The VTSS will not arm if the doors are locked using
the key in the lock cylinder or using the mechanical
lock button.
Active arming of the VTSS occurs when the
Remote Keyless Entry (RKE) transmitter is used to
lock the vehicle. For active arming to occur, the doors
and liftgate must be closed and the ignition switch
must be in the Off position when the RKE transmit-
ter Lock button is depressed. However, once the
VTSS arming process has been completed, the igni-
tion switch can be turned to the Accessory position
without triggering the alarm.
Once the VTSS begins passive or active arming,
the security lamp in the instrument cluster will flash
rapidly for about fifteen seconds. This indicates that
the VTSS arming is in progress. Turning a key in the
ignition switch, opening a door or the liftgate, or
unlocking a door or the liftgate by any means during
the fifteen second arming process will cause the secu-
rity lamp to stop flashing and the arming process to
abort. Once the fifteen second arming function is suc-
cessfully completed, the security lamp will flash at a
slower rate to indicate that the VTSS is armed.
DISARMING
Passive disarming of the Vehicle Theft Security
System (VTSS) occurs when the vehicle is unlocked
using the key to unlock either front door or the lift-
gate. Active disarming of the VTSS occurs when the
vehicle is unlocked by depressing the Unlock button
of the Remote Keyless Entry (RKE) transmitter.
Once the alarm has been activated (horn sounding,
headlamps flashing, and the engine no-run feature),
either disarming method will also deactivate the
alarm.
POWER-UP MODE
When the armed Vehicle Theft Security System
(VTSS) senses that the battery has been disconnected
and reconnected, it enters its power-up mode. In the
power-up mode the alarm system remains armed fol-
lowing a battery failure or disconnect. If the VTSS
was armed prior to a battery disconnect or failure,
the system will have to be actively or passively dis-
armed after the battery is reconnected.
The power-up mode will also apply if the battery
goes dead while the system is armed, and battery
jump-starting is attempted. The engine no-run fea-
ture will prevent the engine from starting until the
alarm system has been actively or passively dis-
armed.
TAMPER ALERT
The Vehicle Theft Security System (VTSS) tamper
alert will sound the horn three times upon disarm-
ing, if the alarm was triggered and has since timed-
out (about fifteen minutes). This feature alerts the
vehicle operator that the VTSS was activated while
the vehicle was unattended.
DESCRIPTION AND OPERATION
CENTRAL TIMER MODULE
Two versions of the Central Timer Module (CTM)
are available on this vehicle, a base version and a
high-line version. The base version of the CTM is
used on base models of the vehicle. The base version
of the CTM combines the functions of a chime/buzzer
module, an intermittent wipe module and an illumi-
nated entry module into a single unit. The base CTM
also uses inputs from the door ajar switches, the
headlamp switch and the key-in ignition switch to
control the output to the dome lamp circuits, which
allows the base CTM to provide load shedding to help
protect the battery from becoming discharged.
The high-line version of the CTM is used on high-
line vehicles. The high-line CTM provides all of the
functions of the base version CTM, but also is used to
control and integrate many of the additional elec-
tronic functions and features included on the high-
line models. The high-line version of the CTM
contains a central processing unit and interfaces with
other modules in the vehicle on the Chrysler Colli-
sion Detection (CCD) data bus network.
The CCD data bus network allows the sharing of
sensor information. This helps to reduce wire har-
ness complexity, reduce internal controller hardware,
and reduce component sensor current loads. At the
same time, this system provides increased reliability,
enhanced diagnostics, and allows the addition of
many new feature capabilities.
One of the features that the high-line CTM sup-
ports and controls is the Vehicle Theft Security Sys-
tem (VTSS). In the VTSS, the CTM receives hard-
wired inputs from the door and liftgate ajar, door and
liftgate lock cylinder, and ignition switches. The pro-
gramming in the CTM allows it to process the infor-
mation from these inputs and send control outputs to
energize or de-energize the headlamp (or security)
relay, horn relay, and the security lamp. The CTM
also sends CCD data bus messages to the Powertrain
Control Module (PCM) to control the engine no-run
feature of the VTSS
The high-line CTM also contains the receiver and
control logic for the power lock and Remote Keyless
Entry (RKE) systems, which are integrated into the
arming, disarming, and triggering functions of the
VTSS.
Both versions of the CTM are mounted under the
passenger side end of the instrument panel, outboard
of the instrument panel glove box opening. Refer to
Central Timer Module in the Removal and Installa-
8Q - 2 VEHICLE THEFT/SECURITY SYSTEMS DN
GENERAL INFORMATION (Continued)
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