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.
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.
Both voltage and ground are supplied to the active wheel speed sensors from the ABS module.
DTC DESCRIPTION TABLE
| DTC Description | Fault Trigger Conditions |
|---|---|
|
If the left front wheel speed sensor signal current is below 45 mA or above 20 mA for longer than 140 milliseconds, this DTC sets. |
|
If the right front wheel speed sensor signal current is below 45 mA or above 20 mA for longer than 140 milliseconds, this DTC sets. |
|
If the left rear wheel speed sensor signal current is below 45 mA or above 20 mA for longer than 140 milliseconds, this DTC sets. |
|
If the right rear wheel speed sensor signal current is below 45 mA or above 20 mA for longer than 140 milliseconds, this DTC sets. |
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Wheel speed sensor
- ABS module