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.
- Before troubleshooting, make sure you have anti-theft code.
- After troubleshooting, enter the anti-theft code.
- Check the connectors for poor connections or loose terminals.
- Check any official Honda service website for more service information about the navigation system.

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

2. Go into the System Diagnostic Mode, and use 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. Measure the voltage between the interface dial 5P connector terminal No. 4 and body ground.





Is there battery voltage?

YES -

Go to step 4.

NO -

Repair an open in the wire between the No. 18 (7.5 A) fuse in the driver's under-dash fuse/relay box and the interface dial.

4. 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 5.

NO -

Repair an open or high resistance in the wire between the interface dial and body ground (G401).

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

6. Disconnect audio-navigation unit connector H (28P).

7. Disconnect the interface dial 5P connector.

8. Check for continuity between audio-navigation unit connector H (28P) terminal No. 26 and interface dial 5P connector terminal No. 1.





Is there continuity?

YES -

Go to step 9.

NO -

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

9. Check for continuity between audio-navigation unit connector H (28P) terminals No. 13 and No. 26.





Is there continuity?

YES -

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

NO -

Go to step 10.

10. 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 audio-navigation unit Audio-Navigation Unit Removal/Installation.