General Information - Jeep 1997 Grand Cherokee Service Manual

8E - 2 INSTRUMENT PANEL SYSTEMS

GENERAL INFORMATION

INTRODUCTION
This group is responsible for covering the vehicle
instrument panel. However, because the instrument
panel serves as the command center of the vehicle, it
is a very complex unit. The instrument panel is
designed to house the controls and monitors for stan-
dard and optional powertrains, climate control sys-
tems, audio systems,
systems, and many other comfort or convenience
items. It is also designed so that all of the controls
and monitors can be safely reached and viewed by
the vehicle operator, while still allowing relative ease
of access to these items for service.
Complete service information coverage for all of the
systems and components housed in the instrument
panel in this section of the service manual would not
be practical. It would result in a great deal of dupli-
cation and make this group too large for the informa-
tion to be easily accessed and used. Therefore, the
information found in this group has been limited as
follows:
• General Information - Covers non-electrical com-
ponents and features of the instrument panel that
are not related to other systems.
• Description and Operation - Covers gauges and
their sending units, warning lamps and their
switches, and instrument panel illumination lamps.
• Diagnosis and Testing - Covers gauges and their
sending units, warning lamps and their switches,
and instrument panel illumination lamps.
• Removal and Installation - Covers components
installed on or in the instrument panel that require
removal for diagnosis or service of instrument panel
components covered in this group.
For more information on components or systems
not covered above, refer to the proper group in this
manual. If you are uncertain as to the proper group,
refer to the Component and System Index at the
back of this manual. Refer to 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
have been clearly identified as LHD or RHD, if a
special illustration or procedure is required.
lighting systems, safety
INSTRUMENT PANEL
Modular instrument panel construction allows all
of the gauges and controls to be serviced from the
front of the panel. In addition, most of the instru-
ment panel wiring or heating and air conditioning
components can be accessed without complete instru-
ment panel removal. If necessary, the instrument
panel can be rolled-down and removed from the vehi-
cle as an assembly.
Removal of the switch pod bezels allows access to
most switches and the climate controls. Removal of
the instrument cluster bezel allows access to the
cluster assembly and the radio. Removal of the clus-
ter assembly allows access to the individual gauges,
illumination and indicator lamp bulbs, and most of
the instrument panel wiring.
Removal of the steering column cover/knee blocker
provides access to the steering column mounts, the
body control module, the gearshift interlock mecha-
nism, and additional instrument panel and steering
column wiring. Removal of the glove box module and
center bezel unit allows access to the Vehicle Infor-
mation Center (VIC),
(GDM), additional instrument panel wiring, the
in-vehicle temperature sensor, and other heating and
air conditioning components.
Removal of the instrument panel cowl top trim
panel allows access to the instrument panel speak-
ers, the solar sensor, and the automatic headlamp
light sensor/vehicle theft security system lamp.
Removal of the instrument panel top pad allows
access to the passenger side airbag module.
INSTRUMENT CLUSTER
One basic instrument cluster option is offered on
Grand Cherokee models. This cluster is an electrome-
chanical unit that utilizes integrated circuitry and
information carried on the Chrysler Collision Detec-
tion (CCD) data bus network for control of all gauges
and most indicator lamps. This cluster also incorpo-
rates a vacuum fluorescent display tube for the digi-
tal odometer and trip odometer display functions.
Some variations of the cluster exist due to optional
equipment and regulatory requirements.
The cluster includes the following analog gauges:
• Coolant temperature gauge
• Fuel gauge
• Oil pressure gauge
• Speedometer
• Tachometer
• Voltmeter.
This cluster includes provisions for the following
indicator lamps:
• Airbag indicator lamp
• Anti-lock brake system lamp
• Brake warning lamp
Graphic Display Module
ZG