Toyota Prius 2010 Repair Manual page 377

PROBLEM SYMPTOMS TABLE
HINT:
Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed,
the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the
table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as
necessary.
Inspect the fuses and relays related to this system before inspecting the suspected areas below.
Solar Ventilation System
Symptom
Solar ventilation system does not operate.
Solar ventilation system does not stop.
Inlets do not change to fresh air mode.
Outlets do not change to face mode.
Blower motor operates but stops after a short
while.
The blower motor operates by itself or the
motor speed changes arbitrarily.
Cabin is smelly or damp.
2010 Toyota Prius
Suspected Area
Conditions listed in System Operation Conditions
Reference Table have not been met
Solar ventilation ECU power source circuit
Solar ventilation switch circuit
IG signal circuit
Blower motor circuit
Solar ventilation ECU
Solar ventilation switch circuit
Blower motor circuit
Solar ventilation ECU
Air conditioning system
Solar ventilation switch circuit
A/C amplifier
Air conditioning system
Solar ventilation switch circuit
A/C amplifier
Conditions listed in System Operation Conditions
Reference Table have not been met
Solar ventilation ECU power source circuit
Blower motor circuit
Use simulation method to check
IG signal Circuit
Solar ventilation ECU
Conditions listed in System Operation Conditions
Reference Table have not been met
See
page
Repair Manual