Left Front Sensor Signal Failure

Tests 41 Through 46:

Tests 47 Through 49:

Symptom
LEFT FRONT SENSOR SIGNAL FAILURE

When Monitored
The CAB monitors the wheel speed sensor signal at all times.
1. Comparison is checked at drive off or every 7 milliseconds.
2. Continuity is checked continuously.
3. Phase length supervision is checked every 7 milliseconds.

Set Condition
If the sensor signal is missing, as soon as vehicle speed exceeds 12 mph the DTC will set. If during an ABS stop, the CAB commands any valve solenoid on for an extended length of time, and does not see a corresponding heel speed change, the DTC is set.

POSSIBLE CAUSES
CAB CONNECTOR OBSERVABLE DEFECT
LEFT FRONT WSS CIRCUITS SHORTED TOGETHER
TONE WHEEL DEFECTIVE
LEFT FRONT WSS AIR GAP OUT OF SPECIFICATION
WHEEL BEARING CLEARANCE OUT OF SPECIFICATION
LEFT FRONT WSS DEFECTIVE
LEFT FRONT WSS OBSERVABLE DEFECT
NO PROBLEM FOUND