Audio system information does not display on the audio-HVAC display unit (without Navigation System)

Audio System Symptom Troubleshooting - Audio system information does not display on the audio-HVAC display unit

Audio system information does not display on the audio-HVAC display unit (without navigation)

NOTE:

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

1. Remove the audio unit Audio Unit Removal/Installation.

2. Check the connections at the audio unit connector D (20P).

Are the connectors and terminals connected properly?

YES -

Go to step 3.

NO -

Repair the connection, and recheck.�

3. Remove the audio-HVAC display unit Audio-HVAC Display Unit Removal/Installation.

4. Check the connections at the audio-HVAC display unit 16P connector.

Are the connectors and terminals connected properly?

YES -

Go to step 5.

NO -

Repair the connection, and recheck.�

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

6. Measure the voltage between body ground and audio-HVAC display unit 16P connector terminals
No. 7 and No. 8 individually.





Is there battery voltage?

YES -

Go to step 7.

NO -

Repair an open in the wire(s) between the No. 23 (10 A) fuse in the under-hood fuse/relay box, the
No. 36 (10 A) fuse in the under-dash fuse/relay box and audio-HVAC display unit.�

7. Measure the voltage between audio-HVAC display unit 16P connector terminal No. 13 and body ground.





Is there less than 0.2 V?

YES -

Go to step 8.

NO -

Repair an open or high resistance in the wire between audio-HVAC display unit 16P connector terminal No. 13 and body ground (G403).�

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

9. Disconnect audio unit connector D (20P) and the audio-HVAC display unit 16P connector.

10. Check for continuity between audio unit connector D (20P) and the audio-HVAC display unit 16P connector according to the table.













Is there continuity?

YES -

Go to step 11.

NO -

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

11. Check for continuity between body ground and audio-HVAC display unit 16P 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 display unit. Replace the affected shielded harness.�

NO -

Go to step 12.

12. Check for continuity between audio unit connector D (20P) according to the table.













Is there continuity between any of the terminals?

YES -

There is a short in the wires between the audio unit and the audio-HVAC display unit. Replace the affected shielded harness.�

NO -

Substitute a known-good audio-HVAC display unit Audio-HVAC Display Unit Removal/Installation, and recheck. If the symptom/indication goes away, replace the original audio-HVAC display unit Audio-HVAC Display Unit Removal/Installation. 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.�