Power Seat Switch: Description and Operation

The lumbar/bolster support switch performs three functions.
- It activates the front seat back pad adjusting pump.
- It incorporates a one way check valve for air passage to the front seat back pad adjuster. Once the front seat back pad adjuster is inflated and the lumbar/bolster support switch is left to its normal mode, the one-way check valve closes and prevents air in the front seat back pad adjuster from leaking out.
- In the deflate mode, it opens the one-way check valve and allows the air to leak out and deflate the front seat back pad adjuster. In this mode the front seat back pad adjusting pump does not operate.