Symptom Troubleshooting

Navigation System Symptom Troubleshooting - No picture is displayed

No picture is displayed

Diagnostic Test: Self-Diagnosis Mode

NOTE:

- Check the vehicle battery condition first Testing and Inspection.
- Check if button has been pressed, and turned off the display (see owner's manual for more information).
- Check the connectors for poor connections or loose terminals.
- Before troubleshooting, make sure you have the anti-theft code for the navigation system.
- Make sure that the correct navigation DVD color and version are installed.
- Inspect the navigation DVD for dirt or damage.
- Check any official Honda service web site for more service information about the navigation system.

1. Check the No. 23 (10 A) fuse in the under-hood fuse/relay box and the No. 35 (7.5 A) fuse in the under-dash fuse/relay box, and reinstall the fuses if they are OK.

Are the fuses OK?

YES -

Go to step 2.

NO -

Replace the fuse, and recheck.�

2. Do the forced starting of the display Component Tests and General Diagnostics.

Is the diagnosis menu of the picture diagnosis displayed?

YES -

Go into Self-Diagnosis mode Navigation System Diagnostic Mode to check the links.�

NO -

Go to step 3.

3. Shield the navigation 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 -

Substitute a known-good navigation unit Service and Repair and recheck. If the problem goes away, replace the original navigation unit. If the problem is still present, replace the navigation display unit Service and Repair.�

NO -

Go to step 4.

4. Turn the ignition switch to ON (II).

5. Measure the voltage between body ground and navigation unit connector A (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 an open in the wire between the under-hood fuse/relay box and the navigation unit. If the ACC wire does not have voltage, repair an open in the wire between the under-dash fuse/relay box and the navigation unit.�

6. Measure the voltage between navigation unit connector A (8P) terminal No. 4 and body ground.





Is there 0.2 V or less?

YES -

Go to step 7.

NO -

Repair an open or high resistance in the wire between the navigation unit and body ground (G503) Harness Locations.�

7. Measure the voltage between body ground and navigation display unit 28P connector terminals No. 1 and No. 2 individually.





Is there battery voltage?

YES -

Go to step 8.

NO -

If the +B wire does not have voltage, repair an open in the wire between the under-hood fuse/relay box and the navigation display unit 28P connector. If the ACC wire does not have voltage, repair an open in the wire between the under-dash fuse/relay box and the navigation display unit 28P connector.�

8. Measure the voltage between navigation display unit 28P connector terminal No. 10 and body ground.





Is there less than 0.2 V?

YES -

Substitute a known-good navigation unit Service and Repair and recheck. If the problem goes away, replace the original navigation unit. If the problem is still present, replace the navigation display unit.�

NO -

Repair an open or high resistance in the wire between the navigation display unit and body ground (G502) Harness Locations.�