Toyota Prius 2010 Repair Manual page 385

Blower Motor Circuit
DESCRIPTION
The solar ventilation system and air conditioning system use the same blower motor for ventilation.
In order to be driven by each system, the blower motor switches between two different power sources using the
solar ventilation relay. When the power switch is off, power from the solar ventilation system is supplied to the
blower motor and when the power switch is in a mode other than off, power from the air conditioning system is
supplied to the blower motor.
The blower motor controls its operation and speed using the power and signals supplied by the solar ventilation
ECU when the power switch is off.
Changes its speed according to the amount of sunlight received by the moon roof glass assembly (solar panel).
WIRING DIAGRAM
INSPECTION PROCEDURE
NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
2010 Toyota Prius Repair Manual