Seat Back: Description and Operation

PT Lumbar Assembly:

Some vehicles are equipped with a mechanical lumbar support mechanism. The only visible evidence of this option is the separate lumbar control lever that is located on the inboard seat cushion side shield. The lumbar adjuster and cable are concealed beneath the seat back trim cover and padding, where they are secured to the seat back frame.

The lumbar adjuster lever, located on the inboard side of each front seat attaches to a cable located inside the seat back. This cable/lever operates the lumbar adjuster mechanism. When the lumbar adjuster lever is moved up/down the attached cable is extended or retracted. The action of this cable compresses or relaxes a grid of flexible slats, located in the seat back. The more this grid is compressed, the more the slats bow outward against the center of the seat back padding, providing additional lumbar support.