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)

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

NOTE:

- Check the vehicle battery condition first Battery Test.
- Check the connectors for poor connections or loose terminals.
- Eject all the CDs before removing the audio-navigation unit to prevent damaging the CD player's loading mechanism.

1. With the ignition switch ON (II), push the power switch ON to see if the 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 2.

2. Turn the ignition switch to LOCK (0).

3. Check the No. 1 (10 A) fuse and the No. 14 (7.5 A) fuse in the under-dash fuse/relay box and the No. 1 (30 A) fuse (auxiliary under-dash fuse box) on the wire harness near the under-dash fuse/relay box.

Are the fuses OK?

YES -

Go to step 4.

NO -

Replace the fuse(s), and recheck.

4. Remove the audio-navigation unit Audio-Navigation Unit Removal/Installation (With Navigation). Check that the audio-navigation unit is properly connected.

Is it connected properly?

YES -

Go to step 5.

NO -

Reconnect the connectors, and recheck the function.

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

6. 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 D (20P) terminal No. 1 and body ground.









Is there battery voltage on both terminals?

YES -

Go to step 7.

NO -

Repair an open in the wire(s) between the No. 1 (10 A) fuse and the No. 14 (7.5 A) in the under-dash fuse/relay box and the No. 1 (30 A) fuse (auxiliary under-dash fuse box) on the wire harness near the under-dash fuse/relay box and the audio unit.

7. Turn the ignition switch to LOCK (0).

8. Reconnect audio-navigation unit connector A (24P) and connector D (20P).

9. Measure the voltage between audio-navigation unit connector A (24P) terminal No. 12 and body ground, and between audio-navigation unit connector D (20P) terminal No. 11 and body ground.









Is there less than 0.2 V on all terminals?

YES -

Replace the audio-navigation unit Audio-Navigation Unit Removal/Installation (With Navigation).

NO -

There is an open or high resistance in the wire between audio-navigation unit connector A (24P) terminal No. 12 or audio-navigation unit connector D (20P) terminal No. 11 and body ground (G503).