For 1990-2009 cars

## Air Conditioning (A/C) System Performance Test w/ C69

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. Update the ambient air temperature display:

• | Without Scan Tool

- | Turn ON the ignition.

- | Simultaneously press the A/C and RECIRC switches on the HVAC control module.

• | With Scan Tool

- | Turn ON the ignition.

- | Use the Instant OAT Update procedure in the scan tool Special Functions.

3. Open the windows in order to ventilate the interior of the vehicle.
4. If the A/C system was operating, allow the A/C system to equalize for about 2 minutes.
5. Turn OFF the ignition.
6. Install the J 43600 .
7. Record the ambient air temperature displayed on the J 43600 .
8. 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 in).
3. 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

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 PARK.
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 - Automatic

#### A/C System Pressure - Zone Classification with Aux A/C

#### A/C Performance Table

Ambient Temperature | Relative Humidity | Low Side Service Port Pressure | High Side Service Port Pressure | Maximum Left Center Discharge Air Temperature | Maximum Left Rear Discharge Air Temperature
--- | --- | --- | --- | --- | ---
13-18°C (55-65°F) | 0-100% | 172-275 kPa (25-40 psi) | 1419-1770 kPa (206-257 psi) | 12°C (52°F) | 13°C (55°F)
19-24°C (66-75°F) | Below 40% | 192-289 kPa (28-42 psi) | 1564-1812 kPa (227-263 psi) | 13°C (55°F) | 15°C (59°F)
Above 40% | 199-296 kPa (29-43 psi) | 1419-1694 kPa (206-246 psi) | 15°C (59°F) | 18°C (63°F)
25-29°C (76-85°F) | Below 35% | 206-303 kPa (30-44 psi) | 1564-1812 kPa (227-263 psi) | 17°C (61°F) | 18°C (64°F)
35-60% | 241-337 kPa (35-49 psi) | 1591-1915 kPa (231-278 psi) | 18°C (63°F) | 19°C (66°F)
Above 60% | 248-344 kPa (36-50 psi) | 1632-1922 kPa (237-279 psi) | 18°C (63°F) | 20°C (68°F)
30-35°C (86-95°F) | Below 30% | 268-372 kPa (39-54 psi) | 1839-2156 kPa (267-313 psi) | 19°C (66°F) | 23°C (72°F)
30-50% | 196-399 kPa (43-58 psi) | 1674-1949 kPa (243-283 psi) | 20°C (68°F) | 23°C (73°F)
Above 50% | 275-385 kPa (40-56 psi) | 1722-2060 kPa (250-299 psi) | 23°C (72°F) | 25°C (77°F)
36-41°C (96-105°F) | Below 20% | 289-378 kPa (42-55 psi) | 1750-1956 kPa (254-284 psi) | 23°C (72°F) | 25°C (77°F)
20-40% | 296-399 kPa (43-58 psi) | 1880-2777 kPa (273-316 psi) | 23°C (73°F) | 27°C (79°F)
Above 40% | 323-427 kPa (47-62 psi) | 1956-2204 kPa (284-320 psi) | 24°C (75°F) | 28°C (82°F)
42-46°C (106-115°F) | Below 20% | 358-461 kPa (52-67 psi) | 2177-2411 kPa (316-350 psi) | 25°C (77°F) | 29°C (84°F)
Above 20% | 351-454 kPa (51-66 psi) | 2163-2404 kPa (314-349 psi) | 27°C (79°F) | 30°C (86°F)
47-49°C (116-120°F) | Below 30% | 399-502 kPa (58-73 psi) | 2439-2645 kPa (354-384 psi) | 29°C (84°F) | 32°C (88°F)

## Air Conditioning (A/C) System Performance Test w/o C69

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. Update the ambient air temperature display:

• | Without Scan Tool

- | Turn ON the ignition.

- | Simultaneously press the A/C and RECIRC switches on the HVAC control module.

• | With Scan Tool

- | Turn ON the ignition.

- | Use the Instant OAT Update procedure in the scan tool Special Functions.

3. Open the windows in order to ventilate the interior of the vehicle.
4. If the A/C system was operating, allow the A/C system to equalize for about 2 minutes.
5. Turn OFF the ignition.
6. Install the J 43600 ACR 2000 Air Conditioning Service Center.
7. Record the ambient air temperature displayed on the J 43600 .
8. 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 in).
3. 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

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 PARK.
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 - Automatic

#### A/C System Pressure - Zone Classification

#### 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% | 130-296 kPa (19-43 psi) | 876-1412 kPa (127-205 psi) | 8°C (46°F)
19-24°C (66-75°F) | Below 40% | 144-303 kPa (21-44 psi) | 1129-1639 kPa (164-238 psi) | 12°C (52°F)
Above 40% | 151-303 kPa (22-44 psi) | 1205-1688 kPa (175-245 psi) | 03°C (50°F)
25-29°C (76-85°F) | Below 35% | 151-303 kPa (22-44 psi) | 1334-1846 kPa (198-268 psi) | 13°C (54°F)
35-60% | 179-282 kPa (26-41 psi) | 1646-1922 kPa (239-279 psi) | 13°C (54°F)
Above 50% | 179-282 kPa (26-41 psi) | 1667-1908 kPa (242-277 psi) | 12°C (52°F)
30-35°C (86-95°F) | Below 30% | 179-268 kPa (26-39 psi) | 1446-1701 kPa (210-247 psi) | 14°C (57°F)
30-50% | 179-282 kPa (26-41 psi) | 1481-1694 kPa (215-246 psi) | 14°C (57°F)
Above 50% | 179-275 kPa (26-40psi) | 1416-1653 kPa (206-240 psi) | 13°C (55°F)
36-41°C (96-105°F) | Below 20% | 213-310 kPa (31-45 psi) | 1660-1887 kPa (241-274 psi) | 15°C (59°F)
20-40% | 213-310 kPa (31-45 psi) | 1653-1908 kPa (240-277 psi) | 15°C (59°F)
Above 40% | 206-310 kPa (30-45 psi) | 1626-1853 kPa (236-269 psi) | 15°C (59°F)
42-46°C (106-115°F) | Below 20% | 234-337 kPa (34-49 psi) | 1825-2053 kPa (265-298 psi) | 18°C (63°F)
Above 20% | 241-344 kPa (35-50 psi) | 1798-2046 kPa (261-297 psi) | 18°C (63°F)
47-49°C (116-120°F) | Below 30% | 254-351 kPa (37-51 psi) | 2004-2246 kPa (291-326 psi) | 18°C (64°F)