Immobilizer (2001-2004): Design: General
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.
The security system in the vehicle is a distributed system which is monitored by the central electronic module (CEM). A number of other units and components are involved for the various functions.