PCM Status Failure, Rolling Code Failure, Or Serial Link External Failure
- Using scan tool, read and record Diagnostic Trouble Codes (DTCs). Erase DTCs. Turn ignition off. Wait 10 seconds and turn ignition on. Recheck for DTCs. If DTC resets, go to next step. If DTC does not reset, go to step 4 .
- Turn ignition off. Visually inspect connectors at Powertrain Control Module (PCM) and Sentry Key Immobilizer Module (SKIM) for damaged terminals or chaffed wires. See COMPONENT LOCATIONS . Check wiring harness for damage. Check for related TSBs. If wiring and connectors are okay, go to next step. If any problems are found, repair as necessary. Perform POWERTRAIN VERIFICATION TEST under VERIFICATION TESTS.
- Replace SKIM. See SENTRY KEY IMMOBILIZER MODULE under REMOVAL & INSTALLATION. Using scan tool, erase DTCs. Turn ignition off, then back to RUN position several times, leaving ignition in on position for a minimum of 30 seconds per cycle. Drive vehicle. If DTC does not reset, test is complete. If DTC resets, replace PCM. See POWERTRAIN CONTROL MODULE under REMOVAL & INSTALLATION. Perform POWERTRAIN VERIFICATION TEST under VERIFICATION TESTS.
- Turn ignition off. Visually inspect connectors at Powertrain Control Module (PCM) and Sentry Key Immobilizer Module (SKIM) for damaged terminals or chaffed wires. See COMPONENT LOCATIONS . Check wiring harness for damage. Check for related Technical Service Bulletins. If wiring and connectors are okay, test is complete. If any problems are found, repair as necessary. Perform POWERTRAIN VERIFICATION TEST under VERIFICATION TESTS.