Chrysler 300/300 Touring/300C, Dodge Magnum. Manual - part 793
OPERATION
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 Con-
troller 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.
REMOTE KEYLESS ENTRY (RKE)
After pressing the lock button on the RKE transmitter, all of the door locks will lock, the illuminated entry will turn off
(providing all doors are closed), and the Vehicle Theft Security System (VTSS) (if equipped) will arm. After pressing
the unlock button, on the RKE transmitter, one time, the driver door lock will unlock, the illuminated entry will turn on
the courtesy lamps, and the VTSS (if equipped) will disarm. After pressing the unlock button a second time, the
remaining door locks will unlock. The Electronic Vehicle Information Center (EVIC) or a scan tool can reprogram this
feature to unlock all of the door locks with one press of the unlock button. If the vehicle is equipped with the mem-
ory system, the memory message will identify which transmitter (1 or 2) sent the signal. Refer to Overhead Console/
Electronic Vehicle Information Center for more information on customer programmable features.
The SKREEM/WCM is capable of retaining up to 8 individual access codes (8 transmitters). If the PRNDL is in any
position except park, the SKREEM/WCM will disable the RKE. The 4 button transmitter uses 1-CR2032 battery. The
minimum battery life is approximately 4.7 years based on 20 transmissions a day at 84°F (25°C). Use a scan tool
or the Miller Tool 9001 RF Detector to test the RKE transmitter. Use a scan tool or the customer programming
method to program the RKE system. However, the SKREEM/WCM will only allow RKE programming when the igni-
tion is in the ON position, the PRNDL is in park position, and the VTSS (if equipped) is disarmed.
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.
TIRE PRESSURE MONITORING (TPM)
The SKREEM monitors the signals from the tire pressure sensor/transmitters and determines if any tire has gone
below the low pressure threshold LOW TIRE PRESSURE THRESHOLDS table.
LOW TIRE PRESSURE THRESHOLDS
SYSTEM STATUS
INDICATOR
TIRE PRESSURE
ON
172 kPa (25 PSI)
OFF
207 kPa (30 PSI)
8Q - 140
VEHICLE THEFT SECURITY - SERVICE INFORMATION
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