CTD System Components
Door Jamb Switches
The CTD system uses the door jamb switches in the door lock assembly
as one method to activate the alarm. The LH Front Door Module (LFDM) monitors
all door jamb switches via a discrete input or the Simple Bus Interface (SBI)
from the other three door modules. If the RIM receives a class 2 message
from the LFDM that a door is open and the CTD system is armed, RIM activates
the alarm.
Hood Ajar Switch (export)
When the hood is opened the switch closes. When the RIM detects the
hood ajar switch in a closed condition and the CTD system is armed, the RIM
activates the alarm.
Rear Compartment Tamper Switch
The rear compartment lid is equipped with a lock cylinder tamper switch.
Any rotation or in/out movements caused by a forced entry, result in the switch
closing. When the RIM detects the rear compartment tamper switch in a closed
condition and the CTD system is armed, the RIM activates the alarm.
Remote Keyless Entry (RKE) Module
The RKE system can arm and disarm the CTD system. When the RKE module
receives a door lock or unlock signal from the transmitter, the RKE module
sends a class 2 message to the RIM to perform the appropriate arm/disarm
functions.
Rear Integration Module (RIM)
The CTD system is an internal function of the Rear Integration Module
(RIM) which utilizes class 2 serial data and various switch input information
to perform CTD functions. When the RIM detects an unauthorized entry it
commands the Dash Integration Module (DIM) to activate the horns and exterior
lamps via the class 2 serial data line. The RIM has five basic modes (disarmed,
standby, delayed, armed, and alarm) for operating the CTD system. The different
modes are described below.
- The RIM has the CTD system in a disarmed mode until the following
conditions are detected:
| • | Ignition key turned to the OFF position. |
| • | Doors locked by either the power door lock switch or the LOCK
button on the transmitter. |
- The RIM enters the standby mode when the above conditions are
detected. In standby mode the RIM commands the instrument cluster to flash
the SECURITY indicator via the class 2 serial data line. (If all the doors
are closed and the LOCK button on the transmitter is used, the RIM enters
the delayed mode (step 3).
- When the last door, rear compartment lid, or hood (export) is
closed, the RIM enters the delayed mode for 30 seconds. In delayed mode the
RIM commands the instrument cluster to illuminate (stop flashing) the SECURITY
indicator via the class 2 serial data line.
- After 30 seconds, the RIM enters the armed mode. In armed mode
the RIM commands the instrument cluster to turn off the SECURITY indicator
via the class 2 serial data line. Any forced entry activates the alarm mode.
- When the RIM detects a forced entry, the RIM enters the alarm
mode. The RIM commands the DIM to activate the horn and exterior lamps for
30 seconds, via a class 2 message. This is followed by a three minute time-out
with the horn no longer active. If no new intrusions are detected after
the time-out, the horn is not active. The system must be disarmed or the
intrusion condition removed after the time-out for the system to exit alarm
mode.
Important: The CTD system can be armed with the windows or sunroof open.
Inputs
The RIM monitors the following inputs:
| • | Driver and passenger door ajar switches, class 2 message from
the LH Front Door Module. |
| • | Driver and passenger power door lock/unlock switches, class 2
message from the LH Front Door Module. |
| • | Driver door lock cylinder switch, class 2 message from the LH
Front Door Module. |
| • | Hood ajar switch (export only), class 2 message from the DIM. |
| • | Rear compartment tamper switch, circuit 305 (BLK). |
| • | Transmitter LOCK/UNLOCK buttons, class 2 message from the Remote
Keyless Entry (RKE). |
Outputs
The RIM commands the DIM to control the following via a class 2 message:
