P0633-SKIM SECRET KEY NOT STORED IN PCM

For a complete wiring diagram Refer to Section 8W.

When Monitored:
Ignition on.
Set Condition:
The SKIM Key information has not been programmed into the PCM. One Trip Fault. Three good trips to turn off the MIL.

Possible Causes

PROGRAMMING SKIM KEY INTO THE PCM

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).

Diagnostic Test

1. PROGRAMMING SKIM KEY INTO THE PCM

Ignition on, engine not running.
With a scan tool, erase DTCs.
Using the scan tool, program the Secret Key information into the PCM using the PCM replaced function under the WCM menu.
Start the engine.

NOTE: If the engine will not start, crank the engine over for 15 seconds. Crank at least 2 times with the ignition switch returning to the off position each time.

Allow the engine to reach normal operating temperature.
With the scan tool, select View DTCs.

Does the DTC reset?

Yes

Replace and program the Powertrain Control Module per Service Information.

Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)

No

The SKIM KEY information has been successfully programmed into the PCM. Test is complete.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)