Function Actuator

The Remote Function Actuation (RFA) system performs the following functions:
^ Transmitter remote control of various vehicle systems without physical contact of any switches on the vehicle
^ Tire Pressure Monitoring (TPM) system functions

Refer to Tire Pressure Monitor System.

The RFA system consists of the following components:
^ A transmitter located on the operator's key fob
^ A receiver
^ An integral antenna

The RFA system does not directly control its functions. but relies on one of the following systems in order to perform the driver commands:
^ The Body Control Module (BCM) - in order to provide Universal Theft Deterrent (UTD), hatch release, horn, and vehicle lamp control
^ The Door Control Module (DCM) - in order to provide all door lock functions
^ The Instrument Panel Cluster (IPC) - in order to provide RFA system programming and vehicle personalization functions.

When the RFA receives a command from the transmitter, a message is sent via the serial data line to the system module capable of performing the needed function.

The RFA system is intended to be used as a supplementary to the vehicles conventionally operated lock/unlock system. It is not intended to replace, but should be used in conjunction with the door lock key. The system could disable due to radio frequency interference or a low transmitter battery. Therefore, always maintain vehicle access with a door key.