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

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. 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 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 3.


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

4. Check the No. 23 (10 A) fuse in the under-hood fuse/relay box and the No. 35 (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.
NOTE:

- Eject all the discs before removing the audio-navigation unit 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, and recheck the function.


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

7. 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 8.

NO - Repair an open in the wire(s) between the No. 23 (10 A) fuse in the under-hood fuse/relay box and the No. 35 (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, and between audio-navigation unit connector B (24P) terminal No. 17 and body ground.

Is there less than 0.2 V on both terminals?
YES - Replace the audio-navigation unit. Audio-Navigation Unit Removal/Installation (With Navigation)

NO - Repair an open or high resistance in the wire between audio-navigation unit connector A (24P) terminal No 12 and body ground (G505). or audio-navigation unit connector B (24P) terminal No 17 and body ground (G501).