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

1. Start the vehicle.

2. Go into the System Diagnostic Mode, and use Hard Key test under 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), or press the engine start/stop button to select the OFF mode.

4. Connect the HDS to the DLC.

5. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

6. Check for DTCs with the HDS.

Are there any DTCs present?

YES -

Troubleshoot the DTC, then recheck.�

NO -

Go to step 7.

7. Measure the voltage between the interface dial 5P connector terminal No. 4 and body ground.





Is there battery voltage?

YES -

Go to step 8.

NO -

Repair an open in the wire between the driver's under-dash fuse/relay box and the interface dial.�

8. 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 9.

NO -

Repair an open or high resistance in the wire between the interface dial and body ground (G501).�

9. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

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

11. Disconnect the interface dial 5P connector.

12. 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 13.

NO -

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

13. 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 14.

14. 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 (With Navigation).�