Replacing the right-hand control valve for the vacuum pump: Removal: Preparations
WARNING: This page is about a different car, the 2004 Volvo S40, 2003 Volvo S40, 2002 Volvo S40, 2001 Volvo S40, and 2000 Volvo S40. However, it is still accessible from the selected car via links, so may be relevant.
Make a note of the anti-theft radio code.
Switch the ignition off and disconnect the battery negative lead according to Note when disconnecting and connecting the battery lead .