Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: Initialization

Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual / Vehicle Interior / Seat / Rear Power Seat Control System(for Third Row) / Initialization

INITIALIZATION

1. INITIALIZATION (INITIAL POSITION CLEAR)

NOTICE:

It is necessary to perform initialization (initial position clear) if any of the following conditions are met.

  • The fold seat control ECU has been replaced with a used one.
  • The No. 2 seat cushion frame sub-assembly RH, No. 2 seat cushion frame sub-assembly LH, No. 2 seatback frame sub-assembly RH or No. 2 seatback frame sub-assembly LH has been removed and installed or replaced.

(a) Initialization (Initial Position Clear) Conditions

(1) All of the following conditions are met:

  • An initial position has been memorized.
  • No rear No. 2 power seat fold or return switches are being operated.
  • The back door is open.
  • The vehicle is stopped.
    • When any of the following conditions are met, the vehicle will be judged as stopped:
    • (1) The engine switch is off.
    • (2) The vehicle speed is below 5 km/h (3.1 mph) and the shift lever is in P.
    • (3) The vehicle speed is below 5 km/h (3.1 mph) and the brake pedal is depressed.
    • (4) The vehicle speed is below 5 km/h (3.1 mph) and the parking brake is applied.

(b) Perform Initialization (Initial Position Clear)

NOTICE:

If any of the following conditions are met while initialization (initial position clear) is being performed, initialization will be canceled and it will be necessary to perform the procedure again.

  • The fold switch of the fold seat switch assembly is not pushed 5 times within 10 seconds after the return switch of the No. 1 fold seat switch assembly is first pushed.
  • Any switch of the fold seat switch assembly other than the fold seat switch is pushed within 10 seconds after the return switch of the No. 1 fold seat switch assembly is first pushed.
  • The return switch of the No. 1 fold seat switch assembly is released within 10 seconds after it is first pushed.
  • The back door is closed within 10 seconds after the No. 1 fold seat switch assembly is first pushed.
  • The vehicle is judged as being driven.
    • When the engine switch is on (IG) and any of the following conditions are met, the vehicle will be judged as being driven:
    • (1) The vehicle speed is 5 km/h (3.1 mph) or more.
    • (2) The shift lever is in any position other than P, the brake pedal is not depressed and the parking brake is released.

(1) Push and hold the return switch of the No. 1 fold seat switch assembly and, within 10 seconds, operate the fold switch of the fold seat switch assembly 5 times.

(2) Continue holding the return switch of the No. 1 fold seat switch assembly until 10 seconds have elapsed and a buzzer sounds 3 times, indicating that the initial position has been cleared. A buzzer will then sound continuously.

(3) After the buzzer begins to sound, release the return switch of the No. 1 fold seat switch assembly.

HINT:

If the switch is pushed again, the buzzer will stop.

2. INITIALIZATION (INITIAL POSITION MEMORIZATION)

NOTICE:

It is necessary to perform initialization (initial position memorization) if any of the following conditions are met:

  • A fold seat control ECU has been replaced with a new one.
  • Initialization (initial position clear) has been performed.

(a) Initialization (Initial Position Memorization) Conditions

(1) All of the following conditions are met:

  • The initial position has not been memorized.
  • No rear No. 2 power seat fold or return switches are being operated.
  • The vehicle is stopped.
    • When any of the following conditions are met, the vehicle will be judged as stopped:
    • (1) The engine switch is off.
    • (2) The vehicle speed is below 5 km/h (3.1 mph) and the shift lever is in P.
    • (3) The vehicle speed is below 5 km/h (3.1 mph) and the brake pedal is depressed.
    • (4) The vehicle speed is below 5 km/h (3.1 mph) and the parking brake is applied.

(b) Perform Initialization (Initial Position Memorization)

NOTICE:

If any of the following conditions are met while initialization (initial position memorization) is being performed, the initial position will not be memorized and it will be necessary to perform the procedure again.

  • Before the buzzer sounds twice, the fold switch of the fold seat switch assembly is released.
  • Any rear No. 2 power seat switch other than the fold switch of the fold seat switch assembly is operated.
  • The vehicle is judged as being driven.
    • When the engine switch is on (IG) and any of the following conditions are met, the vehicle will be judged as being driven:
    • (1) The vehicle speed is 5 km/h (3.1 mph) or more.
    • (2) The shift lever is in any position other than P, the brake pedal is not depressed and the parking brake is released.

(1) Press and hold the fold switch of the fold seat switch assembly until the seatback and seat cushion stop operating.

(2) Check that a buzzer sounds twice after the seatback and cushion stop operating, indicating that the initial position has been memorized.

    Operation Check
    OPERATION CHECK 1. CHECK FOLD FUNCTION OPERATION (a) Operating Conditions. (1) All of the following conditions are met: Initialization (initial position memorization) has been completed. The back ...

    Problem Symptoms Table
    PROBLEM SYMPTOMS TABLE NOTICE: When the fold seat control ECU (RH/LH seat) is replaced , it is necessary to perform initialization. Click here HINT: Use the table below to help determine the caus ...

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