Normal Operation
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.
DTC DESCRIPTION
| DTC Description | Fault Trigger Condition |
|---|---|
|
These DTCs set if any of the wheel speed sensor's signal current is below 4.5 mA or above 20 mA for longer than 140 milliseconds, or if either sensor circuit is shorted to ground or battery voltage. |
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Wheel speed sensors
- ABS module