Audio Unit Power Switch Will Not Turn Off

Symptom Troubleshooting: Audio unit power switch will not turn off

Audio unit power switch will not turn off

NOTE:

- Check the vehicle battery condition first. Testing and Inspection

- Check the connectors for poor connection or loose terminals.

- Check for aftermarket accessories plugged into the vehicle accessory power sockets.

- Eject all the CDs before removing the audio unit and CD changer to prevent damaging the CD player's load mechanism.

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

2. Push the power switch off to see if the audio unit turns off.

Does the audio unit turn off?
YES - Go to step 3.

NO - Replace the audio unit. Audio Unit Removal/Installation


3. Push the power switch on, then turn the ignition switch to LOCK (0).

Does the audio unit turn off?
YES - Operation is normal.

NO - Go to step 4.


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

5. Measure the voltage between audio unit connector A (20P) terminal No. 2 and body ground.

Is there battery voltage?
YES - Check for short to power on the PUR wire.

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