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% | 150-266 kPa (22-39 psi) | 740-1020 kPa (107-148 psi) | 12°C (54°F)
19-24°C (66-75°F) | Less than 40% | 150-231 kPa (22-34 psi) | 970-1300 kPa (141-189 psi) | 10°C (50°F)
Greater than 40% | 169-271 kPa (25-39 psi) | 960-1320 kPa (139-192 psi) | 14°C (57°F)
25-29°C (76-85°F) | Less than 35% | 167-248 kPa (24-36 psi) | 1210-1510 kPa (176-219 psi) | 12°C (54°F)
35-50% | 186-254 kPa (27-37 psi) | 1220-1530 kPa (177-222 psi) | 13°C (55°F)
Greater than 50% | 201-266 kPa (29-39 psi) | 1220-1560 kPa (177-226 psi) | 14°C (57°F)
30-35°C (86-95°F) | Less than 30% | 200-276 kPa (29-40 psi) | 1410-1760 kPa (205-255 psi) | 15°C (59°F)
30-50% | 206-270 kPa (30-39 psi) | 1430-1800 kPa (208-261 psi) | 15°C (59°F)
Greater than 50% | 214-261 kPa (31-38 psi) | 1450-1860 kPa (210-270 psi) | 16°C (61°F)
36-41°C (96-105°F) | Less than 20% | 242-316 kPa (35-46 psi) | 1640-1990 kPa (238-289 psi) | 18°C (64°F)
20-40% | 239-296 kPa (35-43 psi) | 1660-2040 kPa (241-296 psi) | 18°C (64°F)
Greater than 40% | 233-275 kPa (34-40 psi) | 1700-2100 kPa (247-305 psi) | 17°C (63°F)
42-46°C (106-115°F) | Less than 20% | 286-347 kPa (42-50 psi) | 1880-2190 kPa (273-318 psi) | 21°C (70°F)
Greater than 20% | 276-315 kPa (40-46 psi) | 1910-2260 kPa (277-328 psi) | 20°C (68°F)
47-49°C (116-120°F) | Less than 30% | 307-345 kPa (45-50 psi) | 2110-2350 kPa (306-341 psi) | 22°C (72°F)

#### A/C System Pressure Zone Classification