The CTD system (when armed) is designed to deter vehicle content theft by pulsing the horns and exterior lamps for approximately two minutes when an unauthorized vehicle entry is detected. The CTD system also disables engine starting when an unauthorized entry is detected.

An unauthorized entry can be any of the following with the CTD system armed:

The components of the system are:

Use the following procedure in order to arm the system:

1. Place the shift lever in P (park).
2. Turn OFF the ignition.
3. Open any door.

Important: The system is not armed if the doors are locked manually, the power door lock switch or keyless entry transmitter (if equipped) must be used to arm the CTD system.

4. Lock the doors with the power door lock switch or the LOCK button on the transmitter (if equipped). The system is in standby mode and will not start the arming timer until all doors are closed.
5. The system will arm approximately 30 seconds from the time that the last door is closed. This delay is shown by the SECURITY indicator ON STEADY. When the indicator transitions to OFF, the system is armed.

Locking the vehicle may be accomplished without arming the CTD system. Use of the manual door locks or using the key to lock the doors will lock the vehicle but will not arm the CTD system.

If system arming has been requested by the power door lock switch or the transmitter, it must be disarmed.

Important: Using the power door unlock switch or manually unlocking the doors does not disable the CTD arm mode. Also, disconnecting the battery or pulling fuses does not disable the arm mode, since the BCM stores the CTD mode status in memory.

The following is a description of each component used in the CTD system:

The keyless entry system can arm and disarm the CTD system. When the remote control door lock receiver (RCDLR) receives a door lock or unlock signal from the transmitter, the RCDLR sends a class 2 message to the body control module (BCM) to perform the appropriate arm/disarm functions.

The CTD system is an internal function of the Body Control Module (BCM) which utilizes class 2 serial data and various switch input information to perform CTD functions. When the BCM detects an unauthorized entry, it activates the horns and exterior lamps. The BCM has five basic modes (disarmed, standby, delayed, armed, and alarm) for operating the CTD system. The different modes are described below.

1. When the CTD system is in the disarmed mode, ignition is OFF and any door is open, the BCM commands the instrument cluster to flash the SECURITY indicator via the class 2 serial data circuit. The BCM has the CTD system in the disarmed mode until the following conditions are detected:

•	Ignition key turned to the OFF position.

•	Any door open.

•	Doors locked by either the power door lock switch or the LOCK button on the transmitter (if equipped).

2. The BCM enters the standby mode when the above conditions are detected. In standby mode, the BCM commands the SECURITY indicator to illuminate ON steady. If all the doors are closed and the LOCK button on the transmitter (if equipped) is used, the BCM enters the delayed mode.
3. When the last door is closed, the BCM remains in the delayed mode for 30 seconds. In delayed mode the BCM commands the SECURITY indicator to illuminate ON steady.
4. After 30 seconds, the BCM enters the armed mode. In armed mode, the BCM commands the SECURITY indicator OFF. Any forced entry activates the alarm mode.
5. When the BCM detects a forced entry, the BCM enters the alarm mode. The BCM activates exterior lamps for 2 minutes and the horns for 30 seconds. This is followed by a three minute time-out of the horns, with the horns no longer active. If no new intrusions are detected during the time-out, the horns remain inactive. The system must be disarmed or the intrusion condition removed after the time-out for the system to exit alarm mode.

The door ajar switches are an internal function of the door latches. The CTD system uses the door ajar switches as one method to activate the alarm. The body control module (BCM) monitors all door ajar switches via a discrete input from each door ajar switch, including the rear compartment. If the BCM receives a ground signal from a door ajar switch or hatch/trunk ajar switch when the CTD system is armed, the BCM activates the alarm.

The ignition lock cylinder contains contact terminals that mate with the resistor pellet in the ignition key when the ignition key is inserted into the lock cylinder. When the correct ignition key is inserted into the lock cylinder, the BCM will either silence an alarming system or disarm a system in standby mode.

The drivers door key switch is an internal function of the driver door latch. The door key switch use's a discrete input to the BCM. The BCM utilizes this input to disarm the CTD system. Inserting a key and turning to the unlock position will disarm the CTD system.

The door key switches are an internal function of the driver and passenger door latches. The door key switches use a discrete input to the BCM. The BCM utilizes each of these inputs to disarm the CTD system. Inserting a key and turning to the unlock position will disarm the CTD system.

The power door lock switches are used to either arm or disarm the CTD system. Pressing the lock position will cause the CTD to arm after all doors are closed and the 30 second delay period has elapsed. Pressing the unlock position with the CTD system in any mode except ARMED will cause the CTD system to enter the disarm mode.

The CTD system can be armed with the windows or sunroof open.

The BCM monitors the following inputs:

Outputs

The BCM controls the following :