A/C System Service

Performance Test

The performance test will help to determine if the air conditioning system is operating within specifications.

1. Connect the Air Conditioning Service Station as shown.

NOTE: Connect the adapter to the high pressure hose first, then connect the hoses to the car as shown. When testing is completed, disconnect the hose adapter from the high-side fitting; do not disconnect the hose from the adapter, or refrigerant may escape from the system.

2. Insert a thermometer in the center vent outlet. Determine the relative humidity and ambient air temperature by calling the local weather station.

3. Test conditions:
•   Avoid direct sunlight.
•   Open engine hood.
•   Open front doors.
•   Set the temperature control dial to COLD and push the mode control button to VENT position and recirculation control button to REC position.
•   Slide the fan switch to the highest position.
•   Run the engine at 1,500 rpm.
•   No driver or passengers in vehicle.

4. After running the air conditioning for 10 minutes under the above test conditions, read the delivery temperature from the thermometer in the dash vent and the high and low system pressure from the Air Conditioning Service Station.