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 > Lighting System: Headlight Dimmer Switch Circuit
DESCRIPTION The main body ECU (multiplex network body ECU) receives the following signals: Light control switch in off*1, DRL-Off*2, tail, head or Auto position Headlight dimmer switch in high, low or high flash (pass) position Fog light switch front position*3 *1: w/o DRL Off Switch *2: w/ DRL Off ...
