Pinpoint Test M: Front Wheel Speed Sensor Electrical Faults: Notes
Refer to VEHICLE DYNAMIC SYSTEMS for schematic and connector information.
Normal Operation and Fault Conditions
Active wheel speed sensors generate a voltage 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. The 2 circuits provide both sensor power and sensor signal return.
REFER to: Anti-Lock Brake System (ABS) and Stability Control - System Operation and Component Description .
DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Condition |
|---|---|---|
| ABS C0031:01 | Left Front Wheel Speed Sensor: General Electrical Failure | Sets when the ABS module does not receive a signal from the wheel speed sensor. |
| ABS C0034:01 | Right Front Wheel Speed Sensor: General Electrical Failure | Sets when the ABS module does not receive a signal from the wheel speed sensor. |
| ABS C1A95:01 | Wheel Speed Sensor: General Electrical Failure | Sets when the ABS module detects the following conditions on 1 or more wheel speed sensor circuits; open circuit, short to voltage, short to ground. Faults with multiple wheel speed sensors also causes this DTC to set. |
Possible Sources
- Wiring, terminals or connectors
- Wheel speed sensor
- ABS module
Visual Inspection and 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.