NO navigation subdisplay shown on the screen NOTE: Check that ''A/C mode'' is shown now on the display.

1. Repeat turning the ignition switch ON (II) and OFF to see if the problem appears.

Does the problem appear?

YES | - | Go to Step 2 .
NO | - | Operation is normal.■

1. Check the BUS communication DTC . Check to see if the entire LCD comes on, and goes out.

Does it come on and go out entirely?

YES | - | Faulty audio unit.■
NO | - | Go to Step 3 .

1. Remove the center upper panel , and check that the audio unit connector C (10P) is correctly connected to the navigation subdisplay.

Is it normal?

YES | - | Go to Step 4 .
NO | - | Reconnect the audio unit connector C (10P) and recheck the function. ■

1. Measure voltage between No. 1 and No. 2 terminals of the subdisplay assembly 10P connector.

Is there 5 V?

YES | - | Faulty navigation subdisplay and audio unit.■
NO | - | Go to Step 5 .

1. Measure voltage between No. 1 and No. 2 terminals of the audio unit connector C (10P).

Is there 5 V?

YES | - | Faulty navigation subdisplay and audio unit.■
NO | - | Faulty audio unit.■