CTD System Components
Door Jamb Switches
The CTD system uses the door jamb switches in the door lock assembly
as one method in order to activate the alarm. The driver door module (DDM)
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 DDM that a door is open 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 in order 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,
the RIM 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 illuminate
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.
- When the last door is closed, the RIM enters the delayed mode
for 30 seconds. In delayed mode the RIM commands the instrument cluster
to illuminate 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three minute time-out with the horn no longer active.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 Driver Door Module |
| • | Driver and passenger power door lock/unlock switches, class 2
message from the Driver Door Module |
| • | Driver door lock cylinder switch, class 2 message from
the Driver Door Module |
| • | Hood ajar switch (export only), class 2 message from the
DIM |
| • | Rear compartment tamper switch |
| • | 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:
