Toyota PT546-00140, Troubleshooting Manual

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3 GENERAL Sound quality poor.
Head unit faulty.
Yes
Yes
Are all the connectors for speakers connected?
Speaker wire harness is faulty.
Check fade, balance settings.
No
Please set up a fade and balance
settings correctly.
Yes
Check treble, bass settings.
No
Please set up a treble and bass
settings correctly.
Dose the setting of the vehicle type match? Please set up a vehicle type
correctly.
No
Yes
Check input the device.
Check for bad speakers.
No
No
No
Input device is faulty.
Yes