Cooling system - Td4 (Description): Description and operation (page 2 of 2)

For additional airflow through the radiator matrix, particularly when the vehicle is stationary, two electric cooling fans are fitted to the rear of the radiator. The fans are used for engine cooling and, if fitted, for air conditioning system cooling. Both fans operate in parallel at variable speeds controlled by the Engine Control Module (ECM) via a cooling fan ECU. The cooling fan ECU is located behind the radiator, below the bonnet closing panel. The temperature of the cooling system is monitored by the ECM via signals from an Engine Coolant Temperature (ECT) sensor, which is mounted in the cylinder head.