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  • P0633 SKIM Secret Key Not Entered

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    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

    1. 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
    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).
    3. 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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