Interface Dial Buttons Do Not Work
Interface Dial Buttons Do Not WorkNOTE:
- Check the vehicle battery condition first.
- Always check the connectors for poor connections or loose terminals.
- Before troubleshooting, make sure you have the anti-theft codes for the audio system and the navigation system.
- After troubleshooting, enter the navigation system anti-theft code.
- Always make sure that the correct DVD color and version are installed.
- Inspect the DVD for dirt or damage.
- 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 Diagnostic mode, and use "Hard Key" test under Unit Check.
Do the buttons work properly?
YES - The system is OK at this time.
NO - Go to step 3.
3. Try all the buttons on the navigation system.
Is there a specific row or columns of buttons, set of buttons, or a certain button that does not respond properly (i.e. pressing a button in the lower left corner causes a button in the lower right corner to respond.)?
YES - Replace the interface dial.
NO - Go to step 4.
4. Turn the ignition switch to ON (II).
5. Measure the voltage between the interface dial 5P connector No. 4 terminal and body ground.
Is there battery voltage?
YES - Go to step 6.
NO - Repair open in the wire between the under-dash fuse/relay box and the interface dial.
6. Turn the ignition switch to LOCK (0).
7. Disconnect the interface dial 5P connector.
8. Check for continuity between interface dial 5P connector No. 3 terminal and body ground.
Is there continuity?
YES - Go to step 9.
NO - Repair open in the wire between the interface dial and body ground (G506).
9. Check for continuity between navigation unit connector A (20P) No. 17 terminal and interface dial 5P connector No. 1 terminal.
Is there continuity?
YES - Check for an open in the wire between the navigation unit connector A (20P) No. 19 terminal and the interface dial 5P connector No. 2 terminal. If the wire is OK, go to step 10. If the wire is open, repair the wire.
NO - There is an open in the circuit between the interface dial and the navigation unit. Check for poor connections or loose terminals at the interface dial and navigation unit. If a poor connection or loose terminals is found, replace the affected shielded harness.
10. Substitute a known-good interface dial, and recheck.
Is the system OK?
YES - Replace the original interface dial.
NO - Replace the navigation unit.