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P0604-INTERNAL CONTROL MODULE RAM For the Transmission circuit diagram (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 42RLE - SCHE- For a complete wiring diagram Refer to Section 8W. • When Monitored: • Set Condition: Possible Causes PCM - INTERNAL ERROR Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 21 - TRANSMIS- Theory of Operation After the controller is reset, the microprocessor checks the integrity of each RAM location by writing to it and read- Diagnostic Test 1. PCM - INTERNAL ERROR Using the schematics as a guide, inspect the wiring and connectors. Repair as necessary. Pay particular attention If there are no possible causes remaining, view repair. Repair Replace the Powertrain Control Module. With the scan tool perform QUICK LEARN, then program Pin- Perform 42RLE TRANSMISSION VERIFICATION TEST - VER 1. HB AUTOMATIC TRANSMISSION 42RLE - ELECTRICAL DIAGNOSTICS 21 - 17 |