Removing the control module

Fig 1: Identifying Idle Air Control Valve

Courtesy of VOLVO CARS OF NORTH AMERICA.

Check that supply from main relay has been interrupted. Easiest method is to place fingertips on idle air control (IAC) valve. When the valve stops vibrating, the main relay has cut off supply to the system.

Fig 2: Removing Engine Control Module

Courtesy of VOLVO CARS OF NORTH AMERICA.

Open engine control module (ECM) box cover and remove Motronic 4.3/4.4 engine control module (ECM) (module nearest engine).