W/Engine Driven Fan

Air Conditioning (A/C) System Performance Test (Gas Engine w/Engine Driven Fan)

This test measures the operating efficiency of the A/C system under the following conditions:
The current ambient air temperature
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:

Steps 3 - 8:

Test Description
The numbers below 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 air temperatures

A/C System Performance Test (Gas Engine W/ Electric Cooling Fan) Or RPO HP2:

A/C Performance Table - Gas Engine With Engine Driven Cooling Fan: