Chrysler PT Cruiser 2001 Service Manual Supplement page 2494

COMMUNICATION
Symptom:
P1687-NO CLUSTER BUS MESSAGE
When Monitored and Set Condition:
P1687-NO CLUSTER BUS MESSAGE
When Monitored: With the ignition on.
Set Condition: The PCM has not received an expected MIC status bus message from the
Instrument Cluster within the last 20 seconds.
INSTRUMENT CLUSTER
WIRING HARNESS INTERMITTENT
PCI BUS CIRCUIT OPEN FROM PCM TO MIC
TEST
1 Turn the ignition on.
Using the DRB, erase PCM codes.
Cycle the ignition key on and off several times.
With the DRB, read PCM codes. LOOK for P1687.
Did the P1687 NO CLUSTER BUS MESSAGE trouble code return?
Yes → Go To 3
→ Go To 2
No
2 Turn the ignition on.
Does the Odometer in the Instrument Cluster display NO BUS?
Yes → Go To 3
→ Go To 4
No
3 Turn the ignition off.
Disconnect the PCM harness connectors.
Disconnect the Instrument Cluster harness connectors.
Measure the resistance of the PCI Bus circuit between the PCM harness connector
and the Instrument Cluster harness connector.
Is the resistance below 5.0 ohms?
Yes → Replace the Instrument Cluster.
→ Repair the PCI Bus circuit for an open.
No
POSSIBLE CAUSES
ACTION
Perform POWERTRAIN VERIFICATION TEST VER - 1.
Perform POWERTRAIN VERIFICATION TEST VER - 1.
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APPLICABILITY
All
All
All