Low pressure gauge
WARNING: This page is about a different car, the 2011 Suzuki SX4. However, it is still accessible from the selected car via links, so may be relevant.
SYMPTOM DIAGNOSIS DESCRIPTION CHART
| Condition | Possible cause | Correction |
|---|---|---|
| Pressure is higher than acceptable range ("C" area) | Expansion valve malfunction (valve opens too wide) | Check expansion valve. |
| Compressor malfunction (Insufficient compression) | Check compressor. | |
| Pressure is lower than acceptable range ("D" area) | Insufficient refrigerant (Insufficient charge or leakage) | Check for leakage, repair if necessary and recharge. |
| Expansion valve malfunction (valve opens too narrow) | Check expansion valve. | |
| Clogged refrigerant passage (crashed pipe) | Repair or replace. |
- 11) Check inlet port temperature-to-outlet port temperature relationship using the graph. For example, if temperature near air inlet of HVAC unit is 30 °C (86 °F) and the one at air outlet of center ventilation louver is 17 °C (62.6 °F), their crossing point is within acceptable range as shown in the graph. In this case, cooling performance is satisfactory and proper.
- 12) If crossing point is out of acceptable range, diagnose trouble referring to the following table.