Navigation Switch Panel Buttons Inoperative

Navigation System Symptom Troubleshooting - Navigation switch panel buttons inoperative

Navigation switch panel buttons inoperative

Diagnostic Test: System Links

NOTE:

- Check the vehicle battery condition first Testing and Inspection.
- Check the connectors for poor connections or loose terminals.
- Confirm the correct DVD color and version disc is installed in the navigation unit Service and Repair as the wrong DVD software version can cause a hardware malfunction.
- 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.
- If the interface dial and/or joystick do not work, refer to symptom troubleshooting for interface dial and/or joystick do not work.

1. Check for a blown fuse No. 14 (7.5 A) in the under-dash fuse box.

Is the fuse OK?

YES -

Go to step 2.

NO -

Replace the blown fuse.�

2. Start the vehicle.

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

Do the navigation switch panel buttons operate properly?

YES -

The system is OK at this time.�

NO -

Go to step 4.

4. Measure the voltage between navigation switch panel 6P connector terminal No. 6 and body ground.





Is there battery voltage?

YES -

Go to step 5.

NO -

Repair an open in the wire between navigation switch panel 6P connector terminal No. 6 and the under-dash fuse box. If there is no open in the wire, replace the under-dash fuse box.�

5. Measure the voltage between navigation switch panel 6P connector terminal No. 4 and body ground.





Is there 0.2 V or less?

YES -

Go to step 6.

NO -

Repair the open in the wire between navigation switch panel connector (6P) terminal No. 4 and body ground (G502) Harness Locations.�

6. Check the connection of the navigation switch panel harness to the interface dial.

Is the connection secure?

YES -

Substitute a known-good navigation switch panel Service and Repair. If the problem is resolved, replace the original navigation switch panel Service and Repair. If not, replace the interface dial Service and Repair.�

NO -

Repair the poor connection, and reconnect the connector.�