E50573
I22117
Condition: Periodically cools and then fails to cool
–HEATER & AIR CONDITIONER REFRIGERANT
55–13
2328Author: Date:
2002 CAMRY REPAIR MANUAL (RM881U)
2. INSPECT REFRIGERANT PRESSURE WITH MAN-
IFOLD GAUGE SET
(a) This is a method in witch the trouble is located by using
a manifold gauge set. Read the manifold gauge pressure
when the these conditions are established.
Test conditions:
Temperature at the air inlet with the switch set
at RECIRC is 30 – 35 °C (86 – 95 °F)
Engine running at 1,500 rpm
Blower speed control switch at ”HI” position
Temperature control dial at ”COOL” position
A/C switch ON
Fully open doors
(1) Normally functioning refrigeration system.
Gauge reading:
Low pressure side:
0.15 – 0.25 MPa (1.5 – 2.5 kgf/cm
2
)
High pressure side:
1.37 – 1.57 MPa (14 – 16 kgf/cm
2)
(2) Moisture present in refrigeration system.
Symptom Probable cause Diagnosis Remedy
During operation, pressure on low
pressure side sometimes become
a vacuum and sometime normal
Moisture in refrigerating system
freezes at expansion valve orifice
causing a temporary stop of cycle,
however, when it melts, normal
state is restored.
Drier in oversaturected state
Moisture in refrigerating system
freezes at expansion valve orifice
and blocks circulation of refriger-
ant
(1) Replace condenser
(2) Remove moisture in cycle by
repeatedly evacuating air
(3) Supply proper amount of new
refrigerant
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