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