Typical Malfunction Thresholds
WARNING: This page is about a different car, the 2025 Lexus RX 450h+ and 2024 Lexus RX 450h+. However, it is still accessible from the selected car via links, so may be relevant.
A malfunction is detected if any of the following conditions apply.
CONDITION 1
| Refrigerant cycle | Cooling Battery cooling or Battery Alone |
| Battery cooling after test mode | OFF |
| High pressure failsafe mode | ON |
| After high pressure protection recorded | Recorded 10 times or more |
| The No. 1 cooler thermistor (duct inlet 1) temperature when the compressor is operating dropped 3°C or more compared with when the compressor is stopped or The No. 1 cooler thermistor (duct inlet 2) temperature when the compressor is operating dropped 3°C or more compared with when the compressor is stopped |
Cannot detect 3 times or more |
CONDITION 2
| Refrigerant cycle | A/C Cooling and Battery Cooling |
| Battery cooling after test mode | ON |
| High pressure failsafe mode | OFF |
| Cooler condenser assembly temperature | 20 °C or higher |
| Opening angle of cooler expansion valve | 38.5 % or higher |
| Sum of opening angle of No. 1 magnet valve assembly and No. 3 magnet valve assembly | 10 % or higher |
| Average temperature of No. 2 air conditioning thermistor assembly (duct outlet 1) and No. 2 air conditioning thermistor assembly (duct outlet 2) | 20 °C or higher |
| Refrigerant Cycle | Battery Cooling |
| Battery Cooling after Test Mode | ON |
| High Pressure Failsafe Mode | OFF |
| Cooler condenser assembly temperature | 20 °C or higher |
| Opening angle of No. 1 magnet valve assembly and No. 3 magnet valve assembly | 38.5 % or higher |
| Average temperature of No. 2 air conditioning thermistor assembly (duct outlet 1) and No. 2 air conditioning thermistor assembly (duct outlet 2) | 20 °C or higher |