With CONSULT-II
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 Lighting switch ("HD/LMP 1ST SW") in "DATA MONITOR" mode.
When lighting switch is 1ST or 2ND: HD/LMP 1ST SW ON
When lighting switch is OFF: HD/LMP 1ST SW OFF