P0633

P0633-SKIM SECRET KEY NOT STORED IN PCM

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

- When Monitored:
While the key is on.

- Set Condition:
The SKIM secret key was not calibrated into the Powertrain Control Module (PCM).





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

1. SKIM DTCs
1. With the scan tool, read WIN DTC.

Are any SKIM DTCs present in the WIN?

Yes

- Repair all SKIM DTCs first.
- Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Powertrain Verification Test.

No

- Go To 2

2. SKIM NOT CALIBRATED PROPERLY
1. Using the scan tool, recalibrate the PCM 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 the POWERTRAIN VERIFICATION TEST - 6.7L. Powertrain Verification Test.

Yes

- Replace the Powertrain Control Module.
- Perform the POWERTRAIN VERIFICATION TEST - 6.7L. Powertrain Verification Test.