DESCRIPTION The ECM calculates an appropriate cooling fan speed based on the engine coolant temperature, air conditioning switch condition, refrigerant pressure, hybrid coolant temperature, engine speed and vehicle speed, and sends the signals to the cooling fan ECU to regulate the cooling fans. The
The following may indicate that
your vehicle is overheating.
The needle of the engine coolant
temperature gauge
enters the red zone, or a loss of
hybrid system power is experienced.
(For example, the vehicle
speed does not increase.)
"Engine Coolant Temp High" or
"Hybrid System Ov