550BS–01
I31521
Sight Glass
55–12
–HEATER & AIR CONDITIONER REFRIGERANT
2327Author: Date:
2002 CAMRY REPAIR MANUAL (RM881U)
REFRIGERANT
ON–VEHICLE INSPECTION
1. INSPECT REFRIGERANT VOLUME
(a) Observe the sight glass on the cooler refrigerant liquid
pipe A.
Test conditions:
Running engine at 1,500 rpm
Blower speed control switch at ”HI”
A/C switch ON
Temperature control dial at ”MAX. COOL”
Fully open the doors
Item Symptom Amount of refrigerant Corrective Actions
1 Bubbles present Insufficient*
(1) Check for gas leakage and repair if nec-
essary
(2) Add refrigerant until bubbles disappear
2 No bubbles present None, insufficient or too much Refer 3 and 4
3
No temperature difference between com-
pressor inlet and outlet
Empty or nearly empty
(1) Check for gas leakage with gas leak de-
tector and repair if necessary
(2) Add refrigerant until bubbles disappear
4
Considerable temperature difference be-
tween compressor inlet and outlet.
Correct or too much Refer to 5 and 6
5
Immediately after air conditioning is turned
off, refrigerant clear
Too much
(1) Discharge refrigerant
(2) Remove air and supply proper amount or
purified refrigerant
6
Immediately after air conditioning is turned
off, refrigerant foams and then becomes
clear
Correct –
*: Bubbles in the sight glass with ambient temperatures higher than usual can be considered normal if cooling
is sufficient.
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