Navigation System Symptom Troubleshooting - No picture is displayed

No picture is displayed NOTE

- Always check the connectors for poor connections or loose terminals.
- Diagnostic Test: Navi System Link

1. Check the No. 7 (10 A) fuse and No. 32 (7.5 A) fuse in the under-dash fuse/relay box, and reinstall the fuse if it is OK.

Is the fuse OK?

YES | - | Go to Step 2 .
NO | - | Replace the fuse and recheck.■

1. Turn the ignition switch to ACC (I).

1. Operate the radio and listen to the audio.

Can audio be heard?

YES | - | Go to Step 4 .
NO | - | Check the ACC circuit.■

1. Turn the ignition switch ON (II).

1. Measure the voltage between body ground and navigation unit connector C (8P) terminals No. 1 and No. 2 individually.

Is there battery voltage?

YES | - | Go to Step 6 .
NO | - | If the +B wire does not have voltage, repair open in the wire between the under-dash fuse/relay box and the navigation unit. If the ACC wire does not have voltage, repair open in the wire between the under-dash fuse/relay box and the navigation unit.■

1. Turn the ignition switch OFF.

1. Disconnect the navigation unit connector C (8P).

1. 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).■

1. Reconnect the navigation unit connector C (8P).

1. 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 .

1. 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 .

1. Turn the ignition switch ON (II).

1. Measure the voltage between body ground and display unit connector B (20P) terminal No. 1 and No. 2 individually.

Is there battery voltage?

YES | - | Replace the display unit.■
NO | - | If the +B wire does not have voltage, repair open in the wire between the under-dash fuse/relay box and the navigation unit. If the ACC wire does not have voltage, repair open in the wire between the under-dash fuse/relay box and the navigation unit.■