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 low current voltage to each signal circuit of the seat adjuster switch. When the lumbar forward switch is pressed to inflate the seat lumbar support, the seat lumbar forward signal circuit from the seat memory control module is pulled low through the switch contacts indicating the lumbar support inflate command. The seat memory control module then applies battery voltage through the lumbar forward control circuit and ground through the lumbar rearward control circuit to the seat lumbar support pump. The lumbar pump energizes its internal inflate solenoid and the pump runs to inflate the lumbar support bladder until the switch is released. When the lumbar rearward switch is pressed to deflate the lumbar support bladder, the lumbar rearward signal circuit from the seat memory control module is pulled low indicating the lumbar support deflate command. The seat memory control module then applies battery voltage through the lumbar rearward control circuit and ground through the lumbar forward control circuit to the seat lumbar support pump. The lumbar pump energizes its internal deflate solenoid and air is released from the lumbar bladder until the switch is released or the bladder is 100% deflated.