Normal Operation
WARNING: This page is about a different car, the 2009 Mercury Milan, 2009 Lincoln MKZ, and 2009 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
Active wheel speed sensors generate a square wave 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.
Voltage and ground signals are supplied to the 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:
- Wiring, terminals or connectors
- Wheel speed sensor ring (part of the wheel bearing and hub assembly)
- Wheel speed sensors
- ABS module