WCM Verification
For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article .
The Sentry Key remote Entry Module (SKREEM) is also known as the Wireless Control Module (WCM). Depending upon model and year of the vehicle being serviced it may be equipped with either a SKREEM or a WCM.
Perform the following after completion of a diagnostic repair:
When entering the PIN, care should be taken because the WCM will only allow 3 consecutive attempts to enter the correct PIN. If 3 consecutive incorrect PIN's are entered the WCM will Lock Out the scan tool. To exit Lock Mode, the ignition key must remain in the Run position for one hour. All accessories must be off. A battery charger connected to the battery during this time period is recommended.
On vehicles equipped with a premium Tire Pressure Monitoring (TPM) system, when the WCM and/or the spare tire pressure sensor is replaced with a new unit, a diagnostic scan tool MUST be used to run a routine that allows the WCM to be programmed with the ID number and location of the spare tire pressure sensor mounted in the wheel of the spare tire. Follow the programming steps outlined in the diagnostic scan tool for "Learn Spare Tire Sensor ID" under "Miscellaneous Functions" for the "WCM/Wireless Control Module" menu item as appropriate. In addition, if the WCM is replaced, the spare tire must be dismounted from its wheel to access and note the ID number on the spare tire pressure sensor so that the ID code for that sensor can be programmed into the new WCM.
- Reconnect the previously disconnected components and connectors.
- Obtain the vehicle's unique Personal Identification Number (PIN) assigned to it's original WCM. This number can be obtained from the original vehicle invoice or from your Service Manager or Parts Manager.