P0633

P0633-SKIM SECRET KEY NOT STORED IN PCM

For a complete wiring diagram refer to the Wiring Information Electrical Diagrams.

- When Monitored:
While the key is on.

- Set Condition:
The SKIM secret key was not calibrated into the ECM.





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

1. SKIM DTC'S
1. With the scan tool, read SKIM DTCs.

Are any SKIM DTC's present?

Yes

- Repair all SKIM DTC's first.
- Perform POWERTRAIN VERIFICATION TEST (DIESEL). Powertrain Verification Test

No

- Go To 2

2. IMPROPER IGNITION KEY IS BEING USED
1. Verify that the proper ignition key is in the ignition lock on the steering column.

Are the proper keys being used?

Yes

- Go To 3

No

- Use the proper key for the vehicle.
- Perform POWERTRAIN VERIFICATION TEST (DIESEL). Powertrain Verification Test

3. SKIM NOT CALIBRATED PROPERLY
1. Using the scan tool, recalibrate the ECM with the proper SKIM secret key.
2. With the scan tool, erase DTCs.
3. Cycle the ignition switch from on to off to on.
4. With the scan tool, read DTCs.

Did the DTC reset?

No

- Test Complete.
- Perform POWERTRAIN VERIFICATION TEST (DIESEL). Powertrain Verification Test

Yes

- Verify information is correct and replace ECM.
- Perform POWERTRAIN VERIFICATION TEST (DIESEL). Powertrain Verification Test