Possible DTC

Even if the map screen is touched, the car-navigation system cannot be operated

POSSIBLE CAUSE

• Audio unit malfunction (bad LCD panel)

• Car-navigation unit malfunction

Step

Inspection

Action

1

DETERMINE IF MALFUNCTION CAUSE IS AUDIO UNIT LCD PANEL

• Switch the ignition ON and launch the audio unit diagnostic assist function.

  (See DIAGNOSTIC ASSIST FUNCTION [AUDIO].)

• Select diagnostic assist code 01 display inspection.

• Is the display normal?

Yes

Go to the next step.

No

Replace the audio unit.

(See AUDIO UNIT REMOVAL/INSTALLATION.)

2

DETERMINE IF MALFUNCTION CAUSE IS CAR-NAVIGATION UNIT

• Select diagnostic assist code 16 external device connection information clearing.

• Switch the ignition off (LOCK).

• Switch the ignition ON (engine off or on).

• Launch the audio unit diagnostic assist function.

  (See DIAGNOSTIC ASSIST FUNCTION [AUDIO].)

• Select diagnostic assist code 15 vehicle NAVI signal verification.

• Is NAVI (USB) NG displayed?

Yes

Replace the car-navigation unit.

(See CAR-NAVIGATION UNIT REMOVAL/INSTALLATION.)

No

Replace the audio unit.

(See AUDIO UNIT REMOVAL/INSTALLATION.)