Audio System Information Does Not Display On the Audio-HVAC Subdisplay Unit (With ELS Audio System) (With Navigation System)

Audio System Symptom Troubleshooting - Audio system information does not display on the audio-HVAC subdisplay unit (with ELS audio system)

Audio system information does not display on the audio-HVAC subdisplay unit (with ELS audio)

NOTE:

- Check the vehicle battery condition first Battery Test.
- Check the connectors for poor connections or loose terminals.

1. Remove the audio-HVAC subdisplay unit Audio-HVAC Subdisplay Unit Removal/Installationand the audio unit Audio Unit Removal/Installation (With Navigation System).

2. Check the connections at the audio-HVAC subdisplay unit 12P connector and audio unit connector C (28P).

Are the connectors and terminals connected properly?

YES -

Go to step 3.

NO -

Repair the connection, and recheck.

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

4. Measure the voltage between the audio-HVAC subdisplay unit 12P connector terminal No. 6 and body ground.





Is there less than 0.2 V?

YES -

Go to step 5.

NO -

Repair an open in the wire between the audio-HVAC subdisplay unit 12P connector terminal No. 6 and body ground (G502).

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

6. Disconnect audio unit connector C (28P) and the audio-HVAC subdisplay unit 12P connector.

7. Check for continuity between audio unit connector C (28P) and the audio-HVAC subdisplay unit 12P connector according to the table.









Is there continuity?

YES -

Go to step 8.

NO -

Repair an open in the wire(s) between the audio unit and the audio-HVAC subdisplay unit.

8. Check for continuity between the audio-HVAC subdisplay unit 12P connector terminals and body ground as shown.





Is there continuity?

YES -

Repair a short to body ground in the wire(s) between the audio unit and the audio-HVAC subdisplay unit.

NO -

Go to step 9.

9. Check for continuity between audio unit connector C (28P) and the audio-HVAC subdisplay unit 12P connector according to the table.









Is there continuity between any of the terminals?

YES -

Go to step 10.

NO -

There is an open in the wire(s) between the audio unit and the audio-HVAC subdisplay unit. Replace the affected shielded harness.

10. Check for continuity between body ground and the audio-HVAC subdisplay unit 12P connector 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-HVAC subdisplay unit. Replace the affected shielded harness.

NO -

Go to step 11.

11. Check for continuity between the terminals of the audio-HVAC subdisplay unit 12P connector 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-HVAC subdisplay unit. Replace the affected shielded harness.

NO -

Substitute a known-good audio unit Audio Unit Removal/Installation (With Navigation System), and recheck. If the symptom/indication goes away, replace the original audio unit Audio Unit Removal/Installation (With Navigation System). If the symptom is still present, substitute a known-good audio-HVAC subdisplay unit Audio-HVAC Subdisplay Unit Removal/Installation, and recheck. If the symptom/ indication goes away, replace the original audio-HVAC subdisplay unit Audio-HVAC Subdisplay Unit Removal/Installation.