Test F: Navigation System Does Not Operate Correctly - The Navigation Screen Is Inoperative

PINPOINT TEST F: NAVIGATION SYSTEM DOES NOT OPERATE CORRECTLY - THE NAVIGATION SCREEN IS INOPERATIVE

F1:

F1-F3:

F3-F4:

Normal Operation
The screen display of the audio unit for audio and navigation is controlled by the navigation system module. A map digital versatile disc (DVD) stored in the navigation system module sends route data to the audio unit through the video interface circuits.

Possible Causes
- navigation system disc
- navigation system module
- audio unit