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Power Seat Memory Switch - Operation





OPERATION

When one of the two memory seat switches is pressed, the Memory Seat Module (MSM) receives the memory set/position switch input over the Controller Area Network (CAN) bus. The MSM also receives hard wired input from the hall effect sensors, mounted on each of the driver power seat adjuster motors, driver side power rear view mirror motors and the power adjustable steering column motors. The programmed software in the MSM allows it to know where the seat, mirror and column are located in there designed travel by a pulse count generated from the hall effect sensors. This way, when a memory seat switch is pressed, the MSM will power the seat adjuster motors, mirror adjuster motors and steering column adjuster motors until the correct preset locations are achieved. The MSM will prevent the seat memory recall function from being initiated whenever the transmission gear selector lever is not in the Park position, or if the vehicle is moving. These inputs are monitored over the CAN bus by the MSM.

The memory seat switch is diagnosed using a scan tool.

The memory seat switch cannot be adjusted or repaired and must be replaced if damaged or inoperative.