Pacifica V6-3.8L VIN L (2005)
Power Seat Switch: Description and Operation
Lumbar Control Switch
CS Driver Seat Switch Assembly
The lumbar control switch is one of eight separate switches ganged together in driver seat switch assembly. The switch is located on the drivers front
door trim panel. The driver seat switch assembly can provide up to six resistive multiplexed inputs into the driver door module. The inputs can include
memory, heated seat, power seat, and foot pedal system requests. All inputs are hardwired resistive mux to the driver door module to decode axis
direction or seat heat level. Refer to Driver Door or Memory Heated Seat Adjustable Pedal Modules for additional information.
The power lumbar switch cannot be adjusted or repaired and, if faulty or damaged, the complete driver seat switch assembly must be replaced.
When the lumbar control switch is moved forward or rearward, a resistance signal is sent to the Driver Door Module via hard wired connections. The
driver door module then sends the request to the Memory Heated Seat Adjustable Pedal Module (MHSAPM) via the PCI data bus circuit. The
MHSAPM is responsible for controlling the 12v battery feed and ground path to the lumbar motor to control the seat back power lumbar mechanism
accordingly.