Driver Information Module (2001): Function: Tachometer
WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2009 Volvo S60, 2008 Volvo S60, 2007 Volvo S60, 2006 Volvo S60, and 2005 Volvo S60. However, it is still accessible from the selected car via links, so may be relevant.
A flywheel sensor (7/25) is connected to the engine control module (ECM) (4/46). The engine control module (ECM) transmits the engine speed signal onwards via 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 from the low speed section of the Control Area Network (CAN). The driver information module receives the value and presents the actual engine speed for the driver.