Symptom:
NO PCM MESSAGES RECEIVED
When Monitored and Set Condition:
NO PCM MESSAGES RECEIVED
When Monitored: With the ignition on or in the run position.
Set Condition: The RKE Module does not receive any PCM messages for 12 seconds.
POSSIBLE CAUSES
NO PCM MESSAGES RECEIVED
ATTEMPT TO COMMUNICATE WITH THE PCM
PCI BUS CIRCUIT OPEN
POWERTRAIN CONTROL MODULE
TEST ACTION APPLICABILITY
1 Turn the ignition on.
With the DRB, enter SYSTEM MONITORS then J1850 MODULE SCAN.
Is the PCM present on the bus?
All
Yes → With the DRB, erase DTCs. Cycle the ignition switch and check
for DTCs. If DTC resets, replace the RKE Module.
Perform BODY VERIFICATION TEST - VER 1.
No → Go To 2
2 Turn the ignition on.
With the DRB, attempt to communicate with the PCM.
Was the DRB able to communicate with the PCM?
All
Yes → Go To 3
No → Refer to thecommunication category and perform the appropriate
symptom.
Perform BODY VERIFICATION TEST - VER 1.
3 Turn the ignition off.
Disconnect the PCM harness connectors.
Disconnect the RKE Module harness connector.
Measure the resistance of the PCI Bus circuit between the RKE Module connector
and the PCM connector.
Is the resistance below 5.0 ohms?
All
Yes → Replace the Powertrain Control Module.
Perform BODY VERIFICATION TEST - VER 1.
No → Repair the PCI Bus circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
188
POWER DOOR LOCKS/RKE
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