Suzuki XL7 2007 Service Manual page 1886

7A-72 Heating, Ventilation and Air Conditioning:
Ambient
Temperature Humidity
Below 20%
42-46°C (106-
115°F)
Above 20%
47-49°C (116-
Below 30%
120°F)
Air Conditioning (A/C) System Performance Test (w/o C69)
This test measures the operating efficiency of the A/C system under the following conditions:
• The current ambient air temperature
• The current relative humidity
• The high side pressure of the A/C system
• The low side pressure of the A/C system
• The temperature of the air being discharged into the passenger compartment
Test Description
The numbers below refer to the step numbers on the diagnostic table.
1.
This step determines if the A/C system has at least the minimum refrigerant charge required to operate the system
without damage.
2.
This step measures the performance of the A/C system.
3.
This step is to allow for vehicle variations as well as high ambient temperatures.
Step
NOTE
• The ambient air temperature must be at least 16°C (60°F).
• Do not induce additional air flow across the front of the vehicle during the test.
• If you were sent here from a DTC diagnostic table, clear the DTC upon completion of this test.
1. Park the vehicle inside or in the shade.
2. Open the windows in order to ventilate the interior of
the vehicle.
3. If the A/C system was operating, allow the A/C
system to equalize for about 2 minutes.
4. Turn OFF the ignition.
1
5. Install the J 43600.
6. Record the ambient air temperature displayed on
the J 43600.
7. Record the low and high side STATIC pressure
readings.
Are both the low side and high side pressures within the
specified value?
Relative Low Side Service
Port Pressure
358-461 kPa (52-
67 psi)
351-454 kPa (51-
66 psi)
399-502 kPa (58-
73 psi)
Action
High Side Maximum Left
Service Port Center Discharge
Pressure Air Temperature
2177-2411 kPa
25°C (77°F)
(316-350 psi)
2163-2404 kPa
27°C (79°F)
(314-349 psi)
2439-2645 kPa
29°C (84°F)
(354-384 psi)
Values
More than
16°C (60°F) -
345 kPa (50
psi)
More than
24°C (75°F) -
Go to Step 2
483 kPa (70
psi)
More than
33°C (90°F) -
690 kPa (100
psi)
Maximum Left
Rear Discharge
Air Temperature
29°C (84°F)
30°C (86°F)
32°C (88°F)
Yes No
Go to "Leak
Testing"