Toyota Prius 2010 Repair Manual page 32

Item
Cabin Temperature
(b) Function of Main Components
(1) Each component of the remote air conditioning system has the functions described in the table:
Function of Main Components
Component
Key (electrical
transmitter)
Certification ECU
Main body ECU
Power management
control ECU
A/C amplifier
Inverter with converter
assembly
Compressor with motor
assembly
6. EJECTOR CYCLE SYSTEM
(a) In the conventional refrigerant cycle, liquid refrigerant gas is sent into the evaporator using the expansion
valve, generating cold air. However, a rapid decrease in the refrigerant pressure forms swirls, causing energy
loss. In this ejector cycle, the energy loss caused by the cooler expansion valve is utilized by the operation of
the ejector that injects and expands a high-pressure refrigerant, thus improving energy consumption efficiency.
2010 Toyota Prius
Higher than air conditioning temperature set by user
Air conditioning (cooling) is necessary
Sends remote air conditioning system on/off signals to the certification ECU.
Receives a signal from the key (electrical transmitter) and sends a signal to the main
body ECU.
Locks all of the doors.
Checks that all of the doors are closed and locked.
Checks that the hood is closed.
When the remote air conditioning system starts, the main body ECU operates the
wireless door lock system.
Turns the vehicle power (12 V) on/off.
Checks the state of charge of the HV battery.
Starts/stops the HV system.
Controls the inverter with converter assembly.
Checks the power switch condition.
Checks if park (P) is selected.
Checks the brake pedal condition.
Permits/prohibits remote air conditioning system operation.
Judges whether the cooling function is operating during remote air conditioning
system operation.
Checks the operation of the air conditioning system based on signals from various
sensors.
Controls the air conditioning system.
Judges when to stop the remote air conditioning system.
Supplies DC power from the HV battery to the inverter of the compressor with
motor assembly.
Compresses refrigerant using power from the HV battery.
Condition
Outline
Repair Manual