MEMORY SEATS
TABLE OF CONTENTS
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DESCRIPTION AND OPERATION
MEMORY SEAT SYSTEM....................5
GLIDE FEATURE ..........................5
MEMORY SELECTOR SWITCH ...............5
DIAGNOSIS AND TESTING
GLIDE FEATURE ..........................6
SERVICE PROCEDURES
REMOTE KEYLESS ENTRY (RKE).............6
REMOVAL AND INSTALLATION
MEMORY HEATED SEAT/MIRROR MODULE
(MHSMM) ..............................7
MEMORY SELECTOR SWITCH ...............7
DESCRIPTION AND OPERATION
MEMORY SEAT SYSTEM
DESCRIPTION
The Memory Heated Seat and Mirror Module
(MHSMM) is located underneath the front of the
driver seat. It is mounted unto the bottom of the seat
by two screws. The connections to the system are
through a seat wiring harness that interfaces with
all of the components within the seat structure.
OPERATION
The MHSMM system allows the driver to adjust
the seat, both driver and passenger side mirrors, and
the radio stations to his/her preference and store
them in memory. There are two memory locations
available for two driver positions to be stored. The
module will also allow either of the two positions to
be recalled upon request.
The MHSMM reads all seat switch inputs and
operates the seat motors according to which switch is
being actuated. The MHSMM monitors position sens-
ing potentiometers (mounted on the motors) for seat
track positioning.
The MHSMM uses solid state drivers (electronic
switches) to control motor activation for both driver
and passenger side mirrors. Each mirror has vertical
and horizontal motors, that contain potentiometers
used to located the actual mirror position for recall
purposes. Normal electrical operation of the mirrors
is accomplished by actuating the power mirror switch
and doesn’t require the use of the module.
The MHSMM monitors the memory switches and
has the capability to store desired positions in mem-
ory in response to a valid input sequence. Refer to
Memory Selector Switches (1, 2, and S) and Remote
Keyless Entry (RKE). The memory heated seat and
mirror module will activate the seat and mirror
motors in response to a recall request from an indi-
vidual memory switch. The positioning of the motors
is determined by the potentiometer values stored in
memory.
The module operates the seat motors through
relays: four dedicated to track horizontal forward/
rearward, front vertical up/down, rear vertical
up/down, and recliner forward/rearward. A fifth relay
controls the direction of operation of these motors.
GLIDE FEATURE
DESCRIPTION
The MHSMM shall incorporate a seat glide fea-
ture. When exiting the vehicle and the ignition
switch is removed, the glide feature will then acti-
vate.
OPERATION
This feature will allow easier entry and exit to the
vehicle by moving the seat rearward a short distance
when the operator leaves the vehicle and returning
the seat to its original position when the vehicle
operator returns and turns the ignition ON or
extends their seat belt.
MEMORY SELECTOR SWITCH
DESCRIPTION
The memory selector switches are mounted on the
cushion cover side shield of the driver eat within
easy reach of the driver. They provide a means to set
and recall either of the two positions of seat and
recliner, and the side view mirror as chosen by the
driver.
OPERATION
The proper procedure of setting and recalling a
memory position using the memory switches is as fol-
lows:
(1) Adjust the seat, recliner and side view mirrors
to the desired position.
LH POWER SEAT SYSTEMS 8R - 5
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