Diesel Data: Automotive Repair

Description



Seat Adjustment Description
The electrically powered front seats are operated by four electric motors which control the seat base rear up/down, seat base front up/down, seat base forward/rearward and seat squab recline. The seats are operated by switches and controlled by the Body Control Unit (BCU). The seats operate when the ignition switch is in position I or II or for a predetermined period when the driver's door is open.

A electrically powered lumbar adjustment in each seat is operated by a single motorised pump and a solenoid located on the seat squab frame. The pump inflates a cushion in the seat squab and the solenoid operates a valve to deflate the cushion The seat cushion and seat squab also contain heater elements.

A seat switch pack is located on each side of the center console. Each switch pack comprises two non-latching switch levers. The horizontal lever has three, two position switches which control the seat cushion forward and rearward movement and also the seat cushion front and rear height adjustment. The vertical switch has two, two position switches which control the seat squab recline function and also the lumbar adjustment

The power supply to each seat switch pack is supplied from a power seat relay located on the underside of each seat frame The feed from the relay is protected by a fuse located in a satellite fuse block adjacent to the power seat relay. The fuse block also contains two additional fuses which protect the feeds to the lumbar pump and solenoid