6.7L Diesel

P0604-INTERNAL CONTROL MODULE RAM

For complete wiring diagrams refer to Diagrams/Electrical.


- When Monitored:

While the key is on.

- Set Condition:

Internal ECM software error.







Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding.

Diagnostic Test


1. REFLASH ECM

Using the scan tool, reflash the module with latest calibration

Was the flash successful?

Yes

- Go To 2

No

- Replace the ECM.
- Perform POWERTRAIN VERIFICATION TEST. Powertrain Verification Test

2. ECM

Run the engine for one minute and shut off.

With the scan tool, read DTCs.

Did P0604 set?

Yes

- Replace the ECM.
- Perform POWERTRAIN VERIFICATION TEST. Powertrain Verification Test

No

- Test Complete.