Audio Driving Instructions Cannot Be Heard

1. Push the display unit MENU key, and select "setup".

2. Check the audio driving instructions volume setting.

Is it set to OFF?

YES - Set the volume to an audible level.

NO - Go to step 3.

3. Turn the ignition switch OFF.
4. Disconnect the navigation unit 16P and the audio unit 20P connectors.




5. Check for continuity between body ground and navigation unit connector B (16P) terminals No.1, No.3, No.9 and No.10 individually.

Is there continuity?

YES - Repair short to body ground in the wire between the navigation unit and the audio unit.

NO - Go to step 6.




6. Check for continuity between navigation unit connector B (16P) terminal No.1 and the audio unit 20P connector terminal No.12.

Is there continuity?

YES - Go to step 7.

NO - Repair open in the wire between the navigation unit and the audio unit.




7. Check for continuity between navigation unit connector B (16P) terminal No.9 and the audio unit 20P connector terminal No.13.

Is there continuity?

YES - Go to step 8.

NO - Repair open wire between the navigation unit and the audio unit.




8. Check for continuity between navigation unit B (16P) connector terminal No.3 and the audio unit 20P connector terminal No.14.

Is there continuity?

YES - Go to step 9.

NO - Repair open in the wire between the navigation unit and the audio unit.




9. Check for continuity between navigation unit B (16P) connector terminal No.10 and the audio unit 20P connector terminal No.11.

Is there continuity?

YES - Go to step 10.

NO - Repair open in the wire between the navigation unit and the audio unit.

10. Substitute a known-good audio unit and recheck.

Is there system OK?

YES - Replace the audio unit.

NO - Replace the navigation unit.