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

Audio unit power will not turn off
NOTE:
  • Check for aftermarket accessories plugged into the vehicle's accessory power sockets.
  • Check the connectors for poor connections or loose terminals.
  1. Turn the ignition switch to ON (II).
  1. Push the power switch to see if the audio unit turn off.
Does the audio unit turn off?
YES -
Operation is normal.■
NO -
Go to Step 3 .
  1. Turn the ignition switch to LOCK (0).
Does the audio unit turn off?
YES -
NO -
Go to Step 4 .
  1. Remove the audio unit. and disconnect audio unit connector A (24P).
    NOTE: Eject the CD before removing the audio unit to prevent damaging the CD player's load mechanism.
  1. Measure the voltage between audio unit connector A (24P) No. 14 terminal and body ground.
Is there battery voltage?
YES -
Check for short to power on the PUR wire.
NO -
Substitute a known-good audio unit, and recheck. If the symptom/indication goes away, replace the original audio unit.■