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 remote switch operation (volume up, volume down, CH (UP), CH (DOWN), MODE).

Is the audio remote switch operation OK?
YES - Intermittent failure, the audio remote switch is OK at this time. Check for loose connections.

NO - Go to step 3.


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

Is the audio remote switch OK?
YES - Go to step 4.

NO - Replace the audio remote switch. Overhaul


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

5. Remove the audio unit. Audio Unit Removal/Installation

6. Disconnect audio unit connector A (20P).

7. Reconnect the audio remote switch, and measure the resistance between audio unit connector A (20P) terminals No. 3 and No. 11 as specified in the table.

AUDIO REMOTE SWITCH TABLE





Is the resistance OK?
YES - Go to step 8.

NO - Repair short or high resistance in the circuit between audio unit and the audio remote switch. If the wires are OK, replace the cable reel. Service and Repair






8. Check for continuity between body ground and terminals No. 3 and No. 11 of audio unit connector A (20P) 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 - Substitute a known-good audio unit Audio Unit Removal/Installation and recheck. If the symptom/indication goes away, replace the original audio unit. Audio Unit Removal/Installation