Normal System Performance - Service Stall/72 KM/H (45 MPH)

Record the manifold gauge pressures, outlet temperature and ambient air temperature with the following preset vehicle conditions:

IMPORTANT: If the ambient air temperature is lower than 5°C (40°F), the A/C compressor will not be enabled.

1. Install thermometer in right center outlet.
2. Open doors and windows to stabilize interior temperature with outside ambient air temperature.
3. Depress recirc button.
4. Set temperature lever to full cold.
5. Select 3rd blower speed.
6. Depress A/C button.
7. Engine fully warmed up and running at 2000 rpm.
8. Continue running until system pressures and outlet temperature stabilize. Usually five to seven minutes.
9. Record pressure and temperatures.
10. Compare readings to normal system performance charts then continue down diagnostic flow chart.

PERFORMANCE TEST - 72 KM/H (45 MPH)

Record the manifold gauge pressures and outlet temperature with the preset vehicle conditions listed above except for the following:

1. Recirc Off (outside air).
2. Vehicle running at 72 km/h (45 mph) with engine fully warmed up.




SYSTEM CONDITION CHARTS DEFINITION AND USAGE

KEY: STATEMENTS ARE USED TO INTERPRET THE PRESSURE AND TEMPERATURE READINGS COMPARED TO NORMAL SYSTEM PERFORMANCE. IF TESTING ABOVE OR BELOW AMBIENT TEMPERATURES LISTED, RELY ON KEY STATEMENTS TO DIAGNOSE SYSTEM.

THEN: Statements contain additional information to help you confirm your diagnosis and lead you to a corrective action.

^ When all pressure and temperature readings fall within the ranges of a given chart, use that chart to repair the vehicle.