Lexus NX: System Description

SYSTEM DESCRIPTION

REAR POWER SEAT CONTROL SYSTEM DESCRIPTION

  • This system has the following functions: reclining, folding and return, and jam protection.
  • Both the left and right seats are equipped with this system. Each system operates independently.

FUNCTIONS OF MAIN COMPONENTS

Component

Function

Rear Seatback Frame Sub-assembly (Reclining Motor, Fold Motor, Seatback Position Sensor)

The fold seat control ECU provides the voltage that is used to operate the reclining motor. The reclining motor reclines and returns the seatback of the rear (a Hall-type position sensor is installed in the fold motor to detect the seatback position).

Rear Power Seat Switch

  • Sends a seatback angle adjustment signal to the fold seat control ECU when this switch is operated. The seatback angle is adjusted based on this signal.
  • Sends a rear folding or return operation signal to the fold seat control ECU when this switch is operated. The rear is folded or returned to the original position based on this signal.

Fold Seat Switch

Sends a rear folding or return operation signal to the fold seat control ECU when this switch is operated. The rear is folded or returned to the original position based on this signal.

Fold Seat Control ECU

This ECU receives signals from each operation switch and drives the motor to perform storage, return and reclining of the seat. When the conditions required for operation are not fulfilled or when the system detects that something is interfering with the movement of the seat, this ECU sounds an internal alarm.

READ NEXT:

 How To Proceed With Troubleshooting

CAUTION / NOTICE / HINT HINT: Use the following procedures to troubleshoot the rear power seat control system. PROCEDURE 1. VEHICLE BROUGHT TO WORKSHOP NEXT 2. CUSTOMER

 Operation Check

OPERATION CHECK CHECK BASIC FUNCTION (a) Operate the rear power seat switch, No. 1 fold seat switch assembly and No. 2 fold seat switch assembly and check that each switch function operates normally.

 Initialization

INITIALIZATION INITIALIZE (INITIAL POSITION MEMORIZATION) NOTICE: Perform initialization (initial position memorization) in the following situations. When replacing the fold seat control ECU with a

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 Portable Player cannot be Connected Manually/Automatically

CAUTION / NOTICE / HINT HINT: Some versions of "Bluetooth" compatible audio players may not function properly, or the functions may be limited using the radio receiver assembly, even if the portable audio player itself can play files. Click here PROCEDURE 1. CHECK CONNECTED DEVICE SETTINGS

 Installation

INSTALLATION PROCEDURE 1. INSTALL MULTIPLEX NETWORK BODY ECU (MAIN BODY ECU) NOTICE: Make sure that no foreign matter gets on the connecting surfaces. Do not touch the ECU connector. (a) Insert the multiplex network body ECU (main body ECU) up to the position where it contacts the housing si

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