Audio Unit Power Switch Will Not Turn On (No Information Display And No Sound)

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)

NOTE: Check the vehicle battery condition first Battery Test.

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

2. Push the VOL PUSH PWR knob on to see if 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).

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 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 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 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 -

Replace the audio unit:

- With navigation Audio Unit Removal/Installation (With Navigation).
- Without navigation Audio Unit Removal/Installation (Without Navigation).

NO -

Repair an open or high resistance in the wire between the audio unit and body ground (G402); with premium audio and navigation, with premium audio without navigation, without premium audio.