Test Description

WARNING: This page is about a different car, the 2003 Pontiac Sunfire and 2003 Chevrolet Cavalier. However, it is still accessible from the selected car via links, so may be relevant.

This test measure 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

The numbers below refer to the step numbers on the diagnostic table.

This step determines if the A/C system has at least the minimum refrigerant charge required to operate the system without damage.
This step measures the performance of the A/C system.
This step is to allow for vehicle variations as well as high ambient air temperatures.

Fig 1: Air Conditioning (A/C) System Performance Test (Step 1)

Courtesy of GENERAL MOTORS CORP.

Fig 2: Air Conditioning (A/C) System Performance Test (Steps 2-5)

Courtesy of GENERAL MOTORS CORP.

Fig 3: Air Conditioning (A/C) System Performance Test (Steps 6-8)

Courtesy of GENERAL MOTORS CORP.