Left Rear Sensor Signal Failure

Tests 1 And 2:

Tests 3 Through 7:

Tests 8 And 9:

Symptom:
LEFT REAR SENSOR SIGNAL FAILURE

When Monitored and Set Condition:
LEFT REAR 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 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
CAB CONNECTOR OBSERVABLE DEFECT
LEFT REAR WHEEL SPEED SENSOR CIRCUITS SHORTED TOGETHER
TONE WHEEL DEFECTIVE
LEFT REAR WHEEL SPEED SENSOR AIR GAP OUT OF SPECIFICATION
LEFT REAR WHEEL BEARING CLEARANCE OUT OF SPECIFICATION
LEFT REAR WHEEL SPEED SENSOR SENSOR DEFECTIVE
LEFT REAR WHEEL SPEED SENSOR SENSOR OBSERVABLE DEFECT