Toyota Tundra Service Manual: System Description

SYSTEM DESCRIPTION

1. GENERAL

The defogger system's thin heater wires are attached to the rear window and defog the rear window surface quickly. The indicator light illuminates while the system is operating. The system automatically turns off after approximately 15 minutes.

2. FUNCTION OF MAIN COMPONENT

Component

Outline

Air conditioning control assembly (rear window defogger switch)

Located on air conditioning control assembly , detects rear window defogger switch operation and transmits signals to air conditioning amplifier through LIN communication line

Defogger relay

Receives rear window defogger activation request signals from air conditioning amplifier and supplies power to rear window defogger

Back window glass (defogger wire)

Receives power from defogger relay and heats back window glass (defogger wire)

3. DESCRIPTION

Function

Outline

Rear window defogger

  • Defogger relay receives rear window defogger activation request signals from air conditioning amplifier and defogs rear window surface
  • Receives power from defogger relay and heats back window glass (defogger wire)
    Rear Window Defogger System does not Operate

    System Diagram

    See More:

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    DESCRIPTION The No. 1 damper servo sub-assembly (air outlet servo motor) sends pulse signals to inform the air conditioning amplifier of the damper position. The air conditioning amplifier activates the motor (normal, reverse) based on the signals to move the air outlet damper to any position, which ...

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