Toyota Corolla Cross Owners & Service Manuals

Toyota Corolla Cross: System Description

SYSTEM DESCRIPTION

LOAD OPERATION OUTPUT

(a) Load is turned on or off according to the operation signals and switch signals from each ECU.

Components

Power Distribution Box Assembly

Rear Window Defogger

Back-up Light

Dome Cut

Tail Light

Front Fog Light*1

Panel Illumination

Passenger Seat Buckle Switch Delegated Input

Passenger Seat Occupant Detection Sensor Delegated Input

Rear Seat RH Buckle Switch Delegated Input

Rear Seat CTR Buckle Switch Delegated Input

Rear Seat LH Buckle Switch Delegated Input

IGR Relay*2

+BA Relay

  • *1: w/ Front Fog Light
  • *2: w/o Smart Key System

SEMICONDUCTOR FUSE FUNCTION

(a) When a malfunction current occurs during load operation, the current is shut off before the electrical lines emit smoke, and then load is turned off. After the current is shut off, the off condition is maintained until the operation signals or switch signals turn off.

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    CAUTION / NOTICE / HINT HINT: Use these procedures to troubleshoot the power integration system. *: Use the GTS. PROCEDURE 1. VEHICLE BROUGHT TO WORKSHOP

     Utility

    UTILITY ALL READINESS (a) Power Distribution Box Assembly Body Electrical > Power Distribution Box > Utility Tester Display All Readiness

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    PROBLEM SYMPTOMS TABLE HINT: Use the table below to help determine the cause of the problem symptom. If multiple suspected areas are listed, the potential causes of the symptoms are listed in orde

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     IG Circuit Short to Ground or Open (B242E14)

    DESCRIPTION The headlight ECU sub-assembly operates using the power source voltage input from the IGR terminal and ECUB terminal. The IG terminal power source voltage is supplied by turning the IGR-NO.1 relay to ON. The headlight ECU sub-assembly receives ignition switch ON signals from the main b

     Door LIN Bus off (B232588)

    DESCRIPTION If the main body ECU (multiplex network body ECU) detects a communication error with an ECU connected to the door bus lines for 8 seconds or more, DTC B232588 will be stored. DTC No. Detection Item DTC Detection Condition Trouble Area

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