Audio Unit Power Switch Will Not Turn Off (With Navigation)

Audio System Symptom Troubleshooting - Audio unit power switch will not turn off

Audio unit power switch will not turn off (with navigation)

NOTE:

- Check the vehicle battery condition first Battery Test.
- Check for aftermarket accessories plugged info the vehicle's accessory power sockets.
- Check the connectors for poor connections or loose terminals.

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 off.

Does the audio system turn off?

YES -

Operation is normal.

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.

Does the audio-navigation unit turn off?

YES -

Go to step 5.

NO -

Go to step 4.

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





Is there battery voltage?

YES -

Check for short to power on the PUR wire.

NO -

Substitute a known-good audio-navigation unit (including the HDD) Audio-Navigation Unit Removal/Installation, and recheck. If the symptom/indication goes away, replace the original audio-navigation unit Audio-Navigation Unit Removal/Installation.

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

6. 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 7.

7. 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 8.

NO -

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

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

9. 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 10.

10. 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 -

Substitute a known-good audio-navigation unit (including the HDD) Audio-Navigation Unit Removal/Installation, and recheck. If the symptom/indication goes away, replace the original audio-navigation unit Audio-Navigation Unit Removal/Installation.

NO -

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