Component Tests and General Diagnostics
REFRIGERANT SYSTEM PERFORMANCE TEST1. Inspect the refrigerant pressure.
2. Place a dry-bulb thermometer in the driver-side center ventilator outlet.
3. Start the engine and after it is warmed up, run it at a constant 1,500 rpm.
4. Set the fan switch to 4th speed.
5. Turn the A/C switch on.
6. Set to RECIRCULATE mode.
7. Set the temperature control to MAX COLD.
8. Set to VENT mode.
9. Close all the doors and windows.
10. Wait until the air conditioner output temperature stabilizes.
Stabilized condition
- The A/C compressor repeatedly turns on and off at regular intervals.
11. After the blower air is stabilized, read the dry-bulb thermometer.
12. Verify the ambient temperature.
13. Verify that the temperature reading is in the shaded zone.
- If the there is any malfunction, inspect the refrigerant system according to the troubleshooting chart.
REFRIGERANT PRESSURE CHECK
1. Connect the manifold gauge.
2. Start the engine and after it is warmed up, run it at a constant 1,500 rpm.
3. Set the fan switch to 4th speed.
4. Turn the A/C switch on.
5. Set to RECIRCULATE mode.
6. Set the temperature control to MAX COLD.
7. Set to VENT mode.
8. Close all the doors and all the windows.
9. Measure the manifold gauge reading and ambient temperature.
10. Verify that the high and low pressure readings are within each shaded zone.
- If there is any malfunction, inspect the refrigerant system according to the troubleshooting chart.