Power Lumbar Operation

The left and the right power lumbar systems each consist of the following components:
^ The seat/lock switch
^ The lumbar seat module

The seat/lock switch, located on the door trim panel of each door, directly controls a seat air pump through the lumbar seat module. The lumbar seat module, located under the seat, inflates or deflates an upper and a lower lumbar bladder, located in the seat back. The seat/lock switch has separate switches for upper and lower lumbar. Pushing the seat/lock switch to inflate actuates the seat air pump which fills one of the lumbar bladders. Pushing the seat/lock switch to deflate allows the bladder to deflate.