Symptom Troubleshooting

Audio System Symptom Troubleshooting - Audio-navigation unit power switch will not turn off

Audio-navigation unit power switch will not turn off (with navigation)

NOTE:

- Check the vehicle battery condition first 12 Volt Battery Test.
- Check the connectors for poor connections or loose terminals.
- Check for aftermarket accessories plugged into the vehicle's accessory power sockets.

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

2. Press the power button off or turn the ignition switch to LOCK (0) to see if the audio-navigation unit turns off.

Does the audio-navigation unit turn off?

YES -

Operation is normal.

NO -

Go to step 3.

3. Turn the ignition switch to ON (II), press the power button on, then turn the ignition switch to LOCK (0).

Does the audio-navigation unit turn off?

YES -

Operation is normal.

NO -

Go to step 4.

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

5. Remove the audio-navigation unit Audio-Navigation Unit Removal/Installation, and disconnect audio-navigation unit connector A (24P).

NOTE:

- Eject all the audio 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.

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





Is there battery voltage?

YES -

Check for short to power in the wire.

NO -

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.