Toyota Camry Manual page 462

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Temporarily install another speaker.
Function OK?
Hissing sound from speaker?
Yes
Radio assembly faulty.
Recheck system after repair.
Tape Player
Is radio operating normally?
Is hiss produces by non–functioning speaker.
Is there continuity in speaker wire harness?
Temporarily install another speaker.
Functions OK?
Radio assembly faulty.
BODY ELECTRICAL SYSTEM
EITHER SPEAKER DOES NOT WORK
– AUDIO SYSTEM
Yes
Speaker faulty.
Power amplifier faulty.
Recheck system after repair.
Yes
Radio assembly faulty.
Yes
Radio assembly faulty.
Speaker wire harness faulty.
Yes
Speaker faulty.
BE–143