B1A27

B1A27-SKREEM PROGRAMMING PERFORMANCE



Theory of Operation

Sentry Key Remote Entry Module (SKREEM) is one of the many functions that is a subset of the Wireless Ignition Node (WIN). SKREEM programming takes place during the Fob-Integrated-Key (FOBIK) programming procedure. The repair of this fault condition is dependant on the programmed status of the FOBIK attempting to be programmed.

- When Monitored:
When in FOBIK programming mode and programming is in process, the WIN receives the programmed status of the FOBIK.

- Set Condition:
In the event the user attempts to program a FOBIK that is not valid or has already been programmed to a different vehicle, this Diagnostic Trouble Code (DTC) will be set as active.





Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Wireless Ignition Node (WIN) Pre-Diagnostic Procedure.

1. ENTER PROGRAMMING MODE AND DETERMINE ACTIVE OR STORED DTC
1. Using the scan tool, use the Program Ignition Keys or Key Fobs feature under Miscellaneous Functions.
2. Attempt to program the suspect FOBIK.
3. Wait one minute, and read active codes.

Is the DTC active or stored?

WIN - ACTIVE DTC

- Go To 2

WIN - STORED DTC

- Perform the WIN INTERMITTENT TEST. Wireless Ignition Node (WIN) Intermittent Condition Test.

2. VERIFY THE WIN HAS BEEN PROPERLY INITIALIZED

NOTE: When diagnosing any WIN system concern, all FOBIKS must be present

1. Using the scan tool, read the Number of Key/Fobs Programmed under Data Display.

Does the scan tool show 2 or more Key/Fobs Programmed?

Yes

- Go To 3

No

- Program 2 FOBIKS, then perform the WIN VERIFICATION TEST. Wireless Ignition Node (WIN) Verification Test.

3. CHECK OPERATION OF THE FOBIK IN USE

NOTE: Verify the FOBIK in use is the FOBIK causing the DTC to set.

1. Replace the FOBIK currently in use.
2. Using the scan tool, program a new FOBIK to the WIN.
3. Use the scan tool and erase all codes in the WIN.
4. Turn the Ignition Off, and wait 15 seconds before turning the Ignition On.
5. Wait one minute, and read active codes.

Does the scan tool display this DTC as active?

Yes

- Replace the Wireless Ignition Node. NOTE: Technicians must use the scan tool to perform the WIN Programming procedure after a module replacement.

- Perform the WIN VERIFICATION TEST. Wireless Ignition Node (WIN) Verification Test

No

- Repair is complete.
- Perform the WIN VERIFICATION TEST. Wireless Ignition Node (WIN) Verification Test.