Keyless Entry Receiver: Description and Operation

REMOTE CONTROL DOOR LOCK RECEIVER MODULE SYSTEM
The remote control door lock receiver module system may also arm and disarm the CTD system. When the remote control door lock receiver receives a door lock or an unlock signal from the key fob, the remote control door lock receiver sends a message to the BCM. The message orders the BCM to perform the appropriate door lock/unlock command. The BCM detects the message and performs one of the following functions:
- Locks the doors and enters the armed initiated mode
- Unlocks the doors and enters the ready-to-arm mode

Off State
The CTD system will be in the off state when the ignition switch is in the RUN position and all the doors are closed. The BCM will request the security telltale to remain OFF.

Idle State
The CTD system will be in the idle state when the ignition switch is in the RUN position and any door is open. The BCM will request the security telltale to remain OFF.

Disarmed State
The CTD system will be in the disarmed state when the ignition switch is in the LOCK off position and all the doors are closed. The BCM will request the security telltale to remain OFF.

Ready-to-arm State
The CTD system will be in the ready-to-arm state when the ignition switch is in the LOCK off position and any door opens. The BCM will request the security telltale to flash.

Arm Initiated State
The CTD system will be in the arm initiated state when the ignition switch is in the LOCK off position, any door opens, and the BCM detects a lock command from either the power door lock switch or the remote control door lock receiver. The BCM will request the security telltale to remain ON.

Arm Delay State
The CTD system will enter the arm delay state when the ignition switch is in the LOCK off position, the BCM receives a LOCK command from either the power door lock switch or the remote control door lock receiver and all the doors are closed. The BCM will request the security telltale to remain ON for 15 seconds.

Armed State
The CTD system will enter the armed state after the 15 second delay of the arm delay state, unless the BCM detects any door opening within that time. The BCM monitors the inputs (listed above) in order to determine whether to activate the alarm or to disarm the system. The BCM will request the security telltale to remain OFF.

Alarmed State
The CTD system will enter the alarmed state from the armed state if any door opens. The horns and the exterior lights will alternate off and on for approximately two minutes or until an unlock command is received by the BCM. If the BCM does not receive an unlock command, the CTD system will go back to the armed state. The BCM will request the security telltale to remain off. The CTD system will change from the alarm state to the off state if the vehicle control module (VCM)/powertrain control module (PCM) receives a valid Passlock(tm) ignition key rotation.