Jeep 1996 Grand Cherokee Service Manual - page 424
VEHICLE THEFT/SECURITY SYSTEMS
CONTENTS
page
page
GENERAL INFORMATION
ARMING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
DISARMING . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . 1
POWER-UP MODE . . . . . . . . . . . . . . . . . . . . . . . 2
TAMPER ALERT . . . . . . . . . . . . . . . . . . . . . . . . . 2
DESCRIPTION AND OPERATION
AUTO HEADLAMP RELAY . . . . . . . . . . . . . . . . . 3
BODY CONTROL MODULE . . . . . . . . . . . . . . . . . 2
DOOR AJAR SWITCH . . . . . . . . . . . . . . . . . . . . . 2
DOOR LOCK CYLINDER SWITCH . . . . . . . . . . . . 2
HOOD SWITCH . . . . . . . . . . . . . . . . . . . . . . . . . . 2
HORN RELAY . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
LIFTGATE AJAR SWITCH . . . . . . . . . . . . . . . . . . 2
LIFTGATE LOCK CYLINDER SWITCH . . . . . . . . . 2
LIFTGLASS AJAR SWITCH . . . . . . . . . . . . . . . . . 3
PARK LAMP RELAY . . . . . . . . . . . . . . . . . . . . . . 3
SET LAMP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
DIAGNOSIS AND TESTING
RELAYS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
VEHICLE THEFT SECURITY SYSTEM . . . . . . . . . 3
REMOVAL AND INSTALLATION
AUTO HEADLAMP AND PARK LAMP RELAYS . . 7
DOOR AJAR SWITCH . . . . . . . . . . . . . . . . . . . . . 4
DOOR LOCK CYLINDER SWITCH . . . . . . . . . . . . 4
HOOD SWITCH . . . . . . . . . . . . . . . . . . . . . . . . . . 4
HORN RELAY . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
LIFTGATE AJAR SWITCH . . . . . . . . . . . . . . . . . . 5
LIFTGATE LOCK CYLINDER SWITCH . . . . . . . . . 6
LIFTGLASS AJAR SWITCH . . . . . . . . . . . . . . . . . 6
SET LAMP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
GENERAL INFORMATION
INTRODUCTION
The Vehicle Theft Security System (VTSS) is an
available factory-installed option on this model. This
system is designed to provide perimeter protection
against unauthorized use or tampering by monitoring
the vehicle doors, hood, liftgate, and ignition system.
If unauthorized use or tampering is detected, the sys-
tem responds by sounding the horn, flashing the
exterior lamps, and providing an engine no-run fea-
ture.
Following are some general descriptions of the fea-
tures of the VTSS. Refer to the vehicle owner’s man-
ual for additional information. Refer to 8W-39 -
Vehicle Theft Security System in Group 8W - Wiring
diagrams for complete circuit descriptions and dia-
grams.
ARMING
Passive arming of the VTSS occurs when the vehi-
cle is exited with the key removed from the ignition
switch, the headlamps are turned off, and the doors
are locked using the power lock switch. The power
lock switch will not function if the key is in the igni-
tion switch or the headlamps are on with the driver’s
door open. The VTSS will not arm if either front door
or the liftgate are locked using the key in the lock
cylinder.
Active arming of the VTSS occurs when the
Remote Keyless Entry (RKE) transmitter is used to
lock the vehicle, even if the doors and/or the liftgate
are open when the RKE transmitter Lock button is
depressed. However, the VTSS arming will not be
complete until all the doors and the liftgate are
closed.
Following successful passive or active VTSS arm-
ing, the VTSS set lamp on the top of the instrument
panel will flash rapidly for about 15 seconds after the
illuminated entry system times out. This indicates
that VTSS arming is in progress. If the light stays on
steadily during the arming, it indicates that the hood
switch is closed (the hood is open). The VTSS will
still arm if the hood is open, but the engine compart-
ment will not be protected. Once the 15 second arm-
ing function is complete, the set lamp will flash at a
slower rate to indicate that the VTSS is armed.
DISARMING
Passive disarming of the VTSS occurs when the
vehicle is unlocked using the key to unlock either
front door or the liftgate. Active disarming of the
VTSS occurs when the vehicle is unlocked by
depressing the Unlock button of the RKE transmit-
ter.
Once the alarm has been activated (horn sounding,
lights flashing, and the engine no-run feature), either
disarming method will also deactivate the alarm.
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VEHICLE THEFT/SECURITY SYSTEMS
8Q - 1