Chrysler PT Cruiser 2001 Service Manual Supplement page 1979

BRAKES (CAB)
Symptom:
LEFT FRONT SENSOR SIGNAL FAILURE
When Monitored and Set Condition:
LEFT FRONT SENSOR SIGNAL FAILURE
When Monitored: Wheel speed comparison is checked at drive off or every 7 milliseconds
(ms). Wheel speed continuity is checked every 7 milliseconds. Wheel speed phase length
supervision is checked every 7 milliseconds.
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.
TONE WHEEL DEFECTIVE
LEFT FRONT WHEEL SPEED SENSOR SIGNAL
INTERMITTENT SIGNAL DTC
LEFT FRONT WHEEL SPEED SENSOR OR CONNECTOR DAMAGED
LEFT FRONT WHEEL BEARING OUT OF SPECIFICATION
LEFT FRONT WHEEL SPEED SENSOR FUNCTIONAL TEST
LEFT FRONT WHEEL SPEED SENSOR AIR GAP OUT OF SPECIFICATION
CAB - UNABLE TO READ LEFT FRONT WHEEL SPEED SENSOR SIGNAL
TEST
1 Turn ignition on.
With the DRBIII , read DTC's.
Are the Left Front Sensor Signal Failure and Left Front Sensor Circuit Failure
DTC's present now?
Yes → Refer to symptom LEFT FRONT SENSOR CIRCUIT FAILURE
No
2 Turn ignition on.
Have an assistant drive the vehicle while you monitor the Left Front Wheel Speed
Sensor Signal, using the DRBIII .
Slowly accelerate as straight as possible from a stop to 24 Km/h (15 Mph).
With the DRBIII , monitor all wheel speed sensor signals.
Did the Left Front Wheel Speed Sensor Signal show 0 Km/h (0 Mph)?
Yes → Go To 3
No
POSSIBLE CAUSES
ACTION
in the BRAKES (CAB) category.
→ Go To 2
→ Go To 10
22
APPLICABILITY
All
All