Driver Information Module (Dim): Function: Tachometer

Fig 1: Identifying Engine Temperature Gauge Function

Courtesy of VOLVO CARS OF NORTH AMERICA.

A flywheel sensor is connected to the engine control module (ECM) (4/46). The engine control module (ECM) transmits the engine speed on the high speed section of the control area network (CAN). The central electronic module (CEM) (4/56) 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 and displays the engine speed for the driver.