I once had the 6.5 boom radio with a cool screen that showed all the DTC's and a bunch of other mechanical and useful info. I can't remember how I got it to go to that screen but if anyone knows please reply.

I think it was in accessory mode or something.

 

Hold the power/mute button and then turn key to on while continuing to hold that button. After you click accept, the service mode should pop up

 

The odometer shows the same info if you hold down the trigger switch while switching on the ignition - use the trigger to scroll through.

 

Is a way to access this info. on the 4.3?

 

Odometer - works on any HD regardless of model.

 

Same screen is available on the 4.3 as the 6.5. You access it the same way.