Suzuki GRAND VITARA XL-7 Owner's Manual page 36

9) 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 "PERFORMANCE DIAGNOSIS
TABLE".
Example :
Gauges should read as follows
when ambient temperature is 30 °C (86 °F)
Pressure on high pressure
gauge (HI) :
Pressure on high pressure
gauge (LO) :
NOTE:
Pressure registered on gauge varies with ambient tem-
perature. Therefore, use the graphs when determining if
pressures are normal or not.
10) Check inlet port temperature-to-outlet port temperature rela-
tionship using graph.
For example, if A/C evaporator inlet port temperature is 25
°C (77 °F) and center face air outlet temperature is 8 °C
(46.4 °F), their crossing point is within acceptable range as
shown in graph.
11) If crossing point is out of acceptable range, diagnose trouble
referring to "PERFORMANCE DIAGNOSIS TABLE".
12) Check that difference in temperature of center face air outlet
air and rear A/C air outlet air are within 5 °C (41 °F).
If the rear A/C air outlet air temperature is higher over 5 °C
(41 °F) than center face air outlet air temperature, check rear
A/C unit.
AIR CONDITIONING (OPTIONAL) 1B-11
1400 - 1750 kPa
2
14.0 - 17.5 kg/cm
199.1 - 248.9 psi
230 - 350 kPa
2
2.3 - 3.5 kg/cm
32.7 - 49.8 psi