Toyota Corolla Cross Owners & Service Manuals

Toyota Corolla Cross: System Description

SYSTEM DESCRIPTION

GENERAL

(a) The rear window defogger wire (back door glass) is attached to the inside of the rear window and defogs the window surface quickly when the rear window defogger switch is pressed. The indicator light on the switch illuminates while the system is operating. This system automatically turns off after approximately 15 minutes.

NOTICE:

If the auxiliary battery voltage becomes low, auxiliary battery load control will operate in order to ensure sufficient power is supplied to the power steering system. In this case, the window defogger system may not operate.

HINT:

The window defogger system is linked with the mirror heater function.

FUNCTION OF MAIN COMPONENT

Component

Outline

Rear Window Defogger Switch (Air Conditioning Control Assembly)

Sends signals to the air conditioning amplifier assembly to operate the window defogger system.

Air Conditioning Amplifier Assembly

Sends a window defogger system activation request signal to the power distribution box assembly.

Power Distribution Box Assembly

Receives a window defogger system activation request signal from the air conditioning amplifier assembly and supplies power to the rear window defogger wire (back door glass).

Rear Window Defogger Wire (Back Door Glass)

Receives power from the power distribution box assembly and heats the rear window using the rear window defogger wire (back door glass).

    READ NEXT:

     How To Proceed With Troubleshooting

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

     Operation Check

    OPERATION CHECK CHECK WINDOW DEFOGGER SYSTEM NOTICE: If the auxiliary battery voltage becomes low, auxiliary battery load control will operate in order to ensure sufficient power is supplied to the p

     Problem Symptoms Table

    PROBLEM SYMPTOMS TABLE NOTICE: If the auxiliary battery voltage becomes low, auxiliary battery load control will operate in order to ensure sufficient power is supplied to the power steering system. I

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     Reassembly

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