| 1. | Check that the volume button is not set to min level. Is it at MIN level? YES - Raise the volume level, and recheck the function.n NO - Go to 2. |
| 2. | Check to see if there is a specific speaker that has no sound. Is there a specific one? YES - Go to 3. NO - Go to 6. |
| 3. | Turn the ignition switch OFF. |
| 4. | Check the speaker with no sound for any damage. Is there any damage? YES - Substitute the speaker and recheck.n NO - Go to 5. |
| 5. | Remove the speaker(s) with no sound, and disconnect its connector. |
| 6. | Check the speaker 2P connector for a loose or poor connection. Reconnect the speaker 2P connector and recheck the symptom; does it still fail? YES - Go to 7. NO - Operation is normal.n |
| 7. | Measure the resistance between the No. 1 and No. 2 terminals of the speaker connector. Is there about 4 W? YES - Go to 8. NO - Faulty speaker(s).n |
| 8. | Remove the audio unit. Disconnect audio unit connector A (20P). |
| 9. | Check the resistance between following terminals of audio unit connector A (20P) according to the table.
Is there about 4 W? YES - Go to 10. NO - Repair short in the wires between the audio unit and speaker.n |
| 10. | Disconnect the speaker 2P connector. |
| 11. | Check audio unit connector A (20P) terminals No. 5, 6, 7, 8, 15, 16, 17 and 18 individually for continuity to body ground.
Is there continuity? YES - Repair short to body ground in the wire between the audio unit and speaker.n NO - Substitute a known-good audio unit and recheck. If the symptom/ indication goes away, replace the original audio unit.n |