The 2002 Lexus radio and navigation system fuse can be found in the fuse box. The radio and navigation system fuse will be the number six fuse.

Radio aids to navigation.

Wilfred John Davy Allan has written:

'The observer's book on radio navigation' -- subject(s): Radio in aeronautics, Navigation (Aeronautics)

When you hear the navigation instructions, you can simply use the radio volume knob to increase or decrease the navigation volume. If you want to mute the navigation volume, push the "mute" button in the midst of audio navigation instructions.