Cooling Insufficient - A/C System

TEST DESCRIPTION

Steps 1-2:

Steps 3-4:

Steps 5-11:

The following test measures the A/C system operating efficiency by comparing:
^ The ambient air temperature at the time of the test
^ The ambient air humidity at the time of the test
^ 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 from the LH and RH center IP outlets into the passenger compartment

The number(s) below refer to the step number(s) on the diagnostic table.
2. This step determines if there is enough refrigerant in the A/C system to operate it without damage.
3. This step is to determine if the A/C compressor is operating.
4. This step measures the performance of the A/C system.
5. This step is to allow for vehicle variations as well as high ambient temperatures.