LEMON Manuals: Even more car manuals for everyone
Home >> Volvo >> 2002 >> S80 Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 35 (Control Modules - Design And Function - 2 Of 4) >> Immobilizer (2005-2009) >> System Overview >> General

System Overview: General

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.
Fig 1: Locating Immobilizer System Components
GLL146394Courtesy of VOLVO CARS OF NORTH AMERICA.

The immobilizer system increases the level of the vehicle safety system by making it extremely difficult to use the vehicle unless a valid key, which belongs to the vehicle, is used to start it. The identity of the key is checked when the vehicle is started, and if the key is not approved the engine will not start. The customer will not notice this function as long as a valid key is used an no fault occurs.

The immobilizer system includes: 

Definitions: 

Activated system:  The system means that the vehicle cannot be started.

Deactivated system:  Key check has been carried out and the key has been approved. The system permits the car to start.