Normal System Performance - 72K/MH (45 MPH)
TEST DESCRIPTIONIMPORTANT: All test parameters must be followed to obtain accurate readings.
Record the manifold gauge pressures and outlet 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.
TEST PROCEDURE
1. Install thermometer in right center outlet.
2. Open doors and windows to stabilize interior temperature with outside ambient air temperature.
3. Recirc Off (outside air).
4. Set temperature lever to full cold.
5. Select 3rd blower speed.
6. Depress A/C button.
7. Vehicle running at 72 km/h (45 mph) with engine fully warmed up.
8. Continue running until system pressures and outlet temperature stabilize. Usually three to five minutes.
9. Record pressure and temperatures.
10. Compare readings to normal system performance chart below, then continue down diagnostic flow chart.
Diagnostic Flow Chart
NORMAL SYSTEM PERFORMANCE CHART
