There Is No Sound From the Left Speaker When the USB Device Is Connected

Symptom Troubleshooting: There is no sound from the left speaker when the USB device is connected

There is no sound from the left speaker when the USB device is connected

NOTE:

- Check the vehicle battery condition first.

- Check the connectors for poor connections or loose terminals.

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

2. Check the sound output in AM/FM and CD modes.

Is the sound normal?
YES - Go to step 3.

NO - Go to no sound is heard from the speaker(s). No Sound Is Heard From the Speaker(S) (Display Is Normal)


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

4. Disconnect USB adapter unit connector A (14P).

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

6. Measure the voltage between USB adapter unit connector A (14P) terminals No. 1 and No. 2 and body ground individually.

Is there battery voltage?
YES - Go to step 7.

NO - Repair open in the wire(s) between the USB adapter unit and the audio unit.






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

8. Reconnect USB adapter unit connector A (14P).

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

10. Measure the voltage between USB adapter unit connector A (14P) terminal No. 11 and body ground.

Is there less than 0.1 V?
YES - Go to step 11.

NO - Repair open in the wire(s) between the USB adapter unit and the audio unit.






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

12. Disconnect USB adapter unit connector A (14P) and audio unit connector C (14P).

13. Check for continuity between terminals of USB adapter unit connector A (14P) and body ground according to the table. Then check for continuity between the same terminals listed in the table and USB adapter unit connector A (14P) terminal No. 4 (The harness shield).





Is there continuity?
YES - There is a short in the wire(s) between the USB adapter unit and the audio unit. Replace the affected shielded harness.

NO - Go to step 14.






14. Check for continuity between USB adapter unit connector A (14P) and audio unit connector C (14P) according to the table.





Is there continuity?
YES - Replace the USB adapter unit. USB Adapter Unit Replacement

NO - Repair open in the wire(s) between the USB adapter unit and the audio unit.