That's good it goes out. It means there is nothing active.
If you want to take a look at historical (Logged) Codes this is the procedure. Refer to the illustration at the bottom:-
1. Put the key in the ON position. The engine can remain stopped.
2. The Service Switch (1) is spring loaded and biased to the centre. Move it to the "Scroll" position and hold it there. Watch the display window where the hour meter normally appears.
3. The display window should change from the hourmeter to show "-0-", then "-1-", etc, etc.
4. When the display window shows "-3-" release the Service Switch. It will return back to the centre position.
5. Any Logged Diagnostic Codes will start to scroll across the screen one at a time.
6. When you want to get back to Mode "-0-" (Normal Operating Mode), move the Service Switch again the the "Scroll" position and hold it there. The Modes will count upwards and eventually will show "-0-" again. At that point release the Service Switch and the hourmeter should appear in the display window.
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