Cooling Insufficient - A/C System

TEST DESCRIPTION

Cooling Insufficient, A/C System:

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

Steps 1-3:

Steps 4-8:

Steps 9-11:

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.