Circuit Operation
The Content Theft Deterrent (CTD) system is contained in the
body control module (BCM). The CTD system allows a variable entry
time into the vehicle before sounding the alarm. The CTD system is disabled
when the ignition key is inserted into the ignition key lock cylinder and
turning the ignition switch to the ON position. The CTD system consists
of the following components:
| • | Body control module (BCM) |
| • | Remote control door lock transmitter |
| • | Theft deterrent shock sensor |
The use of the transmitter is the primary method of arming the CTD system.
The transmitter has four push buttons which perform the following functions:
| • | Lock the vehicle door and arm the CTD system |
| • | Unlock the vehicle doors and disarm the CTD system |
| • | Open the rear compartment. |
| • | Initiate the Panic mode during which the horns sound and park
lamps flash |
The side door lock switches can also be used to arm and disarm the CTD
system. The security indicator LED flashes to confirm the system is armed.
The LED is visible on top of the instrument panel to provide the system
status and as a warning to intruders. The status of the CTD system can be
determined by the output of the LED as described below:
- The LED flashes once per second with a door open and the CTD system
unarmed.
- The LED is on steady when the CTD system is waiting for the doors
to close before arming.
- The LED flashes briefly every two seconds when the CTD system
is armed.
- The LED flashes twice every two seconds when the CTD system has
sounded the alarm due to an impact to the vehicle.
- The LED flashes three times every two seconds when the CTD system
has sounded the alarm due to the opening of a door or the rear compartment.
- The LED is off when the CTD system is off, disarmed, or the vehicle
doors are open for longer than ten minutes.
The theft deterrent shock sensor detects impacts to the vehicle. The
shock sensor determines the level of the impact to the vehicle and signals
the BCM to sound one of the following alarm cycles:
| • | For low level impacts to the vehicle, the BCM sounds the horn
and flashes the park lamps twice. |
| • | For high level impacts to the vehicle, the BCM repeatedly sounds
the horn and flashes the park lamps. |
The shock sensor is ignored by the BCM under any of the following conditions:
| • | The ignition switch is in the ON position |
| • | The rear compartment lid is open |
| • | Up to five seconds after the CTD system is armed |
| • | When feature customization is used to disable the UTD system |
When armed, the CTD system will monitor the following to determine when
to sound an alarm:
| • | Ignition key lock cylinder |
| • | Theft deterrent shock sensor |
| • | Rear compartment lid ajar indication switch |
The CTD system provides vehicle security along with the PASS-Key®
II Vehicle Theft Deterrent (VTD) system by controlling the following:
| • | Visual alarm (park lamps) |
