Check for continuity between navigation unit connector C (8P) terminal No. 4 and body ground. Is there continuity?
YES | - | Go to Step 9 .
NO | - | Repair open in the wire between the navigation unit and body ground (G603).■
Reconnect the navigation unit connector C (8P). Perform the forced starting of the display. Is the diagnosis menu of the picture diagnosis displayed?
YES | - | Go into the Diagnostic mode and use the ‘‘Navi System Link'' diagnostic to check the links.■
NO | - | Go to Step 11 .
Shield the display unit from the sun with your hand, and check that the display is back lit (only back light is ON.) Can you see the back light?
YES | - | Replace the navigation unit . ■
NO | - | Go to Step 12 .
Turn the ignition switch ON (II). |