Table of contents: Test conditions ↓ Test results ↓ Diagnostics of malfunctions when…↓ Both high and low pressure readings…↓ Readings too high on the high…↓ Too low readings on the high…↓ Both high and low pressure readings…↓ Low pressure readings periodically…↓ The readings on the low pressure…↓
Test conditions
| Condition of the car | Location of the car: indoors or in the shade (in a well-ventilated place) |
| Doors | Closed |
| Windows doors | Open |
| Hood | Opened |
| TEMP regulator | Maximum cooling (COLD) |
| Blowing mode switch | At face level |
| Intake manifold closure (REC) button | Recirculation is on |
| Fan speed (supercharger) | Maximum speed |
| Engine speed | Idle speed. |
| Let the air conditioner run for 10 minutes before taking measurements | |
Test results
Table of dependence of intake air temperature on recirculation air temperature
Table of dependence of compressor operating pressure on ambient air temperature
*1: When the fan motor is running at low speed.
*2: When the fan motor is running at high speed.
Diagnostics of malfunctions when pressure deviates from the norm
If the high and/or low pressure side of the system is out of range, diagnose using a pressure gauge. The mark at the top of the gauge scale in the following table indicates the standard (normal) pressure range. However, since the standard (normal) the pressure range varies for different vehicles, please refer to the "Table of compressor operating pressure dependence on ambient air temperature".
Both high and low pressure readings are too high
Readings too high on the high pressure side and readings too low on the low pressure side
Too low readings on the high pressure side and too high readings on the low pressure side
Both high and low pressure readings are too low
Low pressure readings periodically become negative
The readings on the low pressure side become negative
