Suzuki GRAND VITARA Owner's Manual page 1134

7B-25 Air Conditioning System:
Manifold Gauge
Lo
M16 engine model
0.35 – 0.45
(3.5 – 4.5)
(50 – 64)
J20 engine model
0.33 – 0.45
(3.3 – 4.5)
(20 – 25)
(47 – 64)
(285 – 355)
0.45 – 0.55
(4.5 – 5.5)
(64 – 78)
Condition
MPa
(kg/cm 2 )
(psi)
Hi
High pressure reading on
both low and high pressure
sides.
High pressure reading on
2.0 – 2.5 both low and high pressure
sides.
Low pressure side tubing is
not cold when touched.
High pressure reading on
both low and high pressure
sides.
Large amount of frost or
dew on the low pressure
side tubing.
Possible Cause
Detail
Overcharged A/C
system.
Faulty condenser
cooling operation.
Faulty radiator fan
operation.
Presence of air in A/C
system. (Improperly
evacuated)
Faulty expansion valve.
Refrigerant flow is not
regulated properly.
Correction
Adjust refrigerant to
specified amount.
Clean condenser.
Inspect and repair
radiator fan.
Replace desiccant.
Inspect quantity of
compressor oil and
presence of
contaminants in oil.
Evacuate system and
recharge with fresh
refrigerant.
Replace expansion
valve.