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Home >> Volvo >> 2003 >> XC70 >> Repair and Diagnosis (Single Page) >> External Pages >> Different car >> Section 9 (Alarm System, Control Modules, Engine Management Systems - Design And Function) >> Central Electronic Module (CEM) (2005-2007) >> Function >> Fuel level (Gasoline/Diesel)
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Fuel level (Gasoline/Diesel)

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2007 Volvo V70, 2006 Volvo V70, 2005 Volvo V70, 2004 Volvo V70, and 2003 Volvo V70. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Fuel Level Communication Diagram
GLL146444Courtesy of VOLVO CARS OF NORTH AMERICA.

The fuel level is gauged by the fuel level sensors (7/130, 7/143). The signals from the sensors are transmitted to the central electronic module (CEM) (4/56). The central electronic module (CEM) calculates the remaining quantity of fuel by comparing the signals with a tank table stored internally. Information about the quantity of fuel is transmitted via the Control area network (CAN) to the driver information module (DIM) (5/1), where the fuel level is displayed on the fuel gauge.