
Air conditioning System performance test
2015 Chevrolet Impala L4-2.5L
AIR CONDITIONING SYSTEM PERFORMANCE ON SITE TESTS
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 temperature of the air being discharged into the passenger compartment.
AC Cooling Test description:
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- This step determines if the A/C system has at least the minimum refrigerant charge required to operate the system without damage.
- This step measures the performance of the A/C system.
- This step is to allow for vehicle variations as well as high ambient temperatures.
Step | Action Values Yes No |
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Note:
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1 |
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More than 16 ?C(60?F)-345kPa(50psi) More than 24?C(75?F)-483 kPa (70psi) More than 33?C (90?F)-690 kPa(100psi) |
Go to step 2 | Go to leak testing. |
2 | Note: Record the relative humidity and the ambient air temperature at the time of the best.
4. Install thermometers in the left and right center panel air outlets. |
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4 | ||||
AC PERFORMANCE TEST TABLE.
Ambient Temperature |
Relative Humidity | Low Side Service Port Pressure | High Side Service Port Pressure | Maximum Left Center Discharge Air Temperature |
13-18?C (55-65?F) | 0-100% | 175-200 kPa (70-125 psi) | 500-850 kPa (70-125 psi) | 5?C(40?F) |
19-24?C (66-75?F) | Less than 40% | 175-240 kPa (25-35 psi) | 690-1100 kPa (100-160 psi) | 5?C(40?F) |
Greater than 40 % | 175-240 Kpa (25-35 psi) | 690-1100 kPa(100-160 psi) | 7?C (45?F) | |
25-29?C (76-85?F) | Less than 35% | 175-240 kPa(25-35 psi) | 1000-1300 kPa (145-190 psi) |
10?C (50?F) |
35-60% | 175-240 kPa(25-35 psi) | 1000-1370 kPa (145-195 psi) | 10?C (50?F) | |
Greater than 60% | 175-280 kPa (25-40 psi) | 1000-1340 kPa (145-200 psi) | 10?C (50?F) | |
30-35?C (86-95?F) | Less than 30 % | 175-280 kPa(25-40 psi) | 1240-1590 kPa(180-230 psi) | 13?C (55?F) |
30-50 % | 175-280 kPa(25-40 psi) | 1240-1620 kPa (180-235 psi) | 13?C (55?F) | |
Greater than 50 % | 175-280 kPa(25-40 psi) | 1240-1650 kPa (180-240 psi) | 13?C (55?F) | |
36-41?C (96-105?F) | Less than 20 % | 240-320 kPa(35-45 psi) | 1500-1860 kPa (215-270 psi) |
15?C (60?F) |
20-40 % | 240-320 kPa(35-45 psi) | 1500-1900 kPa (215-275 psi) | 15?C (60?F) | |
Greater than 40% | 240-320 kPa(35-45 psi) | 1500-1900 kPa (215-275 psi) |
15?C (60?F) | |
42-46?C (106-115?F) | Less than 20 % | 280-350 kPa (40-50 psi) | 1765-2100 kPa(255-305 psi) | 18?C (65?F) |
Greater than 20 % | 280-350 kPa (40-50 psi) | 1765-2100 kPa(255-305 psi) | 18?C (65?F) | |
47-49?C (116-120?F) | Below 30 % | 320-380 kPa (45-55 psi) | 2000-2240 kPa (290-325 psi) |
20?C (70?F) |