Wheel Speed Signal Failure

Test 1 - 3:

Test 4 - 7:

Symptom List:
LF WHEEL SPEED / SIGNAL FAILURE
LR WHEEL SPEED / SIGNAL FAILURE
RF WHEEL SPEED / SIGNAL FAILURE
RR WHEEL SPEED / SIGNAL FAILURE

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

LF WHEEL SPEED/ SIGNAL FAILURE

When Monitored:
Ignition on. Wheel speed 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.

LR WHEEL SPEED/ SIGNAL FAILURE

When Monitored:
Ignition on. Wheel speed 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.

RF WHEEL SPEED/ SIGNAL FAILURE

When Monitored:
Ignition on. Wheel speed 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.

RR WHEEL SPEED/ SIGNAL FAILURE

When Monitored:
Ignition on. Wheel speed 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