A/C Performance Test: Notes

WARNING: This page is about a different car, the 2002 Cadillac Seville. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Tools Required: ACR 2000 Air Conditioning Service Center (J-436900) or equivalent.

This test measures the operating efficiency of the A/C system under the following conditions:

Current ambient air temperature.
Current relative humidity.
High side pressure of the a/c system.
Low side pressure of the a/c system.
Temperature of the air being discharged into the passenger compartment.

NOTE:

The ambient air temperature must be at least 60°F (16°C).
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: The following numbers relate to the step numbers in the diagnostic procedure below:

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 and records the relative humidity and the ambient air temperature at the time of the test.
3 - This step is to allow for vehicle variations as well as high ambient temperatures.