Test Description
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.
- 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 | Action | Values | Yes | No |
|---|
| IMPORTANT: 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. Open the windows in order to ventilate the interior of the vehicle. If the A/C system was operating, allow the A/C system to equalize for about 5 minutes. Turn OFF the ignition. Install the J 43600 ACR 2000 Air Conditioning Service Center. See Special Tools . Record the ambient air temperature displayed on the J 43600 . See Special Tools . Record the low and high side STATIC pressure readings. Are both the low side and high side pressures above the specified value? | More than 16°C (60°F) - 345 kPa (50 psi) More than 24°C (75°F) - 483 kPa (70 psi) More than 33°C (90°F) - 690 kPa (100 psi) | Go to Step 2 | Go to Leak Testing |
| 2 | IMPORTANT: Record the relative humidity and the ambient air temperature at the time of the test. Close the vehicle doors and windows. Open the driver's door window 12.7-15.2 cm (5-6 inches). Select the following HVAC control settings: The A/C is ON The maximum blower speed The maximum blower speed selected on the auxiliary blower controls Recirculation mode The Face mode The coldest temperature setting Passenger setting is OFF All A/C outlets are OPEN Install the temperature probes of the J 43600 in the left and right center A/C air outlets. See Special Tools . Apply the parking brake. Place the transaxle/transmission in the following position: PARK. Start the engine. Operate the A/C system for 5 minutes. Inspect A/C components for the following conditions: Abnormal frost areas Unusual noises IMPORTANT: Make sure that the compressor is engaged when taking the data. Press the RESET button, before using the print function of the J 43600 . See Special Tools . Print the following information: The outlet air temperatures The low-side pressure The high-side pressure Compare the low and high side pressures and the output temperatures to the A/C Performance Table. Does all the data recorded fall within the specified ranges of the A/C Performance Table? | | Go to Step 8 | Go to Step 3 |
| 3 | If the pressures and temperatures recorded do not fall within the specified ranges of the A/C Performance Table: Continue to operate the A/C system for an additional 5 minutes. RESET the J 43600 and record the pressures and temperatures again. See Special Tools . Compare the low and high side pressures and the output temperature to the A/C Performance Table. Does all the data recorded fall within the specified ranges? | | Go to Step 8 | Go to Step 4 |
| 4 | Do the high and low side pressures fall within the specified ranges, but the outlet temperatures do not? | | Go to Air Conditioning (A/C) Diagnostics - Pressure Zone A | 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 Air Conditioning (A/C) Diagnostics - Pressure Zone B | Go to Step 6 |
| 6 | Are the low and high side pressures both greater than the specified ranges? | | Go to Air Conditioning (A/C) Diagnostics - Pressure Zone C | Go to Step 7 |
| 7 | Is the high side pressure greater than or within the specified range, but the low side pressure is less than the specified range? | | Go to Air Conditioning (A/C) Diagnostics - Pressure Zone D | 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 - Automatic in HVAC Systems-Automatic |
| IMPORTANT |
|---|
| 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. |
| IMPORTANT |
|---|
| Record the relative humidity and the ambient air temperature at the time of the test. |
| IMPORTANT |
|---|
| Make sure that the compressor is engaged when taking the data. Press the RESET button, before using the print function of the J 43600 . See Special Tools . |
Air Conditioning (A/C) System Performance Test (LH2 w/ Standard Cooling)
| Ambient Temperature | Relative Humidity | Low Side Service Port Pressure | High Side Service Port Pressure | Maximum Left Center Discharge Air Temperature | Maximum Left Side Rear Discharge Air Temperature |
|---|
| 13-18°C (55-65°F) | 0-100% | 170-234 kPa (25-34 psi) | 1101-1411 kPa (160-205 psi) | 8°C (46°F) | 11°C (52°F) |
| 19-24°C (66-75°F) | Less than 40% | 187-263 kPa (27-38 psi) | 1241-1503 kPa (180-218 psi) | 11°C (52°F) | 14°C (57°F) |
| Greater than 40% | 194-271 kPa (28-39 psi) | 1231-1551 kPa (179-225 psi) | 12°C (54°F) | 14°C (57°F) |
| 25-29°C (76-85°F) | Less than 35% | 218-286 kPa (32-42 psi) | 1341-1591 kPa (194-231 psi) | 13°C (55°F) | 16°C (61°F) |
| 35-60% | 193-276 kPa (28-40 psi) | 1310-1551 kPa (190-225 psi) | 14°C (57°F) | 16°C (61°F) |
| Greater than 60% | 225-294 kPa (33-43 psi) | 1393-1634 kPa (202-237 psi) | 14°C (57°F) | 17°C (63°F) |
| 30-35°C (86-95°F) | Less than 30% | 242-314 kPa (35-46 psi) | 1471-1741 kPa (213-2531 psi) | 16°C (61°F) | 19°C (66°F) |
| 30-50% | 245-317 kPa (36-46 psi) | 1501-1761 kPa (218-255 psi) | 17°C (63°F) | 19°C (66°F) |
| Greater than 50% | 249-322 kPa (36-47 psi) | 1531-1801 kPa (222-261 psi) | 17°C (63°F) | 20°C (68°F) |
| 36-41°C (96-105°F) | Less than 20% | 271-342 kPa (39-50 psi) | 1631-1881 kPa (237-273 psi) | 18°C (64°F) | 21°C (70°F) |
| 20-40% | 273-345 kPa (40-50 psi) | 1593-1827 kPa (231-265 psi) | 19°C (66°F) | 22°C (72°F) |
| Greater than 40% | 276-359 kPa (40-52 psi) | 1848-2041 kPa (268-296 psi) | 20°C (68°F) | 22°C (72°F) |
| 42-46°C (106-115°F) | Less than 20% | 301-367 kPa (44-53 psi) | 1841-2048 kPa (267-297 psi) | 20°C (68°F) | 23°C (73°F) |
| Greater than 20% | 302-369 kPa (44-54 psi) | 1801-2031 kPa (261-295 psi) | 21°C (70°F) | 24°C (75°F) |
| 47-49°C (116-120°F) | Less than 30% | 296-365 kPa (43-53 psi) | 1868-2075 kPa (271-301 psi) | 22°C (72°F) | 25°C (77°F) |
Scheme 17
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.
- 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 | Action | Values | Yes | No |
|---|
| IMPORTANT: 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. Open the windows in order to ventilate the interior of the vehicle. If the A/C system was operating, allow the A/C system to equalize for about 5 minutes. Turn OFF the ignition. Install the J 43600 ACR 2000 Air Conditioning Service Center. See Special Tools . Record the ambient air temperature displayed on the J 43600 . See Special Tools . Record the low and high side STATIC pressure readings. Are both the low side and high side pressures above the specified value? | More than 16°C (60°F) - 345 kPa (50 psi) More than 24°C (75°F) - 483 kPa (70 psi) More than 33°C (90°F) - 690 kPa (100 psi) | Go to Step 2 | Go to Leak Testing |
| 2 | IMPORTANT: Record the relative humidity and the ambient air temperature at the time of the test. Close the vehicle doors and windows. Open the driver's door window 12.7-15.2 cm (5-6 inches). Select the following HVAC control settings: The A/C is ON The maximum blower speed The maximum blower speed selected on the auxiliary blower controls Recirculation mode The Face mode The coldest temperature setting Passenger setting is OFF All A/C outlets are OPEN Install the temperature probes of the J 43600 in the left and right center A/C air outlets. See Special Tools . Apply the parking brake. Place the transaxle/transmission in the following position: PARK. Start the engine. Operate the A/C system for 5 minutes. Inspect A/C components for the following conditions: Abnormal frost areas Unusual noises IMPORTANT: Make sure that the compressor is engaged when taking the data. Press the RESET button, before using the print function of the J 43600 . See Special Tools . Print the following information: The outlet air temperatures The low-side pressure The high-side pressure Compare the low and high side pressures and the output temperatures to the A/C Performance Table. Does all the data recorded fall within the specified ranges of the A/C Performance Table? | | Go to Step 8 | Go to Step 3 |
| 3 | If the pressures and temperatures recorded do not fall within the specified ranges of the A/C Performance Table: Continue to operate the A/C system for an additional 5 minutes. RESET the J 43600 and record the pressures and temperatures again. See Special Tools . Compare the low and high side pressures and the output temperature to the A/C Performance Table. Does all the data recorded fall within the specified ranges? | | Go to Step 8 | Go to Step 4 |
| 4 | Do the high and low side pressures fall within the specified ranges, but the outlet temperatures do not? | | Go to Air Conditioning (A/C) Diagnostics - Pressure Zone A | 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 Air Conditioning (A/C) Diagnostics - Pressure Zone B | Go to Step 6 |
| 6 | Are the low and high side pressures both greater than the specified ranges? | | Go to Air Conditioning (A/C) Diagnostics - Pressure Zone C | Go to Step 7 |
| 7 | Is the high side pressure greater than or within the specified range, but the low side pressure is less than the specified range? | | Go to Air Conditioning (A/C) Diagnostics - Pressure Zone D | 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 - Automatic in HVAC Systems-Automatic |
| IMPORTANT |
|---|
| 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. |
| IMPORTANT |
|---|
| Record the relative humidity and the ambient air temperature at the time of the test. |
| IMPORTANT |
|---|
| Make sure that the compressor is engaged when taking the data. Press the RESET button, before using the print function of the J 43600 . See Special Tools . |
Air Conditioning (A/C) System Performance Test (LY7 w/Standard Cooling)
| Ambient Temperature | Relative Humidity | Low Side Service Port Pressure | High Side Service Port Pressure | Maximum Left Center Discharge Air Temperature | Maximum Left Side Rear Discharge Air Temperature |
|---|
| 13-18°C (55-65°F) | 0-100% | 150-221 kPa (22-32 psi) | 1191-1441 kPa (173-209 psi) | 10°C (50°F) | 11°C (52°F) |
| 19-24°C (66-75°F) | Less than 40% | 153-239 kPa (22-35 psi) | 1303-1524 kPa (189-221 psi) | 11°C (52°F) | 13°C (55°F) |
| Greater than 40% | 169-257 kPa (25-37 psi) | 1338-1558 kPa (184-226 psi) | 12°C (54°F) | 14°C (57°F) |
| 25-29°C (76-85°F) | Less than 35% | 187-261 kPa (27-38 psi) | 1391-1591 kPa (202-231 psi) | 13°C (55°F) | 15°C (59°F) |
| 35-60% | 196-262 kPa (28-38 psi) | 1411-1634 kPa (205-237 psi) | 14°C (57°F) | 15°C (59°F) |
| Greater than 60% | 203-280 kPa (29-41 psi) | 1517-1696 kPa (220-246 psi) | 15°C (59°F) | 16°C (61°F) |
| 30-35°C (86-95°F) | Less than 30% | 213-289 kPa (31-42 psi) | 1511-1721 kPa (219-250 psi) | 16°C (61°F) | 18°C (64°F) |
| 30-50% | 219-296 kPa (32-43 psi) | 1511-1711 kPa (219-248 psi) | 17°C (63°F) | 18°C (64°F) |
| Greater than 50% | 227-307 kPa (33-45 psi) | 1482-1682 kPa (215-244 psi) | 18°C (64°F) | 19°C (66°F) |
| 36-41°C (96-105°F) | Less than 20% | 242-316 kPa (35-46 psi) | 1613-1820 kPa (234-264 psi) | 18°C (64°F) | 20°C (68°F) |
| 20-40% | 245-322 kPa (36-47 psi) | 1651-1841 kPa (239-267 psi) | 19°C (66°F) | 21°C (70°F) |
| Greater than 40% | 252-328 kPa (37-48 psi) | 1631-1811 kPa (237-263 psi) | 20°C (68°F) | 21°C (70°F) |
| 42-46°C (106-115°F) | Less than 20% | 273-342 kPa (40-50 psi) | 1801-1981 kPa (261-287 psi) | 21°C (70°F) | 23°C (73°F) |
| Greater than 20% | 276-346 kPa (40-50 psi) | 1791-1941 kPa (260-282 psi) | 21°C (70°F) | 23°C (73°F) |
| 47-49°C (116-120°F) | Less than 30% | 302-359 kPa (44-52 psi) | 2075-2186 kPa (301-317 psi) | 22°C (72°F) | 25°C (75°F) |
Scheme 18
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.
- 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 | Action | Values | Yes | No |
|---|
| IMPORTANT: 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. Open the windows in order to ventilate the interior of the vehicle. If the A/C system was operating, allow the A/C system to equalize for about 5 minutes. Turn OFF the ignition. Install the J 43600 ACR 2000 Air Conditioning Service Center. See Special Tools . Record the ambient air temperature displayed on the J 43600 . See Special Tools . Record the low and high side STATIC pressure readings. Are both the low side and high side pressures above the specified value? | More than 16°C (60°F) - 345 kPa (50 psi) More than 24°C (75°F) - 483 kPa (70 psi) More than 33°C (90°F) - 690 kPa (100 psi) | Go to Step 2 | Go to Leak Testing |
| 2 | IMPORTANT: Record the relative humidity and the ambient air temperature at the time of the test. Close the vehicle doors and windows. Open the driver's door window 12.7-15.2 cm (5-6 inches). Select the following HVAC control settings: The A/C is ON The maximum blower speed The maximum blower speed selected on the auxiliary blower controls Recirculation mode The Face mode The coldest temperature setting Passenger setting is OFF All A/C outlets are OPEN Install the temperature probes of the J 43600 in the left and right center A/C air outlets. See Special Tools . Apply the parking brake. Place the transaxle/transmission in the following position: PARK. Start the engine. Operate the A/C system for 5 minutes. Inspect A/C components for the following conditions: Abnormal frost areas Unusual noises IMPORTANT: Make sure that the compressor is engaged when taking the data. Press the RESET button, before using the print function of the J 43600 . See Special Tools . Print the following information: The outlet air temperatures The low-side pressure The high-side pressure Compare the low and high side pressures and the output temperatures to the A/C Performance Table. Does all the data recorded fall within the specified ranges of the A/C Performance Table? | | Go to Step 8 | Go to Step 3 |
| 3 | If the pressures and temperatures recorded do not fall within the specified ranges of the A/C Performance Table: Continue to operate the A/C system for an additional 5 minutes. RESET the J 43600 and record the pressures and temperatures again. See Special Tools . Compare the low and high side pressures and the output temperature to the A/C Performance Table. Does all the data recorded fall within the specified ranges? | | Go to Step 8 | Go to Step 4 |
| 4 | Do the high and low side pressures fall within the specified ranges, but the outlet temperatures do not? | | Go to Air Conditioning (A/C) Diagnostics - Pressure Zone A | 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 Air Conditioning (A/C) Diagnostics - Pressure Zone B | Go to Step 6 |
| 6 | Are the low and high side pressures both greater than the specified ranges? | | Go to Air Conditioning (A/C) Diagnostics - Pressure Zone C | Go to Step 7 |
| 7 | Is the high side pressure greater than or within the specified range, but the low side pressure is less than the specified range? | | Go to Air Conditioning (A/C) Diagnostics - Pressure Zone D | 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 - Automatic in HVAC Systems-Automatic |
| IMPORTANT |
|---|
| 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. |
| IMPORTANT |
|---|
| Record the relative humidity and the ambient air temperature at the time of the test. |
| IMPORTANT |
|---|
| Make sure that the compressor is engaged when taking the data. Press the RESET button, before using the print function of the J 43600 . See Special Tools . |
Air Conditioning (A/C) System Performance Test (LH2 w/ Heavy Duty Cooling)
| Ambient Temperature | Relative Humidity | Low Side Service Port Pressure | High Side Service Port Pressure | Maximum Left Center Discharge Air Temperature | Maximum Left Side Rear Discharge Air Temperature |
|---|
| 13-18°C (55-65°F) | 0-100% | 164-231 kPa (24-34 psi) | 1338-1565 kPa (194-227 psi) | 10°C (50°F) | 11°C (52°F) |
| 19-24°C (66-75°F) | Less than 40% | 191-272 kPa (28-39 psi) | 1524-1675 kPa (221-243 psi) | 12°C (54°F) | 13°C (55°F) |
| Greater than 40% | 195-288 kPa (28-42 psi) | 1411-1691 kPa (205-245 psi) | 13°C (55°F) | 15°C (59°F) |
| 25-29°C (76-85°F) | Less than 35% | 222-300 kPa (32-44 psi) | 1524-1731 kPa (221-251 psi) | 15°C (59°F) | 16°C (61°F) |
| 35-60% | 230-310 kPa (33-45 psi) | 1561-1781 kPa (226-258 psi) | 15°C (59°F) | 17°C (63°F) |
| Greater than 60% | 236-328 kPa (34-49 psi) | 1581-1821 kPa (229-264 psi) | 16°C (61°F) | 18°C (64°F) |
| 30-35°C (86-95°F) | Less than 30% | 248-332 kPa (36-48 psi) | 1661-1868 kPa (241-271 psi) | 17°C (63°F) | 19°C (66°F) |
| 30-50% | 257-349 kPa (37-51 psi) | 1681-1924 kPa (244-279 psi) | 18°C (64°F) | 20°C (68°F) |
| Greater than 50% | 270-375 kPa (39-54 psi) | 1701-1981 kPa (247-287 psi) | 20°C (68°F) | 22°C (72°F) |
| 36-41°C (96-105°F) | Less than 20% | 275-355 kPa (40-52 psi) | 1811-2051 kPa (263-298 psi) | 19°C (66°F) | 21°C (70°F) |
| 20-40% | 283-378 kPa (41-55 psi) | 1821-2081 kPa (264-302 psi) | 21°C (70°F) | 22°C (72°F) |
| Greater than 40% | 301-400 kPa (44-58 psi) | 1917-2137 kPa (278-310 psi) | 22°C (72°F) | 24°C (75°F) |
| 42-46°C (106-115°F) | Less than 20% | 304-382 kPa (44-55 psi) | 2006-2193 kPa (291-318 psi) | 22°C (72°F) | 23°C (73°F) |
| Greater than 20% | 315-414 kPa (46-60 psi) | 2027-2261 kPa (294-328 psi) | 23°C (73°F) | 25°C (77°F) |
| 47-49°C (116-120°F) | Less than 30% | 331-413 kPa (51-62 psi) | 2091-2272 kPa (303-329 psi) | 24°C (75°F) | 26°C (79°F) |
Scheme 19
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.
- 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 | Action | Values | Yes | No |
|---|
| IMPORTANT: 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. Open the windows in order to ventilate the interior of the vehicle. If the A/C system was operating, allow the A/C system to equalize for about 5 minutes. Turn OFF the ignition. Install the J 43600 ACR 2000 Air Conditioning Service Center. See Special Tools . Record the ambient air temperature displayed on the J 43600 . See Special Tools . Record the low and high side STATIC pressure readings. Are both the low side and high side pressures above the specified value? | More than 16°C (60°F) - 345 kPa (50 psi) More than 24°C (75°F) - 483 kPa (70 psi) More than 33°C (90°F) - 690 kPa (100 psi) | Go to Step 2 | Go to Leak Testing |
| 2 | IMPORTANT: Record the relative humidity and the ambient air temperature at the time of the test. Close the vehicle doors and windows. Open the driver's door window 12.7-15.2 cm (5-6 inches). Select the following HVAC control settings: The A/C is ON The maximum blower speed The maximum blower speed selected on the auxiliary blower controls Recirculation mode The Face mode The coldest temperature setting Passenger setting is OFF All A/C outlets are OPEN Install the temperature probes of the J 43600 in the left and right center A/C air outlets. See Special Tools . Apply the parking brake. Place the transaxle/transmission in the following position: PARK. Start the engine. Operate the A/C system for 5 minutes. Inspect A/C components for the following conditions: Abnormal frost areas Unusual noises IMPORTANT: Make sure that the compressor is engaged when taking the data. Press the RESET button, before using the print function of the J 43600 . See Special Tools . Print the following information: The outlet air temperatures The low-side pressure The high-side pressure Compare the low and high side pressures and the output temperatures to the A/C Performance Table. Does all the data recorded fall within the specified ranges of the A/C Performance Table? | | Go to Step 8 | Go to Step 3 |
| 3 | If the pressures and temperatures recorded do not fall within the specified ranges of the A/C Performance Table: Continue to operate the A/C system for an additional 5 minutes. RESET the J 43600 and record the pressures and temperatures again. See Special Tools . Compare the low and high side pressures and the output temperature to the A/C Performance Table. Does all the data recorded fall within the specified ranges? | | Go to Step 8 | Go to Step 4 |
| 4 | Do the high and low side pressures fall within the specified ranges, but the outlet temperatures do not? | | Go to Air Conditioning (A/C) Diagnostics - Pressure Zone A | 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 Air Conditioning (A/C) Diagnostics - Pressure Zone B | Go to Step 6 |
| 6 | Are the low and high side pressures both greater than the specified ranges? | | Go to Air Conditioning (A/C) Diagnostics - Pressure Zone C | Go to Step 7 |
| 7 | Is the high side pressure greater than or within the specified range, but the low side pressure is less than the specified range? | | Go to Air Conditioning (A/C) Diagnostics - Pressure Zone D | 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 - Automatic in HVAC Systems-Automatic |
| IMPORTANT |
|---|
| 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. |
| IMPORTANT |
|---|
| Record the relative humidity and the ambient air temperature at the time of the test. |
| IMPORTANT |
|---|
| Make sure that the compressor is engaged when taking the data. Press the RESET button, before using the print function of the J 43600 . See Special Tools . |
Air Conditioning (A/C) System Performance Test (LY7 w/ Heavy Duty Cooling)
| Ambient Temperature | Relative Humidity | Low Side Service Port Pressure | High Side Service Port Pressure | Maximum Left Center Discharge Air Temperature | Maximum Left Side Rear Discharge Air Temperature |
|---|
| 13-18°C (55-65°F) | 0-100% | 153-221 kPa (22-30 psi) | 861-1121 kPa (125-163 psi) | 11°C (52°F) | 12°C (54°F) |
| 19-24°C (66-75°F) | Less than 40% | 180-262 kPa (26-38 psi) | 1069-1291 kPa (155-187 psi) | 14°C (57°F) | 15°C (59°F) |
| Greater than 40% | 185-274 kPa (27-40 psi) | 1048-1311 kPa (152-190 psi) | 14°C (57°F) | 15°C (59°F) |
| 25-29°C (76-85°F) | Less than 35% | 215-292 kPa (31-42 psi) | 1201-1441 kPa (174-209 psi) | 16°C (61°F) | 17°C (63°F) |
| 35-60% | 221-298 kPa (32-43 psi) | 1248-1475 kPa (181-214 psi) | 16°C (61°F) | 18°C (64°F) |
| Greater than 60% | 225-311 kPa (33-45 psi) | 1262-1510 kPa (183-219 psi) | 17°C (63°F) | 19°C (66°F) |
| 30-35°C (86-95°F) | Less than 30% | 244-326 kPa (35-47 psi) | 1386-1648 kPa (201-239 psi) | 18°C (646°F) | 20°C (68°F) |
| 30-50% | 250-338 kPa (36-49 psi) | 1361-1662 kPa (197-241 psi) | 19°C (66°F) | 21°C (70°F) |
| Greater than 50% | 258-354 kPa (37-51 psi) | 1371-1682 kPa (199-244 psi) | 20°C (68°F) | 22°C (72°F) |
| 36-41°C (96-105°F) | Less than 20% | 275-356 kPa (40-52 psi) | 1541-1758 kPa (224-264 psi) | 20°C (68°F) | 23°C (73°F) |
| 20-40% | 281-370 kPa (41-54 psi) | 1551-1821 kPa (225-264 psi) | 22°C (72°F) | 24°C (75°F) |
| Greater than 40% | 292-384 kPa (42-56 psi) | 1551-1831 kPa (225-266 psi) | 23°C (73°F) | 25°C (77°F) |
| 42-46°C (106-115°F) | Less than 20% | 309-385 kPa (45-56 psi) | 1731-1971 kPa (251-286 psi) | 23°C (73°F) | 25°C (77°F) |
| Greater than 20% | 316-401 kPa (46-58 psi) | 1741-1981 kPa (253-287 psi) | 24°C (75°F) | 27°C (81°F) |
| 47-49°C (116-120°F) | Less than 30% | 345-411 kPa (50-61 psi) | 1965-2193 kPa (285-318 psi) | 25°C (77°F) | 28°C (82°F) |
Scheme 20
