Jeep Cherokee (XJ): General information
The Sentry Key Immobilizer System (SKIS) is
available factory-installed optional equipment for this
model. Following are some general descriptions of the
features and components of the SKIS. Refer to the
vehicle owner's manual for more information on the
use and operation of the SKIS. Refer to 8W-30 - Fuel/
Ignition System in Group 8W - Wiring Diagrams for
complete circuit descriptions and diagrams. The Sentry Key Immobilizer System (SKIS) is
designed to provide passive protection against unauthorized
vehicle use by preventing the engine from
operating while the system is armed. The primary
components of this system are the Sentry Key Immobilizer
Module (SKIM), the Sentry Key transponder,
the SKIS indicator lamp, and the Powertrain Control
Module (PCM).
The SKIM is installed on the steering column near
the ignition lock cylinder. The transponder is located
under the molded rubber cap on the head of the ignition
key. The SKIS indicator lamp is located in the
instrument cluster.
The SKIS includes two valid Sentry Key transponders
from the factory. If the customer wishes, additional noncoded
blank Sentry Keys are available. These blank
keys can be cut to match a valid ignition key, but the
engine will not start unless the key transponder is also
programmed to the vehicle using the Customer Learn
programming procedure or a DRBIIIt scan tool. The
SKIS will recognize no more than eight valid Sentry
Key transponders at any one time.
The SKIS performs a self-test each time the ignition
switch is turned to the On position, and will
store Diagnostic Trouble Codes (DTCs) if a system
malfunction is detected. The SKIS can be diagnosed,
and any stored DTC can be retrieved using a
DRBIIIt scan tool as described in the proper Diagnostic
Procedures manual.Introduction
Sentry key immobilizer system
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