Symptom List:
PCM STATUS FAILURE
SERIAL LINK EXTERNAL FAULT
Test Note: All symptoms listed above are diagnosed using the same tests.
The title for the tests will be PCM STATUS FAILURE.
When Monitored and Set Condition:
PCM STATUS FAILURE
When Monitored: With the ignition on.
Set Condition: This DTC exists when a PCM STATUS message was not received from the
PCM for at least 20.0 consecutive seconds.
SERIAL LINK EXTERNAL FAULT
When Monitored: At ignition on, after ignition on during any rolling code handshake that
occurs with the PCM due to a SKIM reset, or during SECRET KEY transfers to the PCM.
Set Condition: When the SKIM does not receive an expected PCI BUS message trans-
mission acknowledgement from the PCM after 3 transmit attempts.
POSSIBLE CAUSES
INTERMITTENT WIRING HARNESS PROBLEM
WIRING HARNESS INSPECTION
SKIM/PCM
TEST ACTION APPLICABILITY
1 NOTE: Ensure the PCM has proper power and ground connections before
continuing.
With the DRBIIIt, read and record the SKIM DTCs then erase the SKIM DTCs.
Turn the ignition off.
Wait 2 minutes.
Turn the ignition on.
With the DRBIIIt, read the SKIM DTCs.
Does the DRBIIIt display the DTC that was previously erased?
All
Yes → Go To 2
No → Go To 4
304
SENTRY KEY IMMOBILIZER
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