Chrysler PT Cruiser 2001 Service Manual Supplement page 2505

*PCI BUS COMMUNICATION FAILURE —
TEST
3 Turn the ignition off.
Disconnect the PCM C2 harness connector.
Disconnect the DRB from the Data Link Connector (DLC).
Disconnect the negative battery cable.
Measure the resistance of the PCI Bus circuit between the Data Link Connector
(DLC) and the PCM C2 connector.
Is the resistance below 5.0 ohms?
Yes → Go To 4
→ Repair the PCI Bus circuit for an open.
No
4 Note: Reconnect the PCM C2 harness connector and the negative battery
cable.
Turn the ignition on.
Measure the voltage of the PCI Bus circuit at the Data Link Connector (DLC).
Is the voltage above 1.5 volts?
Yes → Go To 5
→ Go To 6
No
5 Turn the ignition off.
Using a voltmeter, connect one end to the PCI Bus circuit at the DLC, and the other
end to ground.
Note: When performing the next step turn the ignition off (wait one minute)
before disconnecting any module. When the module is disconnected turn
the ignition on to check for a short to voltage.
Turn the ignition on.
While monitoring the voltmeter, disconnect each module the vehicle is equipped with
one at a time.
Is the voltage steadily above 1.5 volts with all the modules disconnected?
Yes → Repair the PCI Bus circuit for a short to voltage.
→ Replace the module that when disconnected the short to voltage
No
6 Turn the ignition off.
Disconnect the negative battery cable.
Using a ohmmeter, connect one end to the PCI Bus circuit at the DLC, and the other
end to ground.
While monitoring the ohmmeter, disconnect each module the vehicle is equipped with
one at a time.
Is the resistance below 1000.0 ohms with all the modules disconnected?
Yes → Repair the PCI Bus circuit for a short to ground.
→ Replace the module that when disconnected the short to ground
No
ACTION
Perform BODY VERIFICATION TEST - VER 1.
Perform BODY VERIFICATION TEST - VER 1.
was eliminated.
Perform BODY VERIFICATION TEST - VER 1.
Perform BODY VERIFICATION TEST - VER 1.
was eliminated.
Perform BODY VERIFICATION TEST - VER 1.
Continued
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COMMUNICATION
APPLICABILITY
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