P0633 SKIM SECRET KEY NOT ENTERED
When Monitored and Set Condition:
When Monitored: While the key is on.
Set Condition: The SKIM secret key was not calibrated into the ECM.
POSSIBLE CAUSES
- IMPROPER IGNITION KEY IS BEING USED
- SKIM DTC'S
- SKIM NOT CALIBRATED PROPERLY
DIAGNOSTIC PROCEDURE
-
With the DRBIII®, read SKIM DTCs. Are any SKIM DTCs present?
Yes --> Repair all SKIM DTCs first. Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL).
No --> Go To 2 -
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 VER - 1 (DIESEL). -
Using the DRBIII®, recalibrate the ECM with the proper SKIM secret key. With the DRBIII®, erase DTCs. Cycle the ignition switch from on to off to on. With the DRBIII®, read DTCs. Did the DTC reset?
Yes --> Test Complete.
No --> Verify information is correct and replace ECM. Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL).
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