Lexus NX: System Description

SYSTEM DESCRIPTION

FRONT POWER SEAT CONTROL SYSTEM DESCRIPTION

  • The driver seat is equipped with slide, reclining, rear lifter, front vertical, and lumbar support adjustment functions.
  • The memory call function uses the key ID code of the key to memorize and recall the appropriate driving position for each individual who possesses a master key or sub key.

FUNCTION OF MAIN COMPONENT

Component

Function

Front power seat switch LH

Based on the switch operation, seat adjuster signals are input to the front power seat switch LH to adjust the seat accordingly.

Front seat adjuster assembly LH

Slide motor

Receives a signal from the front power seat switch LH and slides the seat forward and rearward.

Front vertical motor

Receives a signal from the front power seat switch LH and raises and lowers the front of the seat cushion.

Rear lifter motor

Receives a signal from the front power seat switch LH and raises and lowers the seat cushion.

Position sensor

Built into each motor and sends position data to the front power seat switch LH so that it can detect the position at all times.

Separate type front seatback spring assembly LH

Reclining motor

Receives a signal from the front power seat switch LH and tilts the seatback forward and rearward.

Lumbar support adjuster assembly LH

Receives a signal from the front lumbar power seat switch and operates the built-in motor to adjust the lumbar support.

Seat memory switch

If the seat memory SET switch is being pressed when one of the M1, M2 or M3 seat memory switches is pressed, or if one of the M1, M2 or M3 switches is pressed within 3 seconds of pressing the SET switch, the outer mirror control ECU assembly (for Driver Side) sends the signals so that the seat position can be stored.

Then, when a seat memory switch is pressed, a signal is sent to the outer mirror control ECU assembly (for Driver Side) and the seat position changes according to memory.

Front lumbar power seat switch

Operates the motor built into the lumbar support adjuster assembly according to switch operation.

SYSTEM OPERATION

The front power seat functions which can be operated with the power seat motors and memorized are shown below.

Seat Function

Driver Seat

Slide

Power and Memory

Reclining

Power and Memory

Front Vertical

Power and Memory

Rear lifter

Power and Memory

Lumbar Support adjustment

Power

The seat memory switch sends memory switch information to the outer mirror control ECU assembly (for Driver Side). Then the information is sent to the main body ECU (multiplex network body ECU) via CAN and then an instruction to memorize the seat position is sent to the front power seat switch LH via CAN. As a result, the seat position is memorized.

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