Switch for unlocking the fuel tank filler cover

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2006 Volvo S80, 2005 Volvo S80, 2004 Volvo S80, 2003 Volvo S80, and 2002 Volvo S80. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Fuel Tank Filler Cover Switch

Courtesy of VOLVO CARS OF NORTH AMERICA.

The switch for unlocking the fuel tank filler cover is located on the light switch module (LSM) (3/111). The switch is only on vehicles with fuel tank leakage diagnostics.

Light switch module (LSM) communicates in serial with the central electronic module (CEM). If the switch is pressed the central electronic module (CEM) sends a request to the rear electronic module (REM) that the lock motor for the fuel tank filler cover is activated. The cover can be opened if the speed of the vehicle is less than 7 km/h (5 mph).

The fuel tank filler cover is opened after a delay so that the automatic check for fuel leakage can be interrupted and the fuel tank pressure equalized. The fuel tank filler cover is then locked when the vehicle reaches a speed of 16 km/h (10 mph) or after 10 minutes if the vehicle has 2 stage locking function.