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.
- If you press and hold the VOLUME/POWER () knob for at least 2 seconds, the audio-navigation unit automatically checks the VIN and exits the anti-theft mode. If the unit does not exit the anti-theft mode, go to Audio unit does not exit anti-theft mode troubleshooting Audio Unit Does Not Exit Anti-Theft Mode (With Navigation).

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

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).

4. Check the No. B15 (20 A) fuse in the under-hood fuse/relay box and the No. C13 (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. B15 (20 A) fuse and/or the No. C13 (7.5 A) fuse circuit(s).

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

Are the 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).

7. Measure the voltage between body ground and audio-navigation unit connector A (24P) terminals No. 3 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. B15 (20 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. C13 (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. 1 and body ground.





Is there less than 0.2 V?

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 -

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