Audio System Symptom Troubleshooting - Audio unit power switch will not turn off(With Normal Audio)

Audio unit power switch will not turn off 

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

• 1. Problem verification:

  - 1. Turn the vehicle to the ON mode.

  - 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 

  Go to step 2.

• 2. Shorted wire check (ACC line to power):

  - 1. Turn the vehicle to the OFF (LOCK) mode.

  - 2. Disconnect the following connector.

  NOTE:  Eject the disc before disconnecting the audio unit to prevent damaging the CD player's load mechanism.

  Audio unit connector A (24P)

  - 3. Measure the voltage between test points 1 and 2.

  Test condition	Vehicle OFF (LOCK) mode
  	Audio unit connector A (24P): disconnected
  Test point 1	Audio unit connector A (24P) No. 24 - Refer to: Audio Unit Connector for Inputs and Outputs(With Display Audio) Audio Unit Connector for Inputs and Outputs(With Normal Audio)
  Test point 2	Body ground

  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 - Refer to: Audio Unit Removal and Installation(With Display Audio)Audio Unit Removal and Installation(With Normal Audio) .