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.
Fig 1: Identifying Terminal Removal Tools
Courtesy of VOLVO CARS OF NORTH AMERICA.
Use tools
9512630
,
9512631
to remove the primary lock, as shown in the illustration.