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

• The engine switch is on (ACC) or on (IG).

  HINT:

  When the engine switch is turned on (ACC) or on (IG) and the key and certification ECU (smart key ECU assembly) are verified, the steering is unlocked.

• The engine switch is pressed.
• The brake pedal is depressed so that the engine can be started.
• 30 seconds have elapsed after opening and closing a door.

HINT:

• Key verification occurs when the code emitted from the key and the code stored by the certification ECU (smart key ECU assembly) are compared to check that they match.
• Certification ECU (smart key ECU assembly) verification occurs when the S code and L code are verified while the engine is being started or the engine switch is being pushed. The ID code box (immobiliser code ECU) uses the S code to determine whether the certification ECU (smart key ECU assembly) is authorized. The steering lock ECU (steering lock actuator or upper bracket assembly) uses the L code to determine whether the ID code box (immobiliser code ECU) is authorized.

• The engine switch is off.
• The shift lever is in P.
• A door is opened or a door lock operation (door lock, wireless door lock or key-linked lock operation*) is performed.

  HINT:

  *: This is the lock/unlock operation with the mechanical key.

Steering Lock does not Lock

DESCRIPTION The steering lock actuator or upper bracket assembly activates the steering lock motor and moves the lock bar into the steering column to lock the steering. When the steering lock is opera ...

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 c ...

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