SYSTEM DESCRIPTION GENERAL (a) The rear window defogger wire (back window 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
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Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Air Conditioning System(for Gasoline Model): Blower Motor Circuit
DESCRIPTION The blower motor with fan sub-assembly is operated by signals from the air conditioning amplifier assembly. Blower motor speed signals are transmitted in accordance with changes in the duty ratio. If the airflow volume is low or the blower speed cannot be changed, the following factors m ...