Toyota Prius 2010 Repair Manual page 341

Turn the power switch off.
Secure good ventilation (the halogen leak detector may react to volatile gases which are not refrigerant,
such as evaporated gasoline and exhaust gas).
Repeat the test 2 or 3 times.
Make sure that there is some refrigerant remaining in the refrigeration system.
When the compressor is off: approx. 392 to 588 kPa (3.9 to 5.9 kgf/cm
(e) If a refrigerant leak is not detected from the drain hose, remove the blower motor control from the cooling
unit. Insert the halogen leak detector sensor into the unit and perform the test.
(f) Disconnect the pressure switch connector and leave it for approximately 20 minutes. Bring the halogen leak
detector close to the pressure switch and perform the test.
2010 Toyota Prius
(c) Using a halogen leak detector, inspect for refrigerant leaks from the
refrigerant lines.
Text in Illustration
*1 Inspect for Leak
*2 Halogen Leak Detector
(d) Bring the halogen leak detector close to the drain hose with the
detector's power off, and then turn the detector on.
Text in Illustration
*1 Halogen Leak Detector
*2 Drain Hose
After the blower motor has stopped, let the cooling unit stand for
more than 15 minutes.
Bring the halogen leak detector sensor under the drain hose.
When bringing the halogen leak detector close to the drain hose,
make sure that the halogen leak detector does not react to volatile
gases. If it is not possible to avoid interference from volatile gases,
the vehicle should be lifted up to allow testing.
2
, 57 to 85 psi)
Repair Manual