seats LEXUS LS430 2003 Factory Repair Manual

COMMUNICATION
1.GENERAL
The climate control seat system creates cold or warm air to increase the comfort of seats that have
become hot or cold.
The air is heated or cooled by the Peltier element on the back of the seat cushion pad and seatback. The
air is then sent to the seat cushion and seatback with the fan installed under the seat. The fan is operated
by pressing the climate control seat switch.
The climate control seat switch has several modes that vary the quantity of air to be sent to the seat. There
are 7 modes in total: 3 cooled air modes, 3 heated air modes and ventilation mode.
HINT:
When the highest level for cooled air operates for 15 minutes, the quantity of air falls 1 level.
2.FUNCTION OF MAIN COMPONENT
Fig. 4: Main Component Function Table

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3.SYSTEM OPERATION
SenderReceiverSignalLine
Climate control ECUECMIdle-up signalBEAN (Door bus), CAN

Fig. 25: Vehicle Overview
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
Fig. 26: Front Seats

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Fig. 31: Front Seats
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Fig. 313: Removing Intake Valve Using SST
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
HINT:
Arrange the valves, compression springs, spring seats and spring retainers in the correct order.
3.REMOVE EXHAUST VALVE
a. Using SST, compress the compression spring and remove the 2 keepers.
SST 09202-70020 (09202-00010)

Fig. 314: Removing Compression Spring And Removing Keepers Using SST
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
b. Remove the spring retainer, compression spring, valve and spring seat.
HINT:
Arrange the valves, compression springs, spring seats and spring retainers in the correct order.
4.REMOVE VALVE STEM OIL O SEAL OR RING
a. Usin
g needle-nose pliers, remove the oil seal.

Fig. 350: Identifying Specification Clearance Using Reamer
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15.INSPECT INTAKE VALVE SEAT
a. Usin
g a 45° carbide cutter, resurface the valve seats. Remove only enough metal to clean the seats.

Fig. 353: Checking Seat Contact Surface (1 Of 2)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
If not, correct the intake valve seats as follows:
d. If the seating is too high on the valve face: Use 30° and 45° cutters to correct the seat.
e. If the seatin
g is too low on the valve face: Use 60° and 45° cutters to correct the seat.

Fig. 355: Cleaning Valve And Valve Seat
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
16.INSPECT EXHAUST VALVE SEAT
a. Using a 45° carbide cutter, resurface the valve seats. Remove only enough metal to clean the seats.

Fig. 357: Checking Valve Seating Position
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
If not, correct the exhaust valve seats as follows:
d. If the seating is too high on the valve face: Use 30° and 45° cutters to correct the seat.

Fig. 4: Communication Table
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
1.FRONT POWER SEAT CONTROL SYSTEM DESCRIPTION
The power seat is standard equipment for the front seats and optional equipment for the rear seats.
On the LS430, a memory system for the driver seat is provided as standard equipment.
2.FUNCTION OF MAIN COMPONENT
The following functions are available.
MAIN COMPONENT FUNCTION
ComponentsFunction
Seat slide motorReceives signal from driver seat ECU, motor operates, and driver side's
seat slides forward and rearward.
Seat reclining motorReceives signal from driver seat ECU, motor operates, and driver side's
seat reclines forward and rearward.
Seat cushion slide motorReceives signal from driver seat ECU, motor operates, and driver side's
seat cushion slides.
Seat front vertical motorReceives signal from driver seat ECU, motor operates, and driver side's
seat front vertical raises and lowers.
Seat rear vertical motorReceives signal from driver seat ECU, motor operates, and driver side's
seat rear vertical raises and lowers.
Seat lumbar support upper
motorReceives signal from driver seat ECU, motor operates, and driver side's
seat lumbar support upper can be adjusted.
Seat lumbar support lower
motorReceives signal from driver seat ECU, motor operates, and driver side's
seat lumbar support lower can be adjusted.
Seat headrest height motorReceives signal from driver seat ECU, motor operates, and driver side's