You are in active maintenance mode. This is not a trouble code. It's an input parameter that you can command on while the truck drives normally. Someone selected this feature and turned it on either by accident or for testing the reach "out" switch on the control handle. If you depress the retract button you should see i 07"in" if the display does not change then you have a bad vehicle manager. That may be why the "Input 07" is on the display. If the truck is running fine just leave it. If it reaches in and out then the switch is ok. you can try to clear the test in active maint. Do you have the superword to access the maint mode?