Engine Coolant Temperature (ECT)

Fig 1: Engine Coolant Module Communication And Display

Courtesy of VOLVO CARS CORPORATION

The engine control module (ECM), (4/46) processes the value it receives from the engine coolant temperature (ECT) sensor. The processed value is then transmitted to the central electronic module (CEM) (4/56) on the high speed section of the control area network (CAN). The central electronic module (CEM) receives the signal and generates a corresponding signal on the low speed section of the control area network (CAN). The driver information module (DIM) (5/1) reads the signal from the low speed section of the control area network (CAN).

The driver receives information via a text message and a warning lamp if the temperature becomes too high.