Unable To Select Audio Disc Changer

Audio System Symptom Troubleshooting - Unable to select audio disc changer

Unable to select audio disc changer

NOTE:

- Check the vehicle battery condition first Testing and Inspection.
- Check the connectors for poor connections or loose terminals.

1. Insert a known-good disc into the audio disc changer.

Does the disc load?

YES -

Go to step 2.

NO -

Go to Audio disc does not load troubleshooting Symptom Troubleshooting.�

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

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

4. Disconnect audio disc changer connector A (18P).

5. Check for continuity between audio unit connector B (14P) terminals and body ground according to the table.









Is there continuity?

YES -

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

NO -

Go to step 6.

6. Check for continuity between the terminals of audio unit connector B (14P) according to the table.









Is there continuity between any of the terminals?

YES -

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

NO -

Go to step 7.

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









Is there continuity?

YES -

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

NO -

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