Left Front Sensor Signal Failure

Test 1-2:

Test 3-8:

Test 9:

Symptom:
LEFT FRONT SENSOR SIGNAL FAILURE

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