Audio Remote Switch Does Not Work Properly

Audio System Symptom Troubleshooting - Audio remote switch does not work properly

Audio remote switch does not work properly

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. Turn on the audio unit and check the audio unit operation (volume up, volume down, CH (UP), CH (DOWN), MODE).

Is the audio unit operation OK?

YES -

Operation is normal.�

NO -

Go to step 3.

3. Go to the audio button, knob, and remote switch detection mode in the audio system Self-Diagnostic Function Audio System Self-Diagnostic Function.

Are the remote switch functions detected and functioning properly?

YES -

Substitute a known-good audio unit; with navigation system Audio Unit Removal/Installation (With Navigation), without navigation system Audio Unit Removal/Installation (Without Navigation), and recheck. If the symptom/indication goes away, replace the original audio unit; with navigation system Audio Unit Removal/Installation (With Navigation), without navigation system Audio Unit Removal/Installation (Without Navigation).�

NO -

Go to step 4.

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

5. Disconnect audio unit connector A (24P).

NOTE: Eject all the CDs before disconnecting the audio unit and CD changer to prevent damaging the CD player's load mechanism.

6. Measure the resistance between audio unit connector A (24P) terminals No. 5 and No. 16 as specified in the table.






AUDIO REMOTE SWITCH TABLE





Is the resistance OK?

YES -

Go to step 7.

NO -

Repair a short or high resistance in the circuit between the audio unit and the audio remote switch. If the wires are OK, replace the cable reel Service and Repair.�

7. Check for continuity between body ground and audio unit connector A (24P) terminals No. 5 and No. 16 individually.





Is there continuity?

YES -

Repair a short to body ground in the circuit between the audio unit and the audio remote switch. If the wires are OK, replace the cable reel Service and Repair.�

NO -

Go to step 8.

8. Test the audio remote switch Audio Remote Switch Test.

Is the audio remote switch OK?

YES -

Replace the audio unit:

- With navigation system Audio Unit Removal/Installation (With Navigation).�
- Without navigation system Audio Unit Removal/Installation (Without Navigation).�

NO -

Replace the audio remote switch Overhaul.�