Engine Control Module (ECM)

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: Engine Control Module

Courtesy of VOLVO CARS OF NORTH AMERICA.

Engine control module (ECM) (4/46) checks the ignition system in the vehicle. The engine control module (ECM) also grants permission to the central electronic module (CEM) if the starter motor is to be allowed to operate when attempting to start. The functions are activated after an approved check of the ignition key has been carried out and an approved identity check has been performed between the engine control module (ECM) and the central electronic module (CEM).

In order for the engine control module (ECM) to work in the immobilizer system, the control module must be programmed with codes. This takes place the first time during installation at the factory, and then if the control module is replaced (when downloading software).

For further information, see Design and Function, engine control module (ECM).