HELP - Fuel Economy menu missing !
 

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...

... please guys, any ideea is ok...

eject the cd and take off the + battery terminal for 10+mins then put terminal back on clean cd and reinsert it......the nav goes through a reboot the cd just makes it reboot i guess i had the same prob on my 03 i dont know which actually did it but it did....maybe the obd "thing hooked up to the engine is loose" just thought ill give you my 2 cents if that dont fix it ask anybody 4rm SO CAL they know EVERYTHING!!!!!!! lol .....seriously