Power Seat Systems - Jeep 1997 Grand Cherokee Service Manual

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GENERAL INFORMATION
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . 1
MEMORY SYSTEM
DESCRIPTION AND OPERATION
CIRCUIT BREAKER . . . . . . . . . . . . . . . . . . . . . . 3
MEMORY SEAT MODULE
POWER LUMBAR ADJUSTER AND MOTOR
POWER LUMBAR SWITCH . . . . . . . . . . . . . . . . 2
POWER RECLINER ADJUSTER AND MOTOR . . 2
POWER SEAT ADJUSTER AND MOTORS . . . . . 2
POWER SEAT SWITCH . . . . . . . . . . . . . . . . . . . 2
DIAGNOSIS AND TESTING
CIRCUIT BREAKER . . . . . . . . . . . . . . . . . . . . . . 3
GENERAL INFORMATION
INTRODUCTION
Six-way driver and passenger power front seats
with power recliners and power lumbar supports are
an available factory-installed option for this model.
The power seat system receives battery feed through
a fuse in the Power Distribution Center (PDC) and a
circuit breaker in the junction block at all times.
Following are general descriptions of the major
components in the power seat system. Refer to 8W-63
- Power Seat 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

POWER SEAT SYSTEMS

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CONTENTS
page
POWER LUMBAR ADJUSTER AND MOTOR
POWER LUMBAR SWITCH . . . . . . . . . . . . . . . . 3
POWER RECLINER ADJUSTER AND MOTOR . . 4
POWER SEAT ADJUSTER AND MOTORS . . . . . 3
POWER SEAT SWITCH . . . . . . . . . . . . . . . . . . . 3
POWER SEAT SYSTEM . . . . . . . . . . . . . . . . . . . 3
. . . 3 REMOVAL AND INSTALLATION
MEMORY SEAT MODULE . . . . . . . . . . . . . . . . . 7
POWER LUMBAR ADJUSTER AND MOTOR
POWER LUMBAR SWITCH . . . . . . . . . . . . . . . . 5
POWER RECLINER ADJUSTER AND MOTOR . . 6
POWER SEAT ADJUSTER AND MOTORS . . . . . 5
POWER SEAT SWITCH . . . . . . . . . . . . . . . . . . . 5
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
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 power seat system components.
For diagnosis of the memory system, use of a DRB
scan tool and the proper Body Diagnostic Procedures
manual are recommended. For additional information
on the features and functions of the memory system,
refer to the vehicle owner's manual.
POWER SEAT SYSTEMS 8R - 1
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