Circuit/System Description

WARNING: This page is about a different car, the 2017 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.

The seat memory control module supplies a reference voltage to each signal circuit of the driver seat adjuster switch. When the lumbar/bolster switches are pressed, the appropriate signal circuit from the seat memory control module is pulled low through the switch contacts indicating the seat lumbar/bolster support command. The control module then applies battery voltage through the control circuit to the seat lumbar/bolster pump. The pump energizes its internal inflate solenoid and the pump runs to inflate the bladder until the switch is released. When the lumbar/bolster switch is pressed to deflate the lumbar/bolster bladder, the signal circuit from the seat memory control module is pulled low indicating the deflate command. Battery voltage is applied through the deflate control circuit to the seat lumbar/bolster pump. The pump energizes its internal deflate solenoid and air is released from the bladder until the switch is released.