Symptom Troubleshooting

Navigation System Symptom Troubleshooting - Interface dial buttons do not work

Interface dial buttons do not work

NOTE:

- Check the vehicle battery condition first Battery Test.
- Check the connectors at the interface dial and the audio-navigation switch panel for poor connections or loose terminals.
- Make sure that the correct navigation DVD color and version are installed. The wrong navigation DVD or software version can cause a hardware malfunction.
- Inspect the navigation DVD for dirt or damage.
- Check any official Honda service website for more service information about the navigation system.
- Before troubleshooting, make sure you have the anti-theft codes for the audio system and the navigation system.
- After troubleshooting, enter the anti-theft codes for the audio system and the navigation system.

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

2. Go into the System Diagnostic Mode, and use the Hard Key test under the Unit Check.

Do the interface dial buttons work properly?

YES -

The system is OK at this time.

NO -

Go to step 3.

3. Turn the ignition switch to LOCK (0).

4. Remove the audio-navigation switch panel Audio-Navigation Switch Panel Removal / Installation.

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

6. Measure the voltage between interface dial 5P connector terminal No. 2 and body ground.





Is there battery voltage?

YES -

Go to step 7.

NO -

Repair an open in the wire between the No. B18 (7.5 A) fuse in the driver's under-dash fuse/relay box and the interface dial.

7. Measure the voltage between interface dial 5P connector terminal No. 3 and body ground.





Is there less than 0.2 V?

YES -

Go to step 8.

NO -

Repair an open or high resistance in the wire between the interface dial and body ground (G502).

8. Turn the ignition switch to LOCK (0).

9. Disconnect the interface dial 5P connector and navigation unit connector B (32P).

10. Check for continuity between and navigation unit connector B (32P) terminal No. 26 and body ground.





Is there continuity?

YES -

There is a short to body ground in the wire between the navigation unit and the interface dial. Replace the affected shielded harness.

NO -

Go to step 11.

11. Check for continuity between navigation unit connector B (32P) terminals No. 24 and No. 26.





Is there continuity?

YES -

There is a short in the wires between the navigation unit and the interface dial. Replace the affected shielded harness.

NO -

Go to step 12.

12. Check for continuity between navigation unit connector B (32P) terminal No. 26 and interface dial 5P connector terminal No. 5.





Is there continuity?

YES -

Go to step 13.

NO -

There is an open in the wire between the interface dial and the navigation unit. Replace the affected shielded harness.

13. Substitute a known-good interface dial Service and Repair, and recheck.

Is the system OK?

YES -

Replace the original interface dial Service and Repair.

NO -

Replace the navigation unit Service and Repair.