Suzuki GRAND VITARA Owner's Manual page 1130

7B-21 Air Conditioning System:
7) Wait for ten minutes to stabilize A/C operation.
8) Keep all windows, doors and engine food open.
9) With about 20 mm (0.8 in.) of dry bulb thermometer
(1) put right in front of center ventilation louver and a
wet and dry bulb thermometer (2) near air inlet (3) of
HVAC unit.
10) Check for each pressure of low side and high side if it is within shaded range of graph. If each gauge reading is out
of specified pressure, correct defective part referring to the table.
Low side and high side pressure example, gauges should read as follows when ambient temperature is 30
°C (86 °F)
M16 engine model
Pressure on high pressure gauge (HI): 1150 – 1410 kPa (11.5 – 14.1 kg/cm
Pressure on high pressure gauge (LO): 280 – 410 kPa (2.8 – 4.1 kg/cm
J20 engine model
Pressure on high pressure gauge (HI): 1300 – 1630 kPa (13.0 – 16.3 kg/cm
Pressure on high pressure gauge (LO): 250 – 370 kPa (2.5 – 3.7 kg/cm
NOTE
Pressure registered on gauge varies with ambient temperature. Therefore, use the graphs when
determining if pressures are normal or not.
[A]
psi kPa kg/cm
312.9 2200 22
298.7 2100 21
284.4 2000 20
270.2 1900 19
256.0 1800 18
241.7 1700 17
227.5 1600 16
213.3 1500 15
199.1 1400 14
184.9 1300 13
170.6 1200 12
151.4 1100 11
142.2 1000 10
128.0 900 9
113.8 800 8
99.5 700 7
85.3 600 6
71.1 500 5
56.9 400 4
42.7 300 3
28.4 200 2
14.2 100 1
0
2
"A"
"B"
"C"
"D"
25 30 35
77 86 95
Ambient Temperature
[A]: M16 engine model
[B]: J20 engine model
[B]
psi kPa
%
312.9 2200
298.7 2100
284.4
270.2
256.0
241.7
70
227.5
213.3
199.1
30
184.9
170.6
151.4
142.2
128.0
113.8
99.5
85.3
71.1
70
56.9
30
42.7
28.4
14.2
C
F
1
3
2 , 164 – 201 psi)
2 , 40 – 58 psi)
2 , 185 – 232 psi)
2 , 36 – 53 psi)
2
kg/cm
22
21
2000 20
1900 19
1800 18
1700 17
"A"
1600 16
1500 15
1400 14
1300 13
1200 12
"B"
1100 11
1000 10
900 9
800 8
700 7
600 6
"C"
500 5
400 4
300 3
200 2
100 1 "D"
0
25 30
77 86
Ambient Temperature
2
I5JB0A720011-01
%
70
30
70
30
35 C
95 F
I5JB0A720012-04