Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual: System Diagram

Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual / Suspension / Steering Column / Steering Lock System / System Diagram

SYSTEM DIAGRAM

Circuit Description

Component

Outline

Steering Lock ECU (Steering Lock Actuator or Upper Bracket Assembly)
  • The steering is locked and unlocked by communicating with the certification ECU (smart key ECU assembly) and ID code box (immobiliser code ECU) via LIN communication.
  • When the following conditions are met, the steering can be unlocked.
    • The codes (L codes) of the ID code box (immobiliser code ECU) and steering lock match.
    • The codes (S codes) of the ID code box (immobiliser code ECU) and certification ECU (smart key ECU assembly) match.
    • The certification ECU (smart key ECU assembly) and key ID codes match.

Certification ECU (Smart Key ECU Assembly)
  • The ID code of the key the user is carrying is sent to the door control receiver.
  • The certification ECU (smart key ECU assembly) compares the key ID code it receives from the door control receiver with its own ID code. If they match, the certification ECU (smart key ECU assembly) permits the steering lock ECU (steering lock actuator or upper bracket assembly) to turn the power on, start the engine and unlock and lock the steering.
  • Outputs a command to supply power to the steering lock motor based on the power source mode, shift position and vehicle speed signal.

ID Code Box (Immobiliser Code ECU)

Receives immobiliser set and unset commands from the certification ECU (smart key ECU assembly) via LIN communication and sends them to the ECM.
    System Description
    SYSTEM DESCRIPTION UNLOCK OPERATION CONDITIONS FOR STEERING LOCK (a) When the following condition is met, the unlock operation is performed. The engine switch is on (ACC) or on (IG). HINT: When the ...

    Terminals Of Ecu
    TERMINALS OF ECU TERMINAL INSPECTION *a Component without harness connected (Steering Lock ECU (Steering Lock Actuator or Upper Bracket Assembly)) - - (a) Measure the voltage and resistan ...

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    Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual > Steering Lock System: System Diagram
    SYSTEM DIAGRAM Circuit Description Component Outline Steering Lock ECU (Steering Lock Actuator or Upper Bracket Assembly) The steering is locked and unlocked by communicating with the certification ECU (smart key ECU assembly) and ID code box (immobiliser code ECU) via LIN communicati ...

    Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual > Smart Access System With Push-button Start (for Entry Function): How To Proceed With Troubleshooting
    CAUTION / NOTICE / HINT HINT: Use these procedures to troubleshoot the smart access system with push-button start (for Entry Function). *: Use the Techstream. PROCEDURE 1. VEHICLE BROUGHT TO WORKSHOP NEXT 2. CUSTOMER PROBLEM ANALYSIS HINT: In troubleshoo ...

    Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual

    Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual

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