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Suzuki SX4 Service Manual page 1003

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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 following table.
When diagnosing troubles of abnormal pressure on the low side and high side for each pressure more specifically,
refer to "Trouble Diagnosis for Abnormal Pressure: Manual Type".
NOTE
Pressure registered on gauge varies with ambient temperature. Therefore, use the graphs when
determining if pressures are normal or not.
Low side and high side pressure example, Gauges should read as follows when ambient temperature is 30
°C (86 °F)
Pressure on high pressure gauge (HI): 1130 – 1560 kPa (11.4 – 15.6 kgf/cm
Pressure on low pressure gauge (LO): 270 – 390 kPa (2.7 – 3.9 kgf/cm
[A]: Pressure of high pressure gauge
[B]: Pressure of low pressure gauge
High pressure gauge
Condition
Pressure is higher than
acceptable range
("A" area)
psi
kPa
kgf/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
[A]
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
[B]
56.9
400
4
42.7
300
3
28.4
200
2
14.2
100
1
0
25
77
Possible cause
Refrigerant overcharged
Expansion valve frozen or clogged
Clogged refrigerant passage of high pressure side Clean or replace.
Condenser cooling fan malfunction (Insufficient
cooling of condenser)
Dirty or bent condenser fins (Insufficient cooling of
condenser)
Compressor malfunction (Insufficient oil etc.)
Engine overheat
Air Conditioning System: Manual Type 7B-9
2
%
70
"A"
30
[E]
"B"
"C"
70
[E]
30
"D"
C
30
35
F
86
95
[C]
I6RW0D721001-01
[C]: Ambient temperature
[D]: Humidity
2
)
2
)
[D]
[E]: Acceptable range
Correction
Recharge.
Check expansion valve.
Check condenser cooling fan.
Clean or repair.
Check compressor.
Check engine cooling system
referring to "Engine Cooling Symptom
Diagnosis in Section 1F".

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