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

Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual / Vehicle Interior / Seat / Front Power Seat Control System (w/ Memory) / Registration

REGISTRATION

PROCEDURE

1. MEMORY CALL REGISTRATION

(a) Memory registration when not using the Techstream

NOTICE:

  • Do not bring 2 or more electrical key transmitter sub-assemblies into the cabin.
  • Do not press and hold the door control switch on the multiplex network master switch assembly for 3 seconds or more.

(1) Register the seat position to a seat memory switch LH (M1, M2, or M3 switch) in advance.

(2) Sit on the driver seat carrying only the electrical key transmitter sub-assembly to be registered to the vehicle.

(3) With the engine switch on (IG) and the shift lever in P, restore the memorized position to be registered.

(4) With the engine switch on (IG), the shift lever in P, the driver door closed, and a seat memory switch LH (M1, M2, or M3 switch) being pressed and held, press and hold the door control switch on the multiplex network master switch assembly until the buzzer answer-back function operates.

HINT:

  • The door control switch on the multiplex network master switch assembly can be pressed to either the lock or unlock side.
  • The buzzer sounds for 0.5 seconds when the registration is complete.
  • The buzzer sounds for 3 seconds when the registration fails.

(b) Memory registration when using the Techstream

(1) Connect the Techstream to the DLC3.

(2) Turn the engine switch on (IG).

(3) Turn the Techstream on.

(4) Enter the following menus: Body Electrical / Smart Access / Utility / Driver Information Registration.

Body Electrical > Smart Access > Utility

Tester Display

Driver Information Registration

(5) Proceed to the next step in accordance with the prompts on the Techstream screen.

(c) Memory deletion

NOTICE:

  • Do not bring 2 or more electrical key transmitter sub-assemblies into the cabin.
  • Do not press and hold the door control switch on the multiplex network master switch assembly for 3 seconds or more.

(1) Sit on the driver seat carrying only the electrical key transmitter sub-assembly to be deleted from the vehicle.

(2) With the engine switch on (IG), the shift lever in P, the driver door closed, and the SET seat memory switch LH being pressed and held, press and hold the door control switch on the multiplex network master switch assembly until the answerback by the buzzer is confirmed.

HINT:

  • The door control switch on the multiplex network master switch assembly can be pressed to either the lock or unlock side.
  • The buzzer sounds for 0.5 seconds when the registration is complete.
  • The buzzer sounds for 3 seconds when the registration fails.

2. INITIALIZATION OF SEAT ECU

NOTICE:

Initializing the position control ECU and switch assembly LH will clear the seat position memory.

HINT:

  • Make sure to initialize the position control ECU and switch assembly LH after replacing the seat assembly or any related parts.
  • Before initializing the seat ECU, make sure that the D/C CUT fuse is normal.
  • When any of the following conditions are met, the seat position Information in the seat ECU will be cleared.
    • The engine switch is turned off with any of the seat switches being operated and the D/C CUT fuse removed.
    • The engine switch is turned off within 1 second of any of the seat switches being operated with the D/C CUT fuse removed.
    • Power supplied to the position control ECU and switch assembly LH is cut while the seat is moving to the memorized position.

(a) Turn the engine switch on (IG).

(b) Operate the slide and vertical power seat switch knob to tilt the front of the power seat downward 3 times.

(c) Within 10 seconds of operating the slide and vertical power seat switch, simultaneously operate and hold the reclining power seat switch knob to recline the power seat and slide and vertical power seat switch knob to move the power seat upward until a buzzer sounds.

(d) Operate and hold the slide and vertical power seat switch knob to move the power seat to the foremost position or rearmost position. Continue holding the switch for 1 second after the seat has stopped.

(e) Operate and hold the slide and vertical power seat switch knob to move the power seat to the uppermost position or lowermost position. Continue holding the switch for 1 second after the seat has stopped.

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