Basic Inspection 2 Power System Terminal Looseness And Battery Inspection
WARNING: This page is about a different car, the 2004 Nissan Murano. However, it is still accessible from the selected car via links, so may be relevant.
Make sure battery positive cable, negative cable and ground connection are not loose. If looseness is detected, tighten the piping to the specified torquer. In addition, check the battery voltage to make sure it has not dropped and alternator is normal.