For 1990-2009 cars

Table 1: | A/C Performance Table

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 | 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 |

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.
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?

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.

1. Close the vehicle doors and windows.
2. Open the drivers door window 12.7-15.2 cm (5-6 inches).
3. Select the following HVAC control settings:

• | The A/C is ON

• | The coldest temperature setting

• | The maximum blower speed

• | Recirculation mode

• | The I/P panel outlet mode

• | All I/P panel outlets are OPEN

4. Install the temperature probes of the J 43600 in the left and right center panel air outlets.
5. Apply the parking brake.
6. Place the transaxle/transmission in one of the following positions:

• | PARK (Automatic)

• | NEUTRAL (Manual)

7. Start the engine.
8. Operate the A/C system for 5 minutes.
9. Inspect A/C components for the following conditions:

• | Abnormal frost areas

• | Unusual noises

Important: Press the RESET button, before using the print function of the J 43600 .

10. Print the following information:

• | The panel outlet air temperatures

• | The low-side pressure

• | The high-side pressure

11. 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 8

Go to Step 3

3 | If the pressures and temperatures recorded do not fall within the specified ranges:

1. Continue to operate the A/C system for an additional 5 minutes.
2. RESET the J 43600 and record the pressures and temperatures again.
3. 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 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 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 the specified range, but the low side pressure is within or 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 - Manual

#### A/C Performance 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% | 151-227 kPa (22-33 psi) | 620-1047 kPa (90-152 psi) | 8°C (46°F)
19-24°C (66-75°F) | Below 40% | 151-227 kPa (22-33 psi) | 840-1309 kPa (122-190 psi) | 9°C (48°F)
Above 40% | 151-261 kPa (22-38 psi) | 902-1412 kPa (131-205 psi) | 12°C (52°F)
25-29°C (76-85°F) | Below 35% | 165-254 kPa (24-37 psi) | 1171-1577 kPa (170-229 psi) | 12°C (52°F)
35-50% | 179-261 kPa (26-38 psi) | 1219-1619 kPa (177-235 psi) | 13°C (54°F)
Above 50% | 192-282 kPa (28-41 psi) | 1260-1708 kPa (183-248 psi) | 14°C (57°F)
30-35°C (86-95°F) | Below 30% | 199-289 kPa (29-42 psi) | 1440-1887 kPa (209-274 psi) | 14°C (57°F)
30-50% | 206-296 kPa (30-43 psi) | 1481-1970 kPa (215-286 psi) | 15°C (59°F)
Above 50% | 227-310 kPa (33-45 psi) | 1543-2080 kPa (224-302 psi) | 18°C (63°F)
36-41°C (96-105°F) | Below 20% | 241-323 kPa (35-47 psi) | 1743-2177 kPa (253-316 psi) | 18°C (63°F)
20-40% | 248-330 kPa (36-48 psi) | 1777-2259 kPa (258-328 psi) | 18°C (64°F)
Above 40% | 254-330 kPa (37-48 psi) | 1853-2349 kPa (269-341 psi) | 19°C (66°F)
42-46°C (106-115°F) | Below 20% | 282-365 kPa (41-53 psi) | 2053-2452 kPa (298-356 psi) | 20°C (68°F)
Above 20% | 289-358 kPa (42-52 psi) | 2101-2542 kPa (305-369 psi) | 22°C (70°F)
47-49°C (116-120°F) | Below 30% | 323-392 kPa (47-57 psi) | 2370-2769 kPa (344-402 psi) | 23°C (73°F)

#### Air Conditioning (A/C) System Performance Test