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Audio System: Inspection

WARNING: This page is about a different car, the 2008 Subaru Impreza. However, it is still accessible from the selected car via links, so may be relevant.
AUDIO SYSTEM REFERENCE CHART

Symptom Repair order
No power coming in. (No display and no sound from speakers)
  1. Check the fuse and power supply for audio.
  2. Check the audio ground.
  3. Remove the audio for repair.
A specific speaker does not operate.
  1. Check the speaker.
  2. Check the output circuit between audio and speaker.
Audio generates noise with engine is running.
  1. Check the audio ground.
  2. Check the generator.
  3. Check the ignition coil.
  4. Remove the audio for repair.
Volume is low in AM and FM modes or interference noise occurs.
  1. Check the antenna.
  2. Check the audio ground.
  3. Remove the audio for repair.
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