Table 1: | A/C Performance Table - 4.3L, 4.8L. 5.3L, 6.0, and 8.1L Engines |
Table 2: | A/C Performance Table - 6.6L |
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 |
The numbers below refer to the step numbers on the diagnostic table.
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 air temperatures.
Step | Action | Values | Yes | No | ||||||||||||||||||||||||||
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Important:
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Are both the low and high side pressures within the specified value? |
| Go to Step 2 | Go to Leak Testing | |||||||||||||||||||||||||||
Important: Record the relative humidity and the ambient air temperature at the time of the test.
Important: Press the RESET button, before using the print function of the J 43600 .
Does all the data recorded fall within the specified ranges of the table below? | -- | Go to Step 8 | Go to Step 3 | |||||||||||||||||||||||||||
If the pressures and temperatures recorded do not fall within the specified ranges:
Does all the data recorded fall within the specified ranges of the table below? | -- | Go to Step 8 | Go to Step 4 | |||||||||||||||||||||||||||
4 | Do the high and low side pressures fall within the specified ranges but the panel outlet temperatures do not? | -- | Go to Step 5 | |||||||||||||||||||||||||||
5 | Is the low side pressure greater than the specified range, but the high side pressure within or less than the specified range? | -- | Go to Step 6 | |||||||||||||||||||||||||||
6 | Are the low and high side pressures both greater than the specified ranges? | -- | Go to Step 7 | |||||||||||||||||||||||||||
7 | Is the high side pressure greater than the specified range, but the low side pressure is within or less than the specified range? | -- | Go to Step 8 | |||||||||||||||||||||||||||
8 | Operate the system in order to verify the test results. Did you find the same results? | -- | System OK | Go to Symptoms - HVAC Systems - Manual in HVAC Systems - Manual or Symptoms - HVAC Systems - Automatic in HVAC Systems - Automatic |
Ambient Air Temperature | Relative Humidity | Service Port Pressure | Maximum Left Center Discharge Air Temperature | |
---|---|---|---|---|
Low Side | High Side | |||
13-16°C (55-65°F) | 0-100% | 150-246 kPa (22-36 psi) | 730-1190 kPa (106-173 psi) | 12°C (54°F) |
19-24°C (66-75°F) | Below 40% | 150-280 kPa (22-41 psi) | 900-1390 kPa (131-202 psi) | 14°C (57°F) |
Above 40% | 179-137 kPa (26-46 psi) | 990-1500 kPa (144-218 psi) | 16°C (61°F) | |
25-29°C (76-85°F) | Below 35% | 218-328 kPa (32-48 psi) | 1240-1640 kPa (180-238 psi) | 17°C (63°F) |
35-60% | 236-342 kPa (34-50 psi) | 1290-1680 kPa (187-244 psi) | 18°C (64°F) | |
Above 60% | 250-365 kPa (36-53 psi) | 1340-1760 kPa (194-255 psi) | 20°C (68°F) | |
30-35°C (86-95°F) | Below 30% | 266-386 kPa (39-56 psi) | 1500-1940 kPa (218-282 psi) | 21°C (70°F) |
30-50% | 280-397 kPa (41-58 psi) | 1540-1990 kPa (224-289 psi) | 22°C (72°F) | |
Above 50% | 300-430 kPa (44-62 psi) | 1600-2070 kPa (232-300 psi) | 24°C (75°F) | |
36-41°C (96-105°F) | Below 20% | 328-439 kPa (48-64 psi) | 1810-2240 kPa (263-325 psi) | 25°C (77°F) |
20-40% | 337-457 kPa (49-66 psi) | 1840-2290 kPa (267-332 psi) | 26°C (79°F) | |
Above 40% | 355-474 kPa (52-69 psi) | 1890-2340 kPa (274-340 psi) | 27°C (81°F) | |
42-46°C (106-115°F) | Below 20% | 391-491 kPa (57-71 psi) | 2130-2500 kPa (309-363 psi) | 29°C (84°F) |
Above 20% | 397-508 kPa (58-74 psi) | 2160-2550 kPa (313-370 psi) | 30°C (86°F) | |
47-49°C (116-120°F) | Below 30% | 451-552 kPa (65-80 psi) | 2420-2790 kPa (351-405 psi) | 33°C (92°F) |
Ambient Air Temperature | Relative Humidity | Service Port Pressure | Maximum Discharge Air Temperature | |
---|---|---|---|---|
Low Side | High Side | |||
13-18°C (55-65°F) | 0-100% | 150-279 kPa (22-41 psi) | 420-1140 kPa (61-165 psi) | 9°C (48°F) |
19-24°C (66-75°F) | Below 40% | 150-298 kPa (22-43 psi) | 531-1240 kPa (77-180 psi) | 11°C (52°F) |
Above 40% | 176-366 kPa (26-53 psi) | 760-1510 kPa (110-219 psi) | 14°C (57°F) | |
25-29°C (76-85°F) | Below 35% | 216-359 kPa (31-52 psi) | 990-1550 kPa (143-225 psi) | 15°C (59°F) |
35-50% | 250-382 kPa (36-55 psi) | 1130-1640 kPa (164-238 psi) | 16°C (61°F) | |
Above 50% | 275-430 kPa (40-62 psi) | 1230-1820 kPa (178-264 psi) | 18°C (64°F) | |
30-35°C (86-95°F) | Below 30% | 287-434 kPa (42-63 psi) | 1350-1930 kPa (195-280 psi) | 19°C (66°F) |
30-50% | 311-463 kPa (45-67 psi) | 1440-2040 kPa (209-296 psi) | 21°C (70°F) | |
Above 50% | 342-506 kPa (50-73 psi) | 1560-2190 kPa (226-318 psi) | 23°C (73°F) | |
36-41°C (96-105°F) | Below 20% | 366-506 kPa (53-73 psi) | 1750-2300 kPa (254-334 psi) | 23°C (73°F) |
20-40% | 382-531 kPa (55-77 psi) | 1800-2390 kPa (261-347 psi) | 25°C (77°F) | |
Above 40% | 409-557 kPa (59-81 psi) | 1900-2480 kPa (276-360 psi) | 27°C (81°F) | |
42-46°C (106-115°F) | Below 20% | 452-575 kPa (66-84 psi) | 2180-2660 kPa (316-386 psi) | 27°C (81°F) |
Above 20% | 465-599 kPa (68-87 psi) | 2220-2730 kPa (322-396 psi) | 29°C (84°F) | |
47-49°C (116-120°F) | Below 30% | 535-629 kPa (78-91 psi) | 2580-2900 kPa (375-421 psi) | 30°C (86°F) |