Performance Test

AIR CONDITIONING (A/C) SYSTEM PERFORMANCE TEST

The following test measures the A/C system operating efficiency by comparing:
- The ambient air temperature
- The ambient air humidity
- The pressure at the high-pressure side of the refrigeration system
- The pressure at the low-pressure side of the refrigeration system
- The temperature of the air being discharged into the passenger compartment.

TEST DESCRIPTION

Step 1:

Steps 2-5:

Steps 6-8:

The numbers below refer to the step numbers on the diagnostic table.
1. This step determines if there is enough refrigerant in the A/C system in order 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 air temperatures.