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] reaches to 160°F (72°C).
• When the estimated 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).