Toyota Tacoma (2015-2018) Service Manual: Poor Sound Quality in All Modes (Low Volume)

Toyota Tacoma (2015-2018) Service Manual / Navigation / Multi Info Display / Navigation System / Poor Sound Quality in All Modes (Low Volume)

PROCEDURE

1.	CHECK AUDIO SETTINGS

(a) Set "Treble", "Mid" and "Bass" to the initial values and check that sound is normal.

OK:

Malfunction disappears.

HINT:

Sound quality adjustment measures vary according to the type of amplifier.

END

2.	COMPARE WITH ANOTHER VEHICLE OF SAME MODEL

(a) Compare with another vehicle of the same model which does not have trouble to see if there is any difference in the sound quality.

OK:

No difference is found.

END

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

Touch Panel Switch does not Function

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Vehicle Position Mark Deviates Greatly

CAUTION / NOTICE / HINT NOTICE: If standard size tires are not installed, the vehicle position mark may deviate from the route even if the navigation system is operating normally. ...

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System Description
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A/C ECU Vehicle Information Reading/Writing Processor Malfunction (B15F5)
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Open in One Side of Bus 5 Branch Line
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