Audio Systems - Jeep 1997 Grand Cherokee Service Manual

ZG
GENERAL INFORMATION
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . 1
MEMORY SYSTEM
DESCRIPTION AND OPERATION
ANTENNA RELAY . . . . . . . . . . . . . . . . . . . . . . . 3
ANTENNA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
BODY CONTROL MODULE . . . . . . . . . . . . . . . . 2
IGNITION-OFF DRAW FUSE . . . . . . . . . . . . . . . 3
RADIO NOISE SUPPRESSION . . . . . . . . . . . . . . 4
RADIO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
REMOTE RADIO SWITCH . . . . . . . . . . . . . . . . . 2
SPEAKER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
DIAGNOSIS AND TESTING
ANTENNA RELAY . . . . . . . . . . . . . . . . . . . . . . . 9
ANTENNA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
GENERAL INFORMATION
INTRODUCTION
Following are general descriptions of the major
components used in both the standard and optional
factory-installed audio systems. Refer to 8W-47 Audio
System in Group 8W - Wiring Diagrams for complete
circuit descriptions and diagrams.
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.
MEMORY SYSTEM
An electronic memory system is an available option
on this model. The memory system is able to store
and recall the driver side power seat positions
(including power lumbar and recliner positions), and
both outside power mirror positions for two drivers.
For vehicles with a radio connected to the Chrysler
Collision Detection (CCD) data bus network, the
memory system is also able to store and recall ten
radio station presets (including last station tuned) for
two drivers. The memory system will automatically

AUDIO SYSTEMS

. . . . . . . . . . . . . . . . . . . . . . 1
CONTENTS
page
AUDIO SYSTEM
RADIO FREQUENCY INTERFERENCE
RADIO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
REMOTE RADIO SWITCH . . . . . . . . . . . . . . . . . 6
SPEAKER
SERVICE PROCEDURES
ANTITHEFT SECURITY CODE . . . . . . . . . . . . . 10
REMOVAL AND INSTALLATION
AMPLIFIER . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
ANTENNA RELAY
ANTENNA . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
RADIO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
REMOTE RADIO SWITCH . . . . . . . . . . . . . . . . 11
SOUND BAR . . . . . . . . . . . . . . . . . . . . . . . . . . 14
SPEAKER
return to all of these settings when the correspond-
ing button (Driver 1 or 2) of the memory switch on
the driver side front door trim panel is depressed, or
when the doors are unlocked using the corresponding
(Driver 1 or 2) Remote Keyless Entry (RKE) trans-
mitter.
The Driver Door Module (DDM) receives hard-
wired input from the memory set/select switch on the
driver side front door trim panel. The DDM also
receives messages on the CCD data bus from the
RKE receiver in the Passenger Door Module (PDM)
for the memory select function. The DDM processes
these inputs and sends messages to the PDM, the
Memory Seat Module (MSM), and the radio (if CCD
data bus capable) on the CCD data bus for memory
recall.
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.
This group covers only the conventional diagnostic
procedures for the audio system components. For
diagnosis of the memory system, use of a DRB scan
tool and the proper Body Diagnostic Procedures man-
ual are recommended. For additional information on
the features and functions of the memory system,
refer to the vehicle owner's manual.
AUDIO SYSTEMS
. . . . . . . . . . . . . . . . . . . . . . . . 4
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
. . . . . . . . . . . . . . . . . . . . . . 17
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
8F - 1
page
. . . . . . 10