hi
if you google it theres lots of info on it
[Diagnostic Screen Access]
1.With the vehicle at rest, place the ignition switch in either
"ACC", "ON", or start the engine.
2.On the "Menu" screen, press the top center of the screen
(circled portion in the image to the left) for more than three
seconds.
3.Enter the PIN code, and then touch "OK".
660: Diagnosis Menu screen
661: System Check screen (DTC code verification screen)
662: GPS Information screen
4.The diagnostics screen will be displayed.2. DIAGNOSIS SCREEN
2.1 Diagnosis Menu
? Transition to various check screens from the Diagnosis menu screen.
cheers
Joe