RFA System Functions

The RFA system consists of the following major components:
^ A low power signal transmitter (key fob)
^ A receiver with integrated antenna

The RFA system allows the user to lock or unlock the vehicle through a transmitter located on the user's key fob. The RFA transmitter is a battery powered, water resistant, radio frequency signal generator. The RFA transmitter consists of four manual buttons. The operation of the keyless entry system is described below:

Manual Features
^ Door UNLOCK Button - with a programmed transmitter in range, unlocks the driver and passenger doors (depending on personalized options selected), disarms the theft deterrent system, activates illumination and memory features (if equipped).
^ Door LOCK Button - with a programmed transmitter in range, locks the driver and passenger doors, arms the theft deterrent system.
^ HATCH Button - with a programmed transmitter in range/trans in park (Auto trans) parking brake applied (manual trans), releases the hatch or trunk, disarms the theft deterrent system.
^ PANIC Button - with a programmed transmitter in range (key out of the ignition), activates the horns when pressed.

When the transmitter manual UNLOCK button is pressed once, the transmitter sends an identification code to the receiver to unlock the driver door. The receiver sends the message to the driver DCM on the serial data line to unlock the driver door. The DCM will then unlock the driver door. The BCM also responds to this message and disarms the theft deterrent system. The BCM will also activate the courtesy lamps if the ambient light is low. If the UNLOCK button is pressed again within 10 seconds, the receiver sends a second message to the passenger DCM to unlock the passenger door. The DCM then unlocks the passenger door.

When the transmitter manual LOCK button is pressed, the transmitter sends an identification code to the receiver to lock both doors. The receiver sends the message to both of the DCMs on the serial data line to lock both doors. Both DCM will then lock both doors. The BCM also responds to this message and arms the theft deterrent system.

When the manual HATCH button is pressed, the transmitter sends an identification code to the receiver to release the hatch or trunk. The receiver sends the message through the serial data line to the BCM.

The BCM then disarms the theft deterrent system and activates the hatch or trunk release relay, and the hatch or trunk opens.

When the manual PANIC button is pressed, the transmitter sends an identification code to the receiver to activate the panic mode. The receiver sends the message through the serial data line to the BCM. The BCM activates the horn relay or flashes the lamps (depending on selected personalized options) for 90 seconds or until the panic button is pressed again.

Personalization
The user of the RFA system, will be able to choose from the following personalized options:
^ Whether or not the passenger door unlocks with the driver door.
^ Approach lights illuminate with UNLOCK command (Manual button press only).

Grash2000
System personalization can only be accessed through the DISC by performing the following procedure:
1. Press the RESET button in order to clear any IPC warnings.
2. Press the OPTIONS button on the DISC until the IPC displays PASSIVE UNLK.
3. Using the RESET button, select PASSIVE UNLK DRIVER or PASSIVE UNLK BOTH.
4. Press the OPTIONS button on the DISC until APPROACH LIGHTS is displayed.
5. Using the RESET button, select ON or OFF.

Arming/Disarming Theft Deterrent
When the RFA system sends a lock command on the serial data line to the DCMs, the DCMs will lock the doors and the BCM will arm the theft deterrent system.
The BCM then turns off the courtesy lamps and sound the horn, indicating that the theft deterrent system is armed. Whenever the doors are unlocked or the hatch is release, the BCM disarms the theft deterrent system.

To send a DISARM theft deterrent message to the BCM, the RFA system must see the following conditions:
^ A valid transmitter is in range.
^ The key is not in the ignition.
^ The receiver has identified an active unlock command or the hatch or trunk release command from a valid transmitter.

To send an ARM theft deterrent message to the BCM, the RFA system must see the following conditions:
^ Transmitter LOCK button has been pressed.
^ The key is not in the ignition.