Symptom Troubleshooting

Audio System Symptom Troubleshooting - Poor or no sound with audio disc changer (with navigation)

Special Tools Required

- Diagnostic CD 07AAZ-SDBA100

Poor or no sound with audio disc changer (with navigation)

NOTE:

- Check the vehicle battery condition first.
- Check the connectors for poor connections or loose terminals.
- Disc labels should not be used in the audio unit. They may jam and damage the player mechanism.

1. Insert audio diagnostic CD (T/N: 07AAZ-SDBA100) in the audio disc changer.

Is the CD sound quality normal?

YES -

The original disc is faulty.�

NO -

Go to step 2.

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

3. Disconnect audio disc changer connector B (14P) and XM receiver connector A (14P).

NOTE: Eject all the CDs before removing the audio unit and the audio disc changer to prevent damaging the CD player's load mechanism.

4. Check for continuity between body ground and XM receiver connector A (14P) terminals according to the table. Then check for continuity between the same terminals listed in the table and audio disc changer connector B (14P) terminal No. 4 (the harness shield).









Is there continuity?

YES -

There is a short in the wire(s) between the audio disc changer and the XM receiver. Replace the affected shielded harness.�

NO -

Go to step 5.

5. Check for continuity between the XM receiver connector A (14P) and audio disc changer connector B (14P) according to the table.









Is there continuity?

YES -

Go to step 6.

NO -

There is an open in the wire(s) between the audio disc changer and the XM receiver. Replace the affected shielded harness.�

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

7. Disconnect audio disc changer connector A (18P) and audio unit connector B (14P).

8. Check for continuity between body ground and audio disc changer connector A (18P) terminals according to the table. Then check for continuity between the same terminals listed in the table and audio disc changer connector A (18P) terminals No. 11 and No. 14 (the harness shield).









Is there continuity?

YES -

There is a short to ground in the wire(s) between the audio disc changer and the audio unit. Replace the affected shielded harness.�

NO -

Go to step 9.

9. Disconnect audio unit connector B (14P).

10. Check for continuity between audio disc changer connector A (18P) terminals and audio unit connector B (14P) terminals according to the table.









Is there continuity?

YES -

Substitute a known-good audio disc changer Service and Repair, then reconnect all connectors, and recheck. If the symptom/indication goes away, replace the original audio disc changer Service and Repair. If the symptom/indication is still present, replace the audio unit Audio Unit Removal/Installation.�

NO -

There is an open in the wire(s) between the audio disc changer and the audio unit. Replace the affected shielded harness.�