Suzuki 2006 SX4, Service Manual

Page: 874 / 1478

7B-9 Air Conditioning System: Manual Type
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”.
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): 1240 – 1620 kPa (12.4 – 16.2 kgf/cm 2 )
Pressure on low pressure gauge (LO): 250 – 360 kPa (2.5 – 3.6 kgf/cm 2 )
High pressure gauge
[A]: Pressure of high pressure gauge [C]: Ambient temperature [E]: Acceptable range
[B]: Pressure of low pressure gauge [D]: Humidity
Condition Possible cause Correction
Pressure is higher than
acceptable range
(“A” area) Refrigerant overcharged Recharge.
Expansion valve frozen or clogged Check expansion valve.
Clogged refrigerant passage of high pressure side Clean or replace.
Condenser cooling fan malfunction (Insufficient
cooling of condenser)
Check condenser cooling fan.
Dirty or bent condenser fins (Insufficient cooling of
condenser) Clean or repair.
Compressor malfunction (Insufficient oil etc.) Check compressor.
Engine overheat Check engine cooling system
referring to “Engine Cooling Symptom
Diagnosis in Section 1F”.
22 312.9 2200
0
1
2
3
30
70
30
70
%
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
21 298.7 2100
20
14.2
28.4
42.7
56.9
71.1
85.3
99.5
113.8
128.0
142.2
151.4
170.6
184.9
199.1
213.3
227.5
241.7
256.0
270.2
284.4
100
200
300
400
500
600
700
800
900
1000
1100
1200
1300
1400
1500
1600
1700
1800
1900
2000
25 30 35
77 86 95
psi kPa kgf/cm
2
[C]
[B]
[A]
˚C
˚F
“A”
“B”
“C”
[E]
[E]
“D”
[D]
I6RW0C721004-02