PROCEDURE
(a) Set treble, middle and bass to the initial values and check that the sound is normal. OK: The sound returns to normal.
(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.
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Toyota Tundra Service Manual > Engine Immobiliser System (w/o Smart Key System): Precaution
PRECAUTION PRECAUTIONS WHEN USING TECHSTREAM (a) After all DTCs are cleared, check if the malfunction occurs again 6 seconds after turning the ignition switch to ON. PRECAUTIONS FOR THE KEY (a) The key is a precision instrument. Be sure to observe the following: (1) Do not drop or strike the key. (2 ...