Content Theft Deterrent (CTD) Description and Operation
Content Theft Deterrent (CTD) Description and Operation
The Content Theft Deterrent (CTD) System, when armed, is designed to deter vehicle content theft by pulsing the horns and exterior lamps for approximately 30 seconds when an unauthorized vehicle entry is detected. However, the CTD system does not affect engine starting.
An unauthorized entry can be any of the following with the CTD system armed:
* When the rear compartment has been opened without the use of the keyless entry system.
* When any door is opened without first being unlocked using the keyless entry transmitter.
The security indicator, located on the instrument panel cluster, will turn on to indicate that arming has been initiated. Once the system is armed, the security Indicator will flash once every three seconds. If the security indicator is flashing twice per second, this means that a door is open.
The components of the system are:
* The body control module
* The door ajar switches
* The rear compartment lid ajar switch
Arming the System
Important:
* The Content Theft Deterrent (CTD) System can be armed with the windows open or top down.
* The system is not armed if the doors are locked manually. The keyless entry transmitter or the door lock switch must be used to arm the CTD system.
The system will arm after any of the following occur with the ignition OFF:
* Thirty seconds after all the doors are closed.
* Sixty seconds with any door open.
* Press the lock button on the transmitter 2 times with all the doors.
Disarming the System/Silencing an Alarm
Important: Manually unlocking the doors does not disable the Content Theft Deterrent (CTD) System armed mode. Also, disconnecting the battery or pulling fuses does not disable the armed mode, as the BCM stores the CTD status in memory.
The system can be disarmed by doing any one of the following:
* Press the unlock button on the remote keyless entry transmitter.
* Insert a valid key into the ignition and start the vehicle.
The system can be silenced without disarming by pressing the lock button on the remote keyless entry transmitter.
If the system is armed and the trunk is opened using the trunk release button on the transmitter, the system will temporarily disarm itself and re-arm when the trunk has been closed. This allows you to exit the vehicle, lock the doors using the transmitter, or open the trunk using the transmitter without having to disarm and re-arm the system. Once the system is disarmed, the security light will stop flashing.
CTD Circuit Description
The following is a description of each component used in the Content Theft Deterrent (CTD) System:
Body Control Module (BCM)
The CTD system is an internal function of the body control module (BCM) which utilizes serial data and various switch inputs to perform CTD functions.
The BCM monitors the following inputs:
* The door ajar switches
* The rear compartment lid ajar switch
* The keyless entry transmitter LOCK/UNLOCK buttons
* The vehicle theft deterrent (VTD) status - The BCM uses the VTD status for disarming the system or silencing and alarm when the correct vehicle key is used to start the vehicle.
When the BCM detects an unauthorized entry, it activates the horns and exterior lamps for 30 seconds. Following the 30-second alarm period is a 10-second time-out. The system will then re-arm.
Door Ajar Switches
The CTD system uses the door ajar switches as a status indicator to activate the alarm. Door ajar switches are monitored via a discrete input from the switch to the BCM. If the BCM receives a ground signal from a door ajar switch when the CTD system is armed, the BCM activates the alarm.
Rear Compartment Lid Ajar Switch
The CTD system uses the rear compartment lid ajar switch as a status indicator to activate the alarm. The rear compartment lid ajar switch is monitored via a discrete input from the switch to the BCM. If the BCM receives a ground signal from the lid ajar switch when the CTD system is armed, the BCM activates the alarm.