Electric Driver Seat Adjustment - Non-Memory Seats

The CJB supplies 3 power supplies to the driver seat switchpack. The fused supplies provide power for the seat height and backrest recline, the seat forward/rearward and seat tilt and the lumbar adjustment respectively. The CJB only provides the power to the driver seat switchpack when the ignition is on (power mode 6).

For the seat movement motors, when the applicable switch is operated, the power is supplied to the applicable side of the motor and the ground path is completed to operate the motor in the required direction. To move the motor in the opposite direction the polarity is reversed.

For the lumbar adjustment, when the switch is operated in the inflate position, power is supplied to the pump motor to inflate the lumbar support. When the switch is operated in the opposite direction, the power energizes a solenoid which in turn opens a valve to deflate the lumbar support.