Audio Remote Switch Does Not Work Properly

Symptom Troubleshooting: Audio remote switch does not work properly

Audio remote switch does not work properly

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. 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. Initial Inspection and Diagnostic Overview

Are the remote switch functions detected and functioning properly?
YES - Substitute a known-good audio unit with navigation, Audio Unit Removal/Installation (With Navigation) without navigation, Audio Unit Removal/Installation (Without Navigation) and check. If the symptom/indication goes away, replace the original audio unit with navigation, Audio Unit Removal/Installation (With Navigation) without navigation. Audio Unit Removal/Installation (Without Navigation)

NO - Go to step 4.


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

Is the audio remote switch OK?
YES - Go to step 5.

NO - Replace the audio remote switch. Overhaul


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

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

- Without navigation Audio Unit Removal/Installation (Without Navigation)

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

8. Reconnect the audio remote switch, and measure the resistance between the 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 9.

NO - Repair 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






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

Is there continuity?
YES - Repair 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 - Replace the audio unit.

- With navigation Audio Unit Removal/Installation (With Navigation)

- Without navigation Audio Unit Removal/Installation (Without Navigation)