Suzuki GRAND VITARA 2005 Service Manual page 516
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Also See for GRAND VITARA 2005:
- Owner's manual (1736 pages) ,
- Service manual (801 pages) ,
- Manual (35 pages)
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7B-11 Air Conditioning System:
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)
Pressure on high pressure gauge (HI): 1570 –
1970 kPa (15.7 – 19.7 kg/cm
Pressure on high pressure gauge (LO): 230 – 330
kPa (2.3 – 3.3 kg/cm
NOTE
Pressure registered on gauge varies with
ambient temperature. Therefore, use the
graphs when determining if pressures are
normal or not.
High pressure gauge
Condition
Pressure is higher than
acceptable range
("A" area)
Pressure is lower than
acceptable range
("B" area)
Low pressure gauge
Condition
Pressure is higher than
acceptable range
("C" area)
Pressure is lower than
acceptable range
("D" area)
2
, 223 – 280 psi)
2
, 33 – 47 psi)
Possible Cause
Refrigerant overcharged
Expansion valve frozen or clogged
Clogged refrigerant passage of high side
Radiator cooling fan malfunction (Insufficient
cooling of condenser)
Dirty or bent condenser fins (Insufficient
cooling of condenser)
Compressor malfunction (Insufficient oil etc.) Check compressor.
Engine overheat
Insufficient refrigerant (Insufficient charge or
leakage)
Expansion valve malfunction (valve opens too
wide)
Compressor malfunction (Insufficient
compression)
Possible Cause
Expansion valve malfunction (valve opens too
wide)
Compressor malfunction (Insufficient
compression)
Insufficient refrigerant (Insufficient charge or
leakage)
Expansion valve malfunction (valve opens too
narrow)
Clogged refrigerant passage (crashed pipe)
2
psi
kPa
kg/cm
327.1 2300
23
312.9 2200
22
298.7 2100
21
284.4
2000
20
"A"
270.2
1900
19
256.0
1800
18
241.7
1700
17
Acceptable range
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
"C"
56.9
400
4
42.7
300
3
28.4
200
2
14.2
100
1
0
25
77
Ambient Temperature
Correction
Recharge.
Check expansion valve.
Clean or replace.
Check radiator cooling fan.
Clean or repair.
Check engine cooling system referring to
"Engine Cooling Symptom Diagnosis: in
Section 1F".
Check for leakage, repair if necessary and
recharge.
Check expansion valve.
Check compressor.
Correction
Check expansion valve.
Check compressor.
Check for leakage, repair if necessary and
recharge.
Check expansion valve.
Repair or replace.
%
70
30
"B"
70
30
"D"
C
30
35
F
86
95
I5JB0B720006-02
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