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 > Tire And Wheel System: How To Proceed With Troubleshooting
PROCEDURE 1. CHECK TIRE AND WHEEL SYSTEM DIAGNOSIS OF IRREGULAR TIRE WEAR GO TO STEP 9 DIAGNOSIS OF TIRE VIBRATION 2. TIGHTEN WHEEL NUTS NEXT 3. INSPECT TIRES Click here NG GO TO STEP 6 OK 4. INSPECT AND/OR ADJUST WHEEL BALANCE Click here NEXT 5. INSPECT FRONT AXLE HUB BEARING LOOSENESS AND AXLE HUB ...