P0633

P0633-SKIM SECRET KEY NOT ENTERED


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

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding.

Diagnostic Test

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

Q: Are any SKIM DTC's present?

YES: Repair all SKIM DTC's first. Perform the POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). Powertrain Verification Test - Ver 1
NO: Go To 2

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

Q: Are the proper keys being used?

YES: Go To 3
NO: Use the proper key for the vehicle. Perform the POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). Powertrain Verification Test - Ver 1

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

Q: Did the DTC reset?
NO: Test Complete.

YES: Verify information is correct and replace ECM. Perform the POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). Powertrain Verification Test - Ver 1