Normal Operation
WARNING: This page is about a different car, the 2008 Ford RV Cutaway, 2008 Ford Econoline, 2008 Ford E450 Super Duty, and 2008 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
The wheel speed sensors are "active" sensors and generate a square wave signal that is sent to the ABS module. When the ignition is turned to the RUN position, the ABS module carries out a self-test to determine if the sensors are functional. Voltage and ground are supplied to the front wheel speed sensors from the ABS module along a pair of wires.
Wheel speed sensor DTCs will automatically clear when a successful test drive is carried out. A successful test drive should include speeds above 32 km/h (20 mph) and at least one ABS stop.
| DTC Description | Fault Trigger Condition |
|---|---|
|
If during the ABS module on-demand self test or during normal operation, 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. These DTCs are usually set by a damaged sensor or a circuit fault. |
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Wheel speed sensor ring
- Wheel speed sensor
- ABS module