Electric Driver Seat Adjustment - Memory Seats

The CJB supplies 3 power supplies to the DSM and one supply to the driver seat switchpack. The fused supplies provide power for the movement motors in addition to the driver seat switchpack. Power is permanently supplied to the DSM and the driver seat switchpack.

The driver seat switchpack is connected to the DSM by a LIN (local interconnect network) bus for the seat movement switches. Any selection for seat movement generates a message which is passed via the LIN to the DSM. The seat module processes the request and operates the applicable seat function as required using the power supplies from the CJB.

Each seat motor contains a Hall position sensor. The sensor sends a feedback signal to the DSM. The signal is used for memory store and memory recall functions.

The lumbar adjustment switch on the driver seat switchpack is wired direct to the lumbar pump and solenoids. The switch, when moved to the inflate position for either the upper or lower inflatable cushion cell, provides a power supply to the lumbar pump and simultaneously activates the applicable inflate solenoid valve. When the switch is released, the pump stops and the solenoid valve closes trapping the air in the inflatable cushion. When the switch is moved to the deflate position for either the upper or lower inflatable cushion cell, power is supplied to the applicable deflate solenoid valve which opens to allow the air in the cushion to escape. When the switch is released, the valve is closed and the remaining air in the cushion is retained.