LUMBAR SUPPORT SYSTEM: System Description

WARNING: This page is about a different car, the 2013 Infiniti M56 and 2013 Infiniti M37. However, it is still accessible from the selected car via links, so may be relevant.

Lumbar support can operate regardless of the ignition switch position because, power supply is always supplied to lumber support switch.
While operating the lumbar support switch, lumbar support motor operates which allows forward and backward operation of seatback support.