Upon installing the JB4 you'll need to use the menu 5 option to properly calibrate your gauges. Otherwise the numbers on the speedo, fuel gauge, and oil gauge won't align properly. You'll count up to 5 then set the tach based on your model and speedo type. Refer to the link below for the steering wheel controls sheet.
Also keep in mind the sheet posted has controls for the latest beta firmware. Production firmware mailed out with new JB4s may be missing menus 6 and 7.
http://www.n54tech.com/forums/showpo...61&postcount=1
Mike