Audio System Information Does Not Display On The Audio-HVAC Display Unit

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

NOTE:

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

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

2. Check the connections at the audio-HVAC display unit 12P connector and audio unit connector B (20P) (except 1 CD type) or connector B (12P) (1 CD type).

Are the connectors and terminals connected properly?

YES -

Go to step 3.

NO -

Repair the connection, and recheck.�

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





Is there battery voltage?

YES -

Go to step 4.

NO -

Repair an open in the wire between the No. 15 (10 A) fuse in the under-hood fuse/relay box and audio-HVAC display unit 12P connector terminal No. 6.�

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

5. Measure the voltage between audio-HVAC display unit 12P connector terminal No. 9 and body ground.





Is there less than 0.2 V?

YES -

Go to step 6.

NO -

Repair an open or high resistance in the wire between audio-HVAC display unit 12P connector terminal No. 9 and body ground (G401).�

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

7. Disconnect audio unit connector B (20P) (except 1 CD type) or connector B (12P) (1 CD type) and the audio-HVAC display unit 12P connector.

8. Check for continuity between audio unit connector B (20P) (except 1 CD type) or connector B (12P) (1 CD type) and the audio-HVAC display unit 12P connector according to the table.





















Is there continuity?

YES -

Go to step 9.

NO -

Repair an open in the wire(s) between the audio unit and the audio-HVAC display unit. Repair or replace the affected harness.�

9. Check for continuity between body ground and the audio-HVAC display unit 12P connector according to the table.









Is there continuity?

YES -

Repair a short to body ground in the wire(s) between the audio unit and the audio-HVAC display unit. Repair or replace the affected harness.�

NO -

Go to step 10.

10. Check for continuity between the terminals of audio unit connector B (20P) (except 1 CD type) or connector B (12P) (1 CD type) according to the table.

















Is there continuity between any of the terminals?

YES -

Repair a short in the wire(s) between the audio unit and the audio-HVAC display unit. Repair or replace the affected 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/indication is still present, replace the audio unit Audio Unit Removal/Installation (Without Navigation).�