Toyota Corolla Cross Owners & Service Manuals

Toyota Corolla Cross: System Description

Toyota Corolla Cross (2022-2024) Service Manual / Power Source & Network / Networking / Lin Communication System / 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)

○

○

Front Power Window Regulator Motor Assembly (Driver Door)

-

-

Front Power Window Regulator Motor Assembly (Front Passenger Door)

-

-

Front Power Window Regulator Motor Assembly (Rear RH Door)

-

-

Front Power Window Regulator Motor Assembly (Rear LH Door)

-

-

Multiplex Network Master Switch Assembly

-

-

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

-

-
  • *1: w/ Sliding Roof System
Certification Bus Lines

Component

Master Control

LIN Communication DTC Output Function

Certification ECU (Smart Key ECU Assembly)

○

○

ID Code Box (Immobiliser Code ECU)

-

-

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    CAUTION / NOTICE / HINT HINT: Use the following procedure to troubleshoot the LIN communication system. *: Use the GTS. PROCEDURE 1. VEHICLE BROUGHT TO WORKSHOP

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    TERMINALS OF ECU CHECK POWER DISTRIBUTION BOX ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) *1 Power Distribution Box Assembly *2 Main Body

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    DIAGNOSIS SYSTEM DESCRIPTION The main body ECU (multiplex network body ECU) and certification ECU (smart key ECU assembly) control the LIN communication system. LIN communication system data and

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    DESCRIPTION If the entry lock function does not operate for the front passenger door only, but the entry unlock function operates, the request code is being transmitted properly from the for passenger door. In this case, there may be a problem related to the lock sensor (connection between the certi

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