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 adjuster switch on vehicles equipped with the seat memory lumbar/bolster feature is a LIN Bus device. When the seat function select switch or the seat 4-way switch is pressed a serial data message is sent from the seat adjuster switch to the seat memory control module indicating the seat lumbar/bolster request. The seat memory control module then commands the seat bolster memory module, via LIN serial data messages, to perform the required pneumatic movements.

The seat bolster memory control module contains the electronic circuitry for executing the commanded pneumatic seat adjustments, air direction solenoids, pressure sensors for storing air bladder pressures, and outputs which supplies battery power to the external lumbar/bolster air pump motor when any of the air bladders require inflating.