Left Rear Sensor Signal Failure

Tests 1 And 2:

Tests 3 Through 7:

Tests 8 Through 11:

Symptom
LEFT REAR SENSOR SIGNAL FAILURE

When Monitored and Set Condition
LEFT REAR SENSOR SIGNAL FAILURE

When Monitored:
1. Ignition on.
2. The CAB monitors the Wheel Speed signals at all times.
3. Wheel Speed comparison is checked at drive off or every 7 milliseconds.
4. Wheel Speed continuity is checked continuously.
5. Wheel Speed phase length supervision is checked every 7 millisec.

Set Condition:
If the sensor signal is missing, as soon as vehicle speed exceeds 19 km/h (12 mph) the Diagnostic Trouble Code (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 wheel speed change, the DTC is set.

POSSIBLE CAUSES
LEFT REAR WHEEL SPEED SENSOR CIRCUITS SHORTED TOGETHER
LEFT REAR WHEEL SPEED SENSOR DEFECTIVE
LEFT REAR WHEEL SPEED SENSOR OBSERVABLE DEFECT
LEFT REAR WHEEL SPEED SENSOR AIR GAP OUT OF SPECIFICATION
LEFT REAR WHEEL BEARING CLEARANCE OUT OF SPEC
LEFT REAR TONE WHEEL DEFECTIVE
CAB CONNECTOR OBSERVABLE DEFECT