A/C System Performance Test

AIR CONDITIONING (A/C) SYSTEM PERFORMANCE TEST

TEST DESCRIPTION
This test measures the operating efficiency of the A/C system under the following conditions:
- The current ambient air temperature (AAT)
- 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

Step 1:

Steps 2 - 4:

Steps 5 - 8:

The numbers 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.