Toyota Tundra Service Manual: Poor Sound Quality in All Modes (Low Volume)

PROCEDURE

(a) Set treble, middle and bass to the initial values and check that the sound is normal.

OK:

The sound returns to normal.

OK

END (AUDIO SETTINGS ARE DEFECTIVE)

NG

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

OK:

No difference is found.

OK

END (AUDIO SETTINGS ARE DEFECTIVE)

NG

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE