A/C System Performance Test
TEST DESCRIPTIONSteps 1-2:
Steps 3-8:
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
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.