Audio Unit Power Switch Will Not Turn Off

Audio System Symptom Troubleshooting / Audio unit power switch will not turn off

Audio unit power switch will not turn off

NOTE: Check the connectors for poor connections or loose terminals.

1. Problem verification:

Problem verification
-1. Turn the ignition switch to ON (II).

-2. Press the POWER button off to see if the audio unit turns off.

Does the audio unit turn off?
-YES- Intermittent failure, the system is OK at this time.
-NO- The failure is duplicated, go to step 2.

2. Determine possible failure area (ACC line, others):

Determine possible failure area (ACC line, others)
-1. Turn the ignition switch to LOCK (0).

Does the audio unit turn off?
-YES- Go to step 4.
-NO- Go to step 3.

3. Shorted wire check (ACC line to power):

Shorted wire check (ACC line to power)
-1. Measure the voltage between test points 1 and 2.









Is there battery voltage?
-YES- Repair a short to power in the wire between the No. B19 (7.5 A) fuse in the under-dash fuse/relay box and the audio unit.
-NO- Replace the audio unit Audio Unit Removal and Installation.

4. Audio unit check:

Audio unit check
-1. Substitute a known-good audio switch panel Audio Unit Removal and Installation, and recheck.

Does the symptom go away?
-YES- Replace the original audio switch panel.
-NO- Replace the audio unit Audio Unit Removal and Installation.