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.
Both voltage and ground are supplied to the active wheel speed sensors from the ABS module.
DTC DESCRIPTION
| 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