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 > Front Door Lock(for Crewmax): Inspection
INSPECTION PROCEDURE 1. INSPECT FRONT DOOR LOCK ASSEMBLY LH (a) Check the door lock motor. (1) Apply battery voltage to the door lock motor and check operation of the door lock motor. OK: Measurement Condition Specified Condition Battery positive (+) → Terminal 4 (L) Battery negative (-) → Termi ...