Suzuki Grand Vitara 2011 Manual page 1554

7B-29 Air Conditioning System:
Thermometer at center duct
Condition
Crossing point is higher
than acceptable range
("E" area)
Crossing point is lower
than acceptable range
("F" area)
NOTE
If ambient temperature is within 30 °C (86 °F), it is possible to diagnose A/C system in detail referring
to the following table.
[C]
F C
80.6 27
78.8 26
77.0 25
75.2 24
73.4 23
71.6 22
69.8 21
68.0 20
66.2 19
64.4 18
62.6 17
60.8 16
59.0 15
57.2 14
55.4 13
53.6 12
51.8 11
50.0 10
48.2 9
46.4 8
44.6 7
25
77
Temp. near Air Inlet of HVAC unit
[A]: M16 engine model
[B]: J20 engine model
[C]: F9Q engine model
Possible Cause
Insufficient or excessive charge of refrigerant Check refrigerant pressure.
Dirty or bent A/C evaporator fins
Air leakage from cooling (heater) unit or air
duct
Malfunctioning, switch over function of
damper in cooling (heater) unit
Compressor malfunction
Insufficient air volume from center duct
(Heater blower malfunction)
Compressor malfunction
%
70
"E"
30
"F"
30 35 C
86 95 F
I6JB0A720009-01
Clean or repair.
Repair or replace.
Repair or replace.
Check compressor.
Check blower motor and fan.
Check compressor.
Correction