Audio Unit Power Switch Will Not Turn On (No Information Display And No Sound) (Without 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) (without navigation)

NOTE:

- Check the vehicle battery condition first Battery Test.
- 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 unit turns on.

Does the audio unit display operate properly, and does the audio 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 circuits.

5. Check for poor connections or loose terminals at audio unit connectors

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), or press the engine start/stop button to select the ON mode.

7. Measure the voltage between body ground and audio 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 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 unit.

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





Is there less than 0.2 V?

YES -

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.

NO -

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