Left Front Wheel Speed Signal Failure

Symptom:
LEFT FRONT WHEEL SPEED SIGNAL FAILURE

When Monitored and Set Condition:
LEFT FRONT WHEEL SPEED SIGNAL FAILURE

When Monitored: Wheel speed comparison is checked at drive offer every 7 milliseconds (ms). Sensor signal continuity is checked every 7 milliseconds. Wheel speed phase length supervision is checked every 7 milliseconds.

Set Condition: If, during an ABS stop, the CAB commands any valve solenoid on for an extended length of time, and does not see a corresponding wheel speed change, the Diagnostic Trouble Code (DTC) is set. The DTC can also set if the signal is missing or erratic.

Possible Causes
SENSOR OR TONE WHEEL CONCERN
DTC INTERMITTENT
LEFT FRONT WHEEL SPEED SENSOR INOPERATIVE
INTERMITTENT SIGNAL DTC