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

Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual / Steering / Power Assist Systems / Power Steering Ecu / Removal

REMOVAL

CAUTION / NOTICE / HINT

The necessary procedures (adjustment, calibration, initialization, or registration) that must be performed after parts are removed, installed, or replaced during the power steering ECU assembly removal/installation are shown below.

Necessary Procedure After Parts Removed/Installed/Replaced

Replacement Part or Procedure

Necessary Procedures

Effects / Inoperative when not performed

Link
*1: When performing learning using the Techstream.

Click here

Replacement of the power steering ECU assembly
  • Perform Torque Sensor Zero Point Calibration
  • Assist Map Writing
  • DTCs are output
  • Steering effort different between turning steering wheel left and right
  • EPS warning light illuminates

Replacement of the electric power steering column sub-assembly

Perform Torque Sensor Zero Point Calibration

Replacement of the steering lock actuator or upper bracket assembly

Perform code registration (Immobiliser system)
  • Wireless door lock control system
  • Smart access system with push-button start
  • Engine start function
  • Steering lock system
  • Telematics system

Removal/installation of the spiral cable with sensor sub-assembly
  • Steering angle neutral point (Initialize parking assist monitor system)
  • Steering angle setting

Parking assist monitor system

for Initialization

for Calibration

Steering angle neutral point (Initialize panoramic view monitor system)

Panoramic view monitor system

for Initialization

for Calibration

Steering angle neutral point (Initialize intelligent clearance sonar system)
  • Intelligent clearance sonar system
  • Intuitive parking assist system (w/ Intelligent Clearance Sonar System)

Disconnect cable from negative battery terminal

Memorize steering angle neutral point

Lane Control System

Pre-collision system

Intelligent clearance sonar system*1

Lighting system (w/ Automatic Headlight Beam Level Control System)

Parking assist monitor system

Panoramic view monitor system

Initialize back door lock

Power door lock control system

Reset back door close position

Power Back Door System (w/ Outside Door Control Switch)

PROCEDURE

1. REMOVE STEERING COLUMN ASSEMBLY

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2. REMOVE STEERING LOCK ACTUATOR OR UPPER BRACKET ASSEMBLY

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3. REMOVE POWER STEERING ECU ASSEMBLY

NOTICE:

  • Do not drop the power steering ECU assembly, strike it with tools or subject it to impacts.
  • If the power steering ECU assembly is subjected to an impact, replace it with a new one.
  • Do not pull the wire harness of the power steering ECU assembly.
  • Do not allow any moisture to come into contact with the power steering ECU assembly.
  • Do not loosen any bolts not mentioned in the procedure.
  • Do not allow any foreign matter to contaminate the power steering ECU assembly.

(a) Disconnect the connector.

(b) Remove the 2 bolts and power steering ECU assembly from the electric power steering column sub-assembly.

(c) Remove the electric power steering motor shaft damper from the electric power steering column sub-assembly.
    Installation
    INSTALLATION PROCEDURE 1. INSTALL POWER STEERING ECU ASSEMBLY NOTICE: Do not drop the power steering ECU assembly, strike it with tools or subject it to impacts. If the power steering ECU assembl ...

    Power Steering System
    ...

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