2. Check Ground Terminals
WARNING: This page is about a different car, the 2004 Infiniti Q45. However, it is still accessible from the selected car via links, so may be relevant.
Check ground terminals for corroding or loose connection.
Refer to HOW TO PERFORM EFFICIENT DIAGNOSIS FOR AN ELECTRICAL INCIDENT .
OK or NG
OK: GO TO 3.
NG: Repair or replace.