Power Seat Memory Switch - Operation

OPERATION

When one of the two buttons of the memory seat switch 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 and driver side power rear view mirror motors. The programmed software in the MSM allows it to know where the seat and mirror are located in there designed travel by a pulse count generated from the hall effect sensors. This way, when a memory seat switch button is pressed, the MSM will power the seat adjuster motors and mirror 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 (Refer to Memory Seat (MSMD) - Diagnosis and Testing).

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