Left Front Wheel Speed Signal Failure

Test 1-3:

Test 4-7:

Symptom List:
LEFT FRONT WHEEL SPEED SIGNAL FAILURE
LEFT REAR WHEEL SPEED SIGNAL FAILURE
RIGHT FRONT WHEEL SPEED SIGNAL FAILURE
RIGHT REAR WHEEL SPEED SIGNAL FAILURE

Test Note: All symptoms listed above are diagnosed using the same tests. The title for the tests will be LEFT FRONT WHEEL SPEED SIGNAL FAILURE.

When Monitored and Set Condition:

LEFT FRONT WHEEL SPEED SIGNAL FAILURE

When Monitored:
Wheel speed comparison is checked and verified at drive off and continuously thereafter.

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.

LEFT REAR WHEEL SPEED SIGNAL FAILURE

When Monitored:
Wheel speed comparison is checked and verified at drive off and continuously thereafter.

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.

RIGHT FRONT WHEEL SPEED SIGNAL FAILURE

When Monitored:
Wheel speed comparison is checked and verified at drive off and continuously thereafter.

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.

RIGHT REAR WHEEL SPEED SIGNAL FAILURE

When Monitored:
Wheel speed comparison is checked and verified at drive off and continuously thereafter

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
- Wheel Speed Signal Failure DTC Present
- Affected Wheel Speed Sensor Signal Inoperative
- Affected Wheel Speed Sensor Connector Damaged
- Affected Wheel Speed Sensor Tone Wheel Damaged
- Affected Wheel Speed Sensor Air Gap Fault
- Wheel Bearing Fault
- Brake Lining Fault
- Affected Wheel Speed Sensor Circuit Electrical Fault