Malfunction Threshold
The engine running time before the engine coolant temperature reaches 14 °F (-10 °C), based on the initial engine coolant temperatures, is as follows:
| Initial engine coolant temperature | Engine running time |
| -40 °F (-40 °C) | 5 minutes or more |
| -21 °F (-29 °C) | 5 minutes or more |
| 14 °F (-10 °C) | 1 minute or more |