Normal Operation

Remote locking and unlocking of the doors, activating the panic alarm, and releasing the luggage compartment lid latch is accomplished by the smart junction box (SJB) receiving a command message from the RKE transmitter through the tire pressure monitoring system/remote keyless entry (TPMS/RKE) antenna. The SJB processes the command and provides the appropriate output. The RKE transmitters and SJB also utilize a rolling code to prevent the code from being "captured" by a code grabber. The system advances the counter in the RKE transmitter and SJB every time an RKE transmitter button is pressed.

The TPMS/RKE antenna is located externally on the SJB.

• DTC B2425 (Remote Keyless Entry Out of Synchronization) - is a continuous DTC that sets when the SJB detects the rolling counter received from an RKE transmitter is 1,024 times or greater than the rolling counter stored in the module.

This pinpoint test is intended to diagnose the following:

• RKE transmitter battery
• RKE transmitter programming
• RKE transmitter
• RKE transmitter button pressed a substantial amount of times while outside the range of the vehicle
• SJB