Normal Operation
WARNING: This page is about a different car, the 2011 Mercury Milan, 2011 Lincoln MKZ, and 2011 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
The wheel speed sensor and sensor ring generate a square wave signal to the ABS module that is proportional to the wheel speed. The ABS module compares the wheel speed inputs from all the wheel speed sensors to determine an impending wheel lockup.
DTC DESCRIPTION TABLE
| DTC Description | Fault Trigger Condition |
|---|---|
|
If the ABS module does not receive a signal from a wheel speed sensor when the vehicle speed is greater than 15 km/h (9 mph), the appropriate DTC is set. If the difference of 2 wheel speed values is greater than 25 km/h (16 mph), the appropriate DTC sets. These DTCs are usually set by a damaged wheel speed sensor or damaged sensor tone ring, they can also be set by wheels and/or tires of different sizes being installed on the vehicle or a difference in tire pressures. |
This pinpoint test is intended to diagnose the following:
- Mismatched tire sizes
- Wheel speed sensor ring (part of the wheel bearing and hub assembly)
- Wheel speed sensor
- ABS module