Primary lock
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.
Check that the cable terminal is undamaged.
Press the cable terminal into the housing.
Check that the cable terminal is properly locked by pulling carefully on the cable.