Sentry Key Remote Entry System (SKREES)

The Sentry Key Remote Entry Module (SKREEM), sometimes referred to as the Wireless Control Module (WCM), receives an encrypted Radio Frequency (RF) signal from the transponder key. The SKREEM/WCM then decrypts the signal and broadcasts the requested remote commands to the appropriate modules in the vehicle over the Controller Area Network (CAN) data bus. A valid transponder key ID must be incorporated into the RF signal in order for the SKREEM/WCM to pass the message on to the appropriate modules.

Automatic transponder key synchronization is done by the SKREEM/WCM if a valid transponder key is inserted into the ignition cylinder, and the ignition is turned ON. This provides a maximum operation window for RKE functions.

Each Sentry Key Remote Entry System (SKREES), sometimes referred to as the Sentry Key Immobilizer System (SKIS), consists of a SKREEM/WCM and a transponder key. Each system has a secret key code unique to that system. The secret key is electronically coded in the SKREEM/WCM and in all programmed transponder keys. It is used for immobilization and RKE functions for data security. In addition, each transponder key will have a unique identification.

NOTE: After a SKREEM/WCM is replaced, the ignition/transponder keys need to be programmed to the new SKREEM/WCM. Follow the directions on the diagnostic scan tool. The transponder key for the SKREES/SKIM and the RKE will both be programmed during this operation. There is no need to program the fob of the key for RKE functionality once the transponder key is programmed to the new SKREEM/WCM.