Chrysler 300/300 Touring/300C, Dodge Magnum. Manual - part 396
MODULE-SEAT MEMORY
DESCRIPTION
NOTE: The scan tool standardization process
must be performed on the Memory Seat Module
(MSM) any time a new module is installed or the
existing module is reflashed.
The Memory Seat Module (MSM) is located under-
neath the driver seat, towards the front and on the
outboard side. It is used in conjunction with the other
modules in the memory system to recall the driver
seat to one of two preset seat positions (horizontal,
vertical, and recliner). The switch for the memory seat
programming and selection mounts on the driver door
trim panel. The memory system is able to store and
recall all driver side power seat positions, outside mir-
ror positions, power tilt/telescopic steering column
positions and power adjustable pedal position. The
system can be set for two different drivers. On vehi-
cles with a factory installed radio connected to the
Controller Area Network (CAN) data bus network, the memory system is also able to store and recall up to twelve
radio station presets (six AM and six FM), also for two drivers. The memory system will also store and recall the last
station listened to for each driver, even if it is not one of the twelve preset stations.
The memory system will automatically recall all of these settings when a button of the memory switch is depressed,
or when the doors are unlocked using the Remote Keyless Entry (RKE) transmitter (if the “RKE Linked to Memory”
feature is enabled). If the vehicle has more than two drivers the RKE transmitter recall of memory features can be
disabled. This is a customer programmable feature of the Electronic Vehicle Information Center (EVIC).
OPERATION
The Memory Seat Module (MSM) receives battery current through a 25 amp circuit breaker in the Power Distribution
Center (PDC) so that the memory system remains operational, regardless of the ignition switch position. When the
driver memory switch button is pushed, a resistance signal is sent to the MSM via the Controller Area Network
(CAN) bus circuit. The MSM is responsible for the 12v battery feed and ground path to the power seat adjuster
motor and other memory system components.
The MSM receives memory set/position switch input through the CAN bus circuit. The MSM also receives hard
wired input from the hall effect sensors, mounted on each of the driver power seat adjuster motors and the driver
side view mirror motor. The programmed software in the module allows it to know where the seat, adjustable ped-
als, and steering column tilt/telescope are located in its designed travel by a pulse count generated from the hall
effect sensors. This way, when the memory switch is depressed the module will power these components until the
correct preset location is achieved. The module will prevent the seat memory recall function from being initiated, if
the transmission gear selector lever is not in the Park position, or if the vehicle is moving. These inputs are mon-
itored over the Controller Area Network (CAN) bus circuit by the MSM.
A memory setting is saved by pressing the “set” button, then pressing either the memory “1” or “2” button within 5
seconds of pressing the “set” button.
A memory setting is recalled by pressing either the memory “1” or “2” button, or by pressing the unlock button on
a “linked” Remote Keyless Entry (RKE) transmitter.
For driver safety, memorized settings can not be recalled if the transmission is in a position other than Park or the
seat belt is latched.
The MSM performs the following functions:
•
Positions the driver power seat (vertical, horizontal, and recliner positions).
•
Positions the power adjustable pedals.
•
Positions the power tilt/telescopic steering column positions.
8E - 274
ELECTRONIC CONTROL MODULES - SERVICE INFORMATION
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