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

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

Audio-navigation unit power switch will not turn on (No information display and no sound) ('10 model with navigation)

NOTE:

- Check the vehicle battery condition first Testing and Inspection.
- Check the connectors for poor connections or loose terminals.

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

2. Push the power switch on to see if audio-navigation unit turns on.

Does the audio-navigation unit display operate properly, and does the audio 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. 17 (15 A) fuse and the No. 23 (10 A) fuse in the under-hood fuse/relay box and the No. 34 (7.5 A) fuse in the under-dash fuse/relay box.

Are the fuses OK?

YES -

Go to step 5.

NO -

Replace the fuse(s), and recheck.�

5. Remove the audio-navigation unit Audio-Navigation Unit Removal/Installation. Check that the audio-navigation unit is properly connected.

NOTE:

- Eject all the audio discs before removing the audio-navigation unit and the audio disc changer to prevent damaging the CD player's load mechanism.
- Remove the PC card before removing the audio-navigation unit.

Is it connected properly?

YES -

Go to step 6.

NO -

Reconnect the connector(s), and recheck the function.�

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

7. Measure the voltage between audio-navigation unit connector A (24P) terminal No. 14 and body ground, and between terminal No. 24 and body ground, and audio-navigation unit connector C (8P) terminal No. 1 and body ground.









Is there battery voltage on both terminals?

YES -

Go to step 8.

NO -

Repair an open in the wire(s) between the No. 17 (15 A) fuse in the No. 23 (10A) fuse in the under-hoodfuse/relay box and the No. 34 (7.5 A) fuse in the 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, audio-navigation unit connector C (8P) terminal No. 4 and body ground.









Is there less than 0.2 V on all terminals?

YES -

Substitute a known-good audio-navigation unit 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 audio-navigation unit connector A (24P) terminal No. 12 and body ground (G504), or audio-navigation connector C (8P) and body ground (G502).�