HELP - Fuel Economy menu missing !

[raven2k1]

Hi guys,I have a 2003 g35 Coupe with Navigation. After i bought and installed an video interface between the Navigation Unit and the main radio/cd player, i noticed that when i press the Info button, i don't have the "FUEL ECONOMY" menu.Today, i took out the video interface and left the car as it was before but i still don't see the Fuel economy menu.I know that if i press the d/n and map simoultaneusly, i can diagnose the unit. I get a "Faulty connection to the IMU" - searched on google and found nothing about this.I've checked all the fuses from the driver side also.

Do you have any ideeas what else can i check?Thank you in advance...