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

SYSTEM DESCRIPTION

LIN COMMUNICATION SYSTEM DESCRIPTION

The LIN communication system is used for communication between the components in the tables below. If communication cannot be performed through LIN communication such as when there is an open or short in a communication line, the master control ECU of the relevant system will store a DTC. Refer to the table below about the communication bus lines and connected components.

HINT:

  • Each component has a fail-safe function which operates in the event of a malfunction to protect the system and allow communication between other components to continue.
  • In the following table, "○" indicates that the function applies, and "-" indicates that it does not.
Door Bus Lines

Component

Master Control

LIN Communication DTC Output Function

Main Body ECU (Multiplex Network Body ECU)

Power Window Regulator Motor Assembly (for Driver Door)

-

-

Power Window Regulator Motor Assembly (for Front Passenger Door)

-

-

Power Window Regulator Motor Assembly (for Rear LH Door)

-

-

Power Window Regulator Motor Assembly (for Rear RH Door)

-

-

Multiplex Network Master Switch Assembly

-

-

Sliding Roof ECU (Sliding Roof Drive Gear Sub-assembly)*1

-

-

Sliding Roof ECU (Sliding Roof Drive Gear Assembly)*2

-

-

Roof Sunshade ECU (Sliding Roof Drive Gear Assembly)*2

-

-

  • *1: w/ Sliding Roof System
  • *2: w/ Panoramic Moon Roof System
Certification Bus Lines

Component

Master Control

LIN Communication DTC Output Function

Certification ECU (Smart Key ECU Assembly)

Steering Lock ECU (Steering Lock Actuator or Upper Bracket Assembly)

-

-

ID Code Box (Immobiliser Code ECU)

-

-

    System Diagram
    SYSTEM DIAGRAM DOOR BUS LINES CERTIFICATION BUS LINES ...

    How To Proceed With Troubleshooting
    CAUTION / NOTICE / HINT HINT: Use the following procedure to troubleshoot the LIN communication system. *: Use the Techstream. PROCEDURE 1. VEHICLE BROUGHT TO WORKSHOP NEXT ...

    Other materials:

    Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Immobiliser System: Parts Location
    PARTS LOCATION ILLUSTRATION *1 ECM - - ILLUSTRATION *A for Lexus Enform Remote Compatible Type - - *1 ENGINE SWITCH *2 CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) *3 ID CODE BOX (IMMOBILISER CODE ECU) *4 STEERING LOCK ECU (STEERING LOCK ACTUATOR OR UPPER BRA ...

    Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Lighting System (w/ Automatic Headlight Beam Level Control System): Terminals Of Ecu
    TERMINALS OF ECU CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (a) Disconnect the instrument panel junction block assembly and main body ECU (multiplex network body ECU) connectors. (b) Measure the voltage and resistance according to the value(s) in t ...

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

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

    © 2025 Copyright www.lexusrx.net
    0.0106