System Description

FRONT POWER SEAT CONTROL SYSTEM DESCRIPTION
- The power seat is standard equipment for the front seats.
- A memory system is provided for the front seats as standard equipment.

FUNCTION OF MAIN COMPONENT

The following functions are available.

MAIN COMPONENT FUNCTION CHART

Components	Function
Power seat motor (slide motor)	Receives signal from position control ECU, motor operates, and seat slides forward and rearward.
Power seat motor (reclining motor)	Receives signal from position control ECU, motor operates, and seat tilts and reclines.
Power seat motor (slide motor)	Receives signal from position control ECU, motor operates, and seat cushion slides.
Power seat motor (front vertical motor)	Receives signal from position control ECU, motor operates, and seat front vertical raises and lowers.
Power seat motor (lifter motor)	Receives signal from position control ECU, motor operates, and seat rear vertical raises and lowers.
Lumbar support adjuster motor	Receives signal from position control ECU, motor operates, and lumbar support can be adjusted.
Position control sensor (reclining, lifter, slide, front vertical control)	Is built into each front seat adjuster and sends seat position data to position control ECU so that it can detect seat positions at all times.
Front power seat switch (reclining, lifter, slide, front vertical)	Based on switches operated, seat adjuster signals are input into position control ECU and seat is adjusted accordingly.
Lumbar front power seat switch	Based on switches operated, seat adjuster signals are input into position control ECU and seat is adjusted accordingly.
Seat memory switch (set switch, memory switch)	When set switch and memory switch are pressed simultaneously, SET, 1 or 2 switch is input to multiplex network door ECU front and seat position is recorded. Then, when memory switch is pressed, SET, 1 or 2 switch is input to multiplex network door ECU front and seat position changes according to memory.

SYSTEM OPERATION

The front power seat's adjustment and position memory are shown in the chart below.

SEAT ADJUSTMENT FUNCTION CHART

Seat Adjustment Function	Driver	Passenger
Fore-and-Aft Slide	Power and memory	Power and memory
Reclining	Power and memory	Power and memory
Front Vertical Height	Power and memory	Power and memory
Rear Vertical	Power and memory	Power and memory
Lumbar Support	Power	Power
Headrest Fore-and-Aft	Manual	Manual

For the memory function, first, memory switch operation is transferred from the multiplex network door ECU front to the position control ECU via the multiplex communication line. Then, either the seat position is recorded in memory or a previously recorded seat position is recalled.