Typical Malfunction Thresholds
WARNING: This page is about a different car, the 2024 Lexus TX 550h+. However, it is still accessible from the selected car via links, so may be relevant.
JUDGMENT BY SIMULATED ENGINE COOLANT TEMPERATURE
| Duration that both of the following conditions are met | 5 seconds or more |
| Estimated engine coolant temperature | 75°C (167°F) or higher |
| Engine coolant temperature sensor output | Less than 75°C (167°F) |
JUDGMENT BY ENGINE COOLANT TEMPERATURE CHANGE AT HIGH VEHICLE SPEED
| Malfunction counter | 3 times or more |
| Malfunction counter is incremented when following conditions are met | A and B |
| A. Average engine coolant temperature change (vary with current engine coolant temperature, estimated ambient air temperature, intake air mass and vehicle speed) | Less than 0.03°C/sec (0.054°F/sec) |
| B. Engine coolant temperature is satisfied throughout this period | Less than 75°C (167°F) |