Left Front Wheel Speed Signal Failure; Rear Wheel Speed Signal Failure; Right Front Wheel Speed Signal Failure - Jeep KJ Liberty Cherokee 2003 Service Manual

BRAKES (CAB)
Symptom List:

LEFT FRONT WHEEL SPEED SIGNAL FAILURE

REAR WHEEL SPEED SIGNAL FAILURE

RIGHT FRONT 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: Ignition on. Wheel speeds are 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.
REAR WHEEL SPEED SIGNAL FAILURE
When Monitored: Ignition on. Wheel speeds are 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: Ignition on. Wheel speeds are 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.
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
POSSIBLE CAUSES
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