Toyota Prius 2010 Repair Manual page 332

ON-VEHICLE INSPECTION
1. INSPECT REFRIGERANT VOLUME
2010 Toyota Prius
(a) Check the sight glass on the air conditioning tube and accessory.
(1) Prepare the vehicle according to the chart below.
Item
Vehicle door
Temperature setting
Blower speed
A/C
(2) Compare the sight glass to the following chart.
Item Symptom
1 Bubbles exist
2 No bubbles exist
No temperature
difference between
3
compressor inlet and
outlet
Considerable
temperature
4 difference between
compressor inlet and
outlet
Immediately after air
conditioning is turned
5
off, refrigerant
remains clear
Fully open
MAX COOL
HI
on
Amount of
Corrective Action
Refrigerant
1. Check for gas leaks
Insufficient* 2. Recharge with a
Empty,
insufficient, or Refer to 3 and 4
excessive
1. Check for gas leaks
2. Evacuate the AC
Empty or
nearly empty
Proper or
Refer to 5 and 6
excessive
1. Recover refrigerant
2. Evacuate the AC
Excessive
Condition
and repair if
necessary
proper amount of
refrigerant
and repair if
necessary
system and recharge
with a proper
amount of
refrigerant
system and recharge
with a proper
Repair Manual