Component Tests and General Diagnostics
REFRIGERANT SYSTEM PERFORMANCE TEST1. Warm up the engine and run it at a constant 1,500 rpm.
2. Set the fan switch at 4th position.
3. Turn the A/C switch on.
4. Set the RECIRCULATE mode.
5. Set the temperature control to MAX COLD.
6. Set the VENT mode.
7. Close all the doors and windows.
8. Wait until the center ventilator temperature stabilizes.
9. Measure the center ventilator temperature.
10. Measure the ambient temperature.
11. Verify that the intersection of the center ventilator temperature and the ambient temperature is in the shaded zone.
- If not as specified, troubleshoot the refrigerant system.
REFRIGERANT PRESSURE CHECK
1. Install the manifold gauge set.
2. Warm up the engine and run it at a constant 1,500 rpm.
3. Set the fan switch at 4th position.
4. Turn the A/C switch on.
5. Set the RECIRCULATE mode.
6. Set the temperature control to MAX COLD.
7. Set the VENT mode.
8. Close all the doors and windows.
9. Measure the ambient temperature and the high- and low-pressure side reading of the manifold gauge.
10. Verify that the intersection of the pressure reading of the manifold gauge and ambient temperature is in the shaded zone.
- If not as specified, troubleshoot the refrigerant system.