Jeep 1997 Grand Cherokee Service Manual page 561

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VEHICLE THEFT/SECURITY SYSTEMS
GENERAL INFORMATION
ARMING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
DISARMING . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . 1
POWER-UP MODE . . . . . . . . . . . . . . . . . . . . . . 2
TAMPER ALERT . . . . . . . . . . . . . . . . . . . . . . . . . 2
DESCRIPTION AND OPERATION
AUTO HEADLAMP RELAY . . . . . . . . . . . . . . . . . 3
BODY CONTROL MODULE . . . . . . . . . . . . . . . . 2
DOOR AJAR SWITCH
DOOR LOCK CYLINDER SWITCH . . . . . . . . . . . 2
HOOD SWITCH . . . . . . . . . . . . . . . . . . . . . . . . . 2
HORN RELAY . . . . . . . . . . . . . . . . . . . . . . . . . . 3
IMMOBILIZER RECEIVER . . . . . . . . . . . . . . . . . 4
IMMOBILIZER SYSTEM . . . . . . . . . . . . . . . . . . . 3
IMMOBILIZER TRANSMITTER . . . . . . . . . . . . . . 4
LIFTGATE AJAR SWITCH
LIFTGATE LOCK CYLINDER SWITCH . . . . . . . . 3
LIFTGLASS AJAR SWITCH
PARK LAMP RELAY . . . . . . . . . . . . . . . . . . . . . . 3
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.
NOTE: This group covers both Left-Hand Drive
(LHD) and Right-Hand Drive (RHD) versions of this
model. Whenever required and feasible, the RHD
versions of affected vehicle components have been
constructed as mirror-image of the LHD versions.
While most of the illustrations used in this group
represent only the LHD version, the diagnostic and
service procedures outlined can generally be
applied to either version. Exceptions to this rule
CONTENTS
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VEHICLE THEFT/SECURITY SYSTEMS
POWER-UP MODE . . . . . . . . . . . . . . . . . . . . . . 5
SET LAMP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
DIAGNOSIS AND TESTING
RELAYS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
VEHICLE THEFT SECURITY SYSTEM . . . . . . . . 5
SERVICE PROCEDURES
ENABLING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
VEHICLE IMMOBILIZER SYSTEM . . . . . . . . . . . 6
REMOVAL AND INSTALLATION
AUTO HEADLAMP AND PARK LAMP RELAYS . 10
DOOR AJAR SWITCH
DOOR LOCK CYLINDER SWITCH . . . . . . . . . . . 8
HOOD SWITCH . . . . . . . . . . . . . . . . . . . . . . . . . 7
HORN RELAY . . . . . . . . . . . . . . . . . . . . . . . . . . 11
IMMOBILIZER RECEIVER . . . . . . . . . . . . . . . . . 7
LIFTGATE AJAR SWITCH
LIFTGATE LOCK CYLINDER SWITCH . . . . . . . . 9
LIFTGLASS AJAR SWITCH
SET LAMP . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
have been clearly identified as LHD or RHD, if a
special illustration or procedure is required.
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
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