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Old 08-24-2010, 11:14 AM
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Dodge Ram Forum Senior Member
Join Date: Jan 2010
Location: Burleson,TX
Age: 40
Posts: 490
Gender: Male
Vehicle: 2013 Ram R/T
Trim Level: R/T
Color: Gray
Engine: 2009-20?? 345ci (5.7L) Hemi V8 390hp 407lb/ft
Rep Power: 8
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The Memory Seat Module (MSM) receives battery current through a 50 amp fuse in the Totally Integrated Power Module (TIPM) so that the power seats remain operational, regardless of the ignition switch position. When the driver memory seat switch control knob is actuated, 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. The adjuster motor operates to move the power seat adjuster mechanism through its drive unit in the selected direction until the switch is released, or until the travel limit of the adjuster is reached.

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/mirror is 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 the seat adjuster/mirror motors 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 monitored 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” FOBIK.

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.
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