Malfunction Threshold

Malfunction determination 1:

The difference between the current engine coolant temperature at the radiator (ECT 2) [ECT SENSOR 2] and the initial engine coolant temperature at the radiator (ECT 2) [ECT SENSOR 2] is at least 10.2°F (5.7°C) when either of these condition is met:

• When the estimated engine coolant temperature [EST ECT1] reached to 159.9°F (71.1°C).
• When the estimated engine coolant temperature [EST ECT1] changed 34.9°F (19.4°C).

Malfunction determination 2:

The estimated engine coolant temperature [EST ECT1] reaches to 158°F (70°C) before the actual engine coolant temperature at the engine (ECT 1) [ECT SENSOR 1] reaches to 158°F (70°C).