Malfunction Threshold

Malfunction determination 1: 

The difference between the current engine coolant temperature at the radiator (ECT2) [ECT SENSOR 2] and the initial engine coolant temperature at the radiator (ECT 2) [ECT SENSOR 2] is at least 11 °F (6 °C) when either of these condition is met:

• When the estimated engine coolant temperature [EST ECT1] reached to 160 °F (72 °C).
• When the estimated engine coolant temperature [EST ECT1] changed 36 °F (20 °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).