HEATER, AIR CONDITIONER AND VENTILATION ± On-vehicle Service
55-8
ON-VEHICLE SERVICE
REFRIGERANT LEVEL TEST THROUGH
PERFORMANCE TEST
1. Park the vehicle to be tested in a place that is not in
direct sunlight.
2. Set conditions for outside air temperature as follows:
Dry-bulb temperature: 22
_C or more
Relative humidity:
60 to 100%
3. Close all of the doors with the windows fully closed.
4. Close the valves of the gauge manifold.
5. Connect the charging hose (red) to the gauge manifold
(high-pressure side) and the quick joint (for high-pressure)
to the end of the hose.
6. Connect the charging hose (blue) to the gauge manifold
(low-pressure side) and the quick joint (for low-pressure)
to the end of the hose.
7. Connect the quick joints to the appropriate service valves
of the vehicle.
Caution
To connect the quick joint, press section ªAº firmly
against the service valve until a click is heard.
When connecting, run your hand along the hose while
pressing the section ªAº to ensure that there are no
bends in the hose.
8. Start the engine.
9. Turn the blower switch to HI position.
10. Turn on the A/C switch, and set the A/C control to MAX.
COOL.
11. Set the air outlet changeover to FACE mode and the inside
air/outside air changeover to the inside air recirculation
mode.
12. Adjust the engine speed to 1,500 r/min.
13. Check if the outside air temperature and air temperature
blown out of FACE duct, and the outside air temperature
and refrigerant pressure (high-pressure and low-pressure
sides) are within the normal value range shown in the
graphs.
14. If the temperature and pressure are below the given range,
replenish the refrigerant. If above, drain the refrigerant.
(For charging, refer to P.55-10.)
NOTE
In the graph below, see the following:
[A]: Refrigerant pressure (high-pressure side)
[B]: Refrigerant pressure (low-pressure side)
Low-pressure
valve
High-pressure valve
Gauge manifold
Charging
hose (red)
Charging-
hose (blue)
Quick joint (for
low-pressure)
Quick joint
(for high-pressure)
Sleeve
A
High-pressure or-
low-pressure ser-
vice valve
Low-
pressure
service
valve
High-
pressure
service
valve
A/C system
15 20 25 30 (_C)35 40
Air temperature out of FACE duct (_C)
0
4
8
12
16
Normal
Outside air temperature
High-pressure side
Low-pressure side
15 20 25 30 (_C)35 40
490
981
1471
1961
2452
2942
0
kPa
kPa
98
196
294
392
490
588
0
686
Outside air temperature
[A]
[B]
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