PROCEDURE
(a) Set treble, middle and bass to the initial values and check that the sound is normal. OK: Malfunction disappears. HINT: Sound quality adjustment measures vary according to the type of amplifier.
(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.
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Toyota Tundra Service Manual > Trailer Brake Control System: Brake System Malfunction (C13A9)
DESCRIPTION This DTC is stored when a malfunction is detected in the vehicle stability control system. Check the vehicle stability control system when DTC C13A9 is stored. DTC No. Detection Item INF Code DTC Detection Condition Trouble Area C13A9 Brake System Malfunction - An oil pressure sensor or ...
