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 | Action | Values | Yes | No |
|---|
| 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. Update the ambient air temperature display. Refer to Ambient Air Temperature Display Updating . 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 2 minutes. Turn OFF the ignition. Install the J 43600 ACR 2000 Air Conditioning Service Center. Record the ambient air temperature displayed on the J 43600 ACR 2000 Air Conditioning Service Center. Record the low and high side STATIC pressure readings. Are both the low side and high side pressures within 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 | NOTE: Record the relative humidity and the ambient air temperature at the time of the test. Close the vehicle doors and windows. Open the drivers door window 12.7-15.2 cm (5-6 in). Select the following HVAC control settings: The A/C is ON The coldest temperature setting The maximum blower speed Recirculation mode The panel outlet mode All panel outlets are OPEN Install the temperature probes of the J 43600 ACR 2000 Air Conditioning Service Center in the left and right center panel air outlets. Apply the parking brake. Place the transaxle/transmission in 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 Print the following information: The panel outlet air temperatures The low-side pressure The high-side pressure Compare the low and high side pressures and the panel output temperatures to the A/C performance table below. Does all the data recorded fall within the specified ranges of the A/C performance table? | | Go to Step 5 | Go to Step 3 |
| 3 | If the pressures and temperatures recorded do not fall within the specified ranges: Continue to operate the A/C system for an additional 5 minutes. RESET the J 43600 ACR 2000 Air Conditioning Service Center and record the pressures and temperatures again. Compare the low and high side pressures and the panel output temperature 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 5 | Go to Step 4 |
| 4 | Perform the necessary repairs. Refer to A/C Diagnostics Chart . Is the action complete? | | Go to Step 5 | |
| 5 | Operate the system in order to verify the test results. Did you find the same results? | | System OK | Go to Symptoms - HVAC Systems - Manual |
| 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. |
| NOTE |
|---|
| Record the relative humidity and the ambient air temperature at the time of the test. |
Air Conditioning (A/C) System Performance Test (LF1 or LFW)
| 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% | 151-199 kPa (22-29 psi) | 799-1129 kPa (116-164 psi) | 12°C (52°F) |
| 19-24°C (66-75°F | Below 40% | 151-220 kPa (22-32 psi) | 950-1309 kPa (138-190 psi) | 12°C (52°F) |
| Above 40% | 151-248 kPa (22-36 psi) | 999-1391 kPa (145-202 psi) | 13°C (55°F) |
| 25-29°C (76-85°F) | Below 35% | 165-241 kpa (24-35 psi) | 1178-1502 kPa (171-218 psi) | 13°C (54°F) |
| 35-50% | 179-254 kPa (26-37 psi) | 1219-1543 kPa (177-224 psi) | 13°C (55°F) |
| Above 50% | 213-303 kPa (31-44 psi) | 1460-1880 kPa (212-273 psi) | 15°C (59°F) |
| 30-35°C (86-95°F) | Below 30% | 186-268 kPa (27-39 psi) | 1357-1708 kPa (203-258 psi) | 14°C (57°F) |
| 30-50% | 199-282 kPa (29-41 psi) | 1398-1777 kPa (218-263 psi) | 14°C (57°F) |
| Above 50% | 227-303 kPa (33-44 psi) | 1515-1839 kPa (220-267 psi) | 15°C (59°F) |
| 36-41°C (96-105°F) | Below 20% | 213-296 kPa (31-43 psi) | 1570-1901 kPa (228-276 psi) | 15°C (59°F) |
| 20-40% | 220-310 kPa (32-45 psi) | 1598-1977 kPa (232-287 psi) | 15°C (59°F) |
| Above 40% | 234-323 kPa (34-47 psi) | 1667-2060 kPa (242-299 psi) | 17°C (61°F) |
| 42-46°C (106-115°F) | Below 20% | 248-316 kPa (36-46 psi) | 1777-2087 kPa (258-303 psi) | 17°C (61°F) |
| Above 20% | 254-330 kPa (37-48 psi) | 1818-2177 kPa (264-316 psi) | 18°C (63°F) |
| 47-49°C (116-120°F) | Below 30% | 275-351 kPa (40-51 psi) | 2011-2328 kPa (292-338 psi) | 18°C (64°F) |
