Normal Operation
Active wheel speed sensors generate a square wave current signal that is sent to the ABS module. The wheel speed sensor circuitry connects to the ABS module through 2 wires and a connector at each wheel speed sensor. When the ignition switch 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.
Battery voltage and ground are supplied to the active wheel speed sensors from the ABS module.
| DTC Description | Fault Trigger Condition |
|---|---|
|
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, the appropriate DTC will be set. |
This pinpoint test is intended to diagnose the following:
- Wheel speed sensor ring (part of the hub and bearing assembly)
- Wheel speed sensors
- Wiring, terminals or connectors
- ABS module