Chrysler PT Cruiser. Manual — part 120
POSSIBLE CAUSES
AFFECTED WHEEL SPEED SENSOR AIR GAP FAULT
WHEEL BEARING FAULT
BRAKE LINING FAULT
AFFECTED WHEEL SPEED SENSOR CIRCUIT FAULT
TEST
ACTION
APPLICABILITY
1
Turn the ignition on.
With the DRBIII
t, read DTCs.
With the DRBIII
t, read and record Freeze Frame information.
NOTE: The ABM must sense ALL 4 wheels at 25 km/h (15 mph) before it will
extinguish the ABS indicators.
Does the DRBIII
t display WHEEL SPEED SENSOR SIGNAL and WHEEL SPEED
SENSOR CIRCUIT?
All
Yes
→ Refer to the affected WHEEL SPEED SENSOR CIRCUIT for the
related symptom(s).
Perform ABS VERIFICATION TEST - VER 1.
No
→ Go To 2
2
Turn the ignition on.
With the DRBIII
t in Sensors, monitor ALL the Wheel Speed Sensor Signals while an
assistant drives the vehicle.
Slowly accelerate as straight as possible from a stop to 24 km/h (15 mph).
Is the affected Wheel Speed Signal showing 0 km/h (0 mph)?
All
Yes
→ Go To 3
No
→ The condition is not present at this time. Monitor DRBIIIt
parameters while wiggling the related wiring harness. Refer to
any Technical Service Bulletins(TSB) that may apply. Visually
inspect the related wiring harness and connector terminals.
Perform ABS VERIFICATION TEST - VER 1.
3
Turn the ignition off.
Inspect the ABM connector, affected Wheel Speed Sensor, and affected Wheel Speed
Sensor connector.
Is the Wheel Speed Sensor or any connector damaged?
All
Yes
→ Repair as necessary.
Perform ABS VERIFICATION TEST - VER 1.
No
→ Go To 4
4
Turn ignition off.
Inspect the affected Tone Wheel for damaged, missing teeth, cracks, or looseness.
NOTE: The Tone Wheel teeth should be perfectly square, not bent, or nicked.
Is the affected Tone Wheel damaged?
All
Yes
→ Replace the Tone Wheel in accordance with the Service Informa-
tion.
Perform ABS VERIFICATION TEST - VER 1.
No
→ Go To 5
23
BRAKES (25E)
LEFT FRONT WHEEL SPEED SENSOR SIGNAL —
Continued
TEST
ACTION
APPLICABILITY
5
Turn the ignition off.
Using a Feeler Gauge, measure the affected Wheel Speed Sensor Air Gap.
NOTE: Refer to the appropriate service information, if necessary, for
procedures or specifications.
Is the Air Gap within specifications?
All
Yes
→ Go To 6
No
→ Repair as necessary.
Perform ABS VERIFICATION TEST - VER 1.
6
Turn the ignition off.
Inspect the wheel bearings for excessive runout or clearance.
NOTE: Refer to the appropriate service information, if necessary, for
procedures or specifications.
Is the wheel bearing clearance within specifications?
All
Yes
→ Go To 7
No
→ Repair as necessary.
Perform ABS VERIFICATION TEST - VER 1.
7
Turn the ignition off.
Visually inspect brakes for locking up due to lining contamination or overheating.
Inspect all components for defects which may cause a WHEEL SPEED SENSOR
SIGNAL DTC to set.
Is any component damaged?
All
Yes
→ Repair as necessary.
Perform ABS VERIFICATION TEST - VER 1.
No
→ Refer to symptom WHEEL SPEED SENSOR CIRCUIT for fur-
ther diagnostics.
Perform ABS VERIFICATION TEST - VER 1.
24
BRAKES (25E)
LEFT FRONT WHEEL SPEED SENSOR SIGNAL —
Continued
Symptom:
MIC MESSAGES NOT RECEIVED
When Monitored and Set Condition:
MIC MESSAGES NOT RECEIVED
When Monitored:
Ignition On - Continuously
Set Condition:
When the ABM detects the MIC is not connected or not functioning
correctly for 10 seconds.
POSSIBLE CAUSES
CHECK FOR DTCS
VERIFY DTC
ATTEMPT TO COMMUNICATE WITH THE MIC
MODULE
TEST
ACTION
APPLICABILITY
1
Turn the ignition on.
With the DRBIII
t, read BCM DTC’s.
Are any Cluster Wakeup Output DTC’s set?
All
Yes
→ Refer to symptom list for problems related to the cluster wakeup
circuit.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 2
2
Turn the ignition on.
With the DRBIII
t, erase DTC’s.
With the DRBIII
t, read DTC’s.
Did this DTC reset?
All
Yes
→ Go To 3
No
→ The condition that caused this DTC is currently not present. Use
the wiring diagrams/schematic as a guide, and inspect the related
wiring harness for a possible intermittent.
Perform BODY VERIFICATION TEST - VER 1.
3
Turn the ignition on.
With the DRBIII
t, attempt to communicate with the Instrument Cluster (MIC).
Was the DRBIII
t able to I/D or communicate with the Instrument Cluster (MIC)?
All
Yes
→ Go To 4
No
→ Refer to the Communication category for the related symptom(s).
Perform BODY VERIFICATION TEST - VER 1.
25
BRAKES (25E)
TEST
ACTION
APPLICABILITY
4
With the DRBIII
t, erase DTC’s.
Cycle the ignition switch from off to on and wait approximately 1 minute.
With the DRBIII
t, read DTC’s.
Did this DTC reset?
All
Yes
→ Replace the module which set the DTC in accordance with the
service information.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Test Complete.
26
BRAKES (25E)
MIC MESSAGES NOT RECEIVED —
Continued
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