Normal Operation
WARNING: This page is about a different car, the 2012 Ford Pickup. However, it is still accessible from the selected car via links, so may be relevant.
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. The front wheel bearings contain a magnetic strip that replaces the tone ring. It functions the same but is not visible for inspection.
Battery voltage and ground are supplied to the active wheel speed sensors from the ABS module.
| DTC Description | Fault Trigger Condition |
|---|---|
|
These DTCs set in continuous memory if the ABS module detects an open, short to ground or voltage or a damaged wheel speed sensor input circuit, the appropriate DTC sets when the vehicle speed exceeds 6 km/h (4 mph). DTCs set in the ignition cycle can only be cleared by cycling the ignition off and on once the fault has been corrected. DTCs C1165 and C1175 also set on-demand. |
This pinpoint test is intended to diagnose the following:
- Wheel speed sensors
- Wheel bearing magnetic strips, rear tone rings
- Wiring, terminals or connectors
- ABS module