Audio Unit Power Switch Will Not Turn On (No Information Display and No Sound) (With Navigation)

Audio System Symptom Troubleshooting - Audio unit power switch will not turn on (No information display and no sound)

Audio unit power switch will not turn on (No information display and no sound) (with navigation)

NOTE: Check the vehicle battery condition first Battery Test.

1. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

2. Push the VOLUME/POWER knob on to see if the audio system turns on.

Does the audio display operate properly, and does the audio-navigation unit sound normal?

YES -

Intermittent failure, the system is OK at this time.

NO -

Go to step 3.

3. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

4. Check the No. 15 (10 A) fuse in the under-hood fuse/relay box and the No. 18 (7.5 A) fuse in the driver's under-dash fuse/relay box.

Are the fuses OK?

YES -

Go to step 5.

NO -

Replace the fuse(s), and recheck. If the fuse(s) blows again, check for a short in the No. 15 (10 A) fuse and/or the No. 18 (7.5 A) fuse circuit(s).

5. Check for poor connections or loose terminals at the audio-navigation unit.

Are there connections or terminals OK?

YES -

Go to step 6.

NO -

Repair poor connections or loose terminals, and recheck.

6. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

7. Measure the voltage between body ground and audio-navigation unit connector A (24P) terminals No. 14 and No. 24 individually.





Is there battery voltage?

YES -

Go to step 8.

NO -

If the +B wire does not have voltage, repair an open in the wire between the No. 15 (10 A) fuse in the under-hood fuse/relay box and the audio-navigation unit. If the ACC wire does not have voltage, repair an open in the wire between the No. 18 (7.5 A) fuse in the driver's under-dash fuse/relay box and the audio-navigation unit.

8. Measure the voltage between audio-navigation unit connector A (24P) terminal No. 12 and body ground.





Is there less than 0.2 V?

YES -

Go to step 9.

NO -

Repair an open or high resistance in the wire between the audio-navigation unit and body ground (G502) Audio Wire Harness.

9. Measure the voltage between body ground and audio-navigation and HVAC switch panel connector A (20P) terminals No. 1 and No. 20 individually.





Is there battery voltage?

YES -

Go to step 10.

NO -

If the +B wire does not have voltage, repair an open in the wire between the No. 15 (10 A) fuse in the under-hood fuse/relay box and the audio-navigation and HVAC switch panel. If the ACC wire does not have voltage, repair an open in the wire between the No. 18 (7.5 A) fuse in the driver's under-dash fuse/relay box and the audio-navigation and HVAC switch panel.

10. Measure the voltage between audio-navigation and HVAC switch panel connector A (20P) terminal No. 3 and body ground.





Is there less than 0.2 V?

YES -

Go to step 11.

NO -

Repair an open or high resistance in the wire between the audio-navigation and HVAC switch panel and body ground (G501) Audio Wire Harness.

11. Measure the voltage between audio-navigation and HVAC switch panel connector A (20P) terminal No. 5 and body ground.





Is there battery voltage?

YES -

Go to step 12.

NO -

Repair an open or a short in the wire between the audio-navigation and HVAC switch panel and the audio-navigation unit.

12. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

13. Disconnect audio-navigation unit connector F (12P) and audio-navigation and HVAC switch panel connector A (20P).

14. Check for continuity between audio-navigation and HVAC switch panel connector A (20P) terminal No. 17 and body ground.





Is there continuity?

YES -

Repair a short to body ground in the wire between the audio-navigation and HVAC switch panel and the audio-navigation unit.

NO -

Go to step 15.

15. Check for continuity between audio-navigation unit connector F (12P) terminal No. 12 and audio-navigation and HVAC switch panel connector A (20P) terminal No. 17.





Is there continuity?

YES -

Go to step 16.

NO -

Repair an open in the wire between the audio-navigation and HVAC switch panel and the audio-navigation unit.

16. Reconnect audio-navigation and HVAC switch panel connector A (20P).

17. Check for continuity between audio-navigation and HVAC switch panel connector A (20P) terminal No. 17 and body ground.





Is there continuity?

YES -

Replace the audio-navigation and HVAC switch panel Audio-Navigation and HVAC Switch Panel Removal/Installation.

NO -

Go to step 18.

18. While press and holding the VOLUME/POWER knob, check for continuity between audio-navigation and HVAC switch panel connector A (20P) terminal No. 17 and body ground.





Is there continuity?

YES -

Go to step 19.

NO -

Replace the audio-navigation and HVAC switch panel Audio-Navigation and HVAC Switch Panel Removal/Installation.

19. Disconnect audio-navigation and HVAC switch panel connector A (20P).

20. Check for continuity between audio-navigation unit connector F (12P) and audio-navigation and HVAC switch panel connector A (20P) according to the table.













Is there continuity?

YES -

Go to step 21.

NO -

There is an open in the wire(s) between the audio-navigation unit and the audio-navigation and HVAC switch panel. Repair or replace the affected harness.

21. Check for continuity between audio-navigation and HVAC switch panel connector A (20P) and body ground according to the table.









Is there continuity?

YES -

There is a short in the wire(s) between the audio-navigation unit and the audio-navigation and HVAC switch panel. Repair or replace the affected harness.

NO -

Go to step 22.

22. Check for continuity between the terminals of audio-navigation and HVAC switch panel connector A (20P) according to the table.









Is there continuity between any of the terminals?

YES -

There is a short in the wires between the audio-navigation unit and the audio-navigation and HVAC switch panel. Replace the affected shielded harness.

NO -

Substitute a known-good audio-navigation and HVAC switch panel Audio-Navigation and HVAC Switch Panel Removal/Installation, and recheck. If the symptom/indication goes away, replace the original audio-navigation and HVAC switch panel Audio-Navigation and HVAC Switch Panel Removal/Installation. If the symptom/indication is still present, replace the audio-navigation unit Audio-Navigation Unit Removal/Installation.