Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

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Symptom Troubleshooting




Symptom Troubleshooting: Audio system sound is weak or distorted (display is normal)

Audio system sound is weak or distorted (display is normal)

NOTE:

- Check the vehicle battery condition first.

- Check the connectors for poor connections or loose terminals.

1. Check for sound in each mode (AM, FM, XM, and CD).

Is there sound from the speakers, and is the sound quality normal in each mode?
YES - Intermittent failure. The system is OK at this time. Check for loose connections at the audio-navigation unit, the audio unit, the amplifier, and each speaker.

NO - Speakers all work, sound quality is poor.

- If the sound quality is poor only with the XM radio, or the XM radio does not function, go to poor or no sound with XM radio. Symptom Troubleshooting

- If the sound quality is poor only with AM or FM radio, go to poor AM or FM radio reception or interference. Symptom Troubleshooting

- If sound is poor in all modes, go to sound quality diagnosis. Sound Quality Diagnosis - Phase Test