P0604

P0604-INTERNAL CONTROL MODULE RAM ERROR

For a complete wiring diagram, refer to the Wiring Information.

- When Monitored:
While the key is on.

- Set Condition:
Internal Powertrain Control Module software error. One trip failure illuminates the MIL and three good trips to turn off the MIL.





Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Pre-Diagnostic Troubleshooting Procedure.

Diagnostic Test

1. REFLASH PCM
1. Using the scan tool, reflash the module with latest calibration.

Was the flash successful?

Yes

- Go To 2

No

- Replace the Powertrain Control Module. .
- Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test.

2. POWERTRAIN CONTROL MODULE
1. Run the engine for one minute and shut off.
2. With the scan tool, read DTCs.

Did P0604 set?

Yes

- Replace the Powertrain Control Module. .
- Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test.

No

- Test Complete.