Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: System Description

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Power Source, Network / Networking / Lin Communication System(for Gasoline Model) / 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 (Driver Door)

-

-

Power Window Regulator Motor Assembly (Front Passenger Door)

-

-

Power Window Regulator Motor Assembly (Rear LH Door)

-

-

Power Window Regulator Motor Assembly (Rear RH Door)

-

-

Multiplex Network Master Switch Assembly

-

-

Sliding Roof ECU (Sliding Roof Drive Gear Assembly)*

-

-
  • *: w/ Sliding 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)

-

-
    Precaution

    System Diagram

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