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 > Power Steering System(for 1ur-fe): Precaution
   PRECAUTION 1. HANDLING PRECAUTIONS FOR STEERING SYSTEM (a) Care must be taken when replacing parts. Incorrect replacement could affect the performance of the steering system and result in driving hazards. (b) Complete the adjustment of the steering wheel and wheel alignment, and then initialize the  ...