Front Wheel Speed Sensor: Circuit Short to Battery or Open | Sets when the ABS module detects a short to battery voltage or an open in the sensor signal return circuit. A short to battery voltage may be due to the sensor signal return circuit and the sensor voltage supply circuit shorted together. These DTCs also set if the sensor has an internal short to battery voltage or an open circuit. |