This is a method in which the trouble is located by using a manifold gauge set. Read the manifold gauge pressure when the
these conditions are established.
TIBURON(GK) > 2003 > G 2.7 V6 DOHC > Heating,Ventilation, Air Conditioning > General Information > Repair
procedures, TIBURON(GK) > 2003 > G 2.7 V6 DOHC > Heating,Ventilation, Air Conditioning > General Information >
Repair procedures
ON-VEHICLE INSPECTION
TEST CONDITIONS
• Temperature at the air inlet with the switch set at RECIRC is 30~35°C (86~95°F)
• Engine running at 1,500rpm
• Blower speed control knob on "4" position
• Temperature control knob on "COOL" position
It should be noted that the gauge indications may vary slightly due to ambient temperature conditions.
1. Normally functioning refrigeration system.
Gauge reading :
Low pressure side :
0.15~0.25 MPa (21.8~36.3 psi, 1.5~2.5 kgf/cm²)
High pressure side :
1.37~1.57 MPa (199~228 psi, 14~16 kgf/cm²)
2. Moisture present in refrigeration system.
Symptom seen in
refrigeration system
Probable cause
Diagnosis
Remedy
During operation, pressure
on low pressure side
sometimes become a
vacuum and sometime
normal
Moisture entered in
refrigeration system freezes
at expansion valve orifice
and temporarily stops cycle,
but normal state is restored
after a time when the ice
melts
• Drier in oversaturected
state
• Moisture in refrigeration
system freezes at
expansion valve orifice
and block circulation of
refrigerant
- Raplace drier
- Remove moisture in
cycle through repeatedly
evacuating air
- Charge proper amount of
new refrigerant
3. Insufficient cooling
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