Symptom Troubleshooting

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.

- 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 the audio-navigation unit turns ON.

Does the 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. 9 (10 A) fuse in the under-hood fuse/relay box and the No. 8 (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 (With Navigation) Check that the audio-navigation unit is properly connected.

Is it connected properly?
YES - Go to step 6.

NO - Reconnect the connector, and recheck the function.


6. Disconnect audio-navigation unit connector A (24P).
NOTE: Eject all the discs before removing the audio-navigation unit to prevent damaging the CD player's load mechanism.

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

8. Measure the voltage between body ground and audio-navigation unit connector A (24P) terminals No. 14 and No. 24 individually.

Is there battery voltage on both terminals?
YES - Go to step 9.

NO - Repair open in the wire(s) between the No. 9 (10 A) fuse in the under-hood fuse/relay box and the No. 8 (7.5 A) fuse in the under-dash fuse/relay box and the audio-navigation unit.






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

10. Reconnect audio-navigation unit connector A (24P).

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

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

Is there less than 0.1 V on both terminals?
YES - Replace the audio-navigation unit. Audio-Navigation Unit Removal/Installation (With Navigation)

NO - Repair open in the wire between audio-navigation unit connector A (24P) terminal No. 12 and body ground (G503).