Circuit/System Description

The memory seat module (MSM) controls the seat, and steering column motors via half bridges that are divided into 2 groups that are connected to separate power rails internal to the module. When a power seat switch is pressed or when a memory recall is requested, each seat and steering column motor receives battery voltage and ground from the MSM via the motor control circuits. All motors are reversible, so the direction the motor rotates depends on which control circuit voltage is applied and which control circuit ground is applied. When the switch is operated in the opposite direction, the module reverses the polarity and applies voltage and ground to the opposite circuits to move the seat or steering column in the opposite direction.