Typical Malfunction Thresholds
CASE 1
| Actual engine coolant temperature | Less than 60°C (140°F) |
| Sigma (Modeled engine coolant temperature - Actual engine coolant temperature) | Higher than 1731.6°C (3148.9°F) (varies with engine coolant temperature at engine start) |
CASE 2
| Actual engine coolant temperature | Less than 77.8°C (172°F) (varies with ambient temperature at engine start) |
| Sigma (Modeled engine coolant temperature - Actual engine coolant temperature) | Higher than 1731.6°C (3148.9°F) (varies with engine coolant temperature at engine start) |
CASE 3
| Modeled engine coolant temperature - Actual engine coolant temperature | Higher than 11.1 °C (52°F) |
| Sigma (Modeled engine coolant temperature - Actual engine coolant temperature) | Higher than 1731.6°C (3148.9°F) (varies with engine coolant temperature at engine start) |