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 Pressure Warning System: Tire Pressure Warning Light Circuit
DESCRIPTION If the tire pressure warning ECU and receiver detects any problems, the tire pressure warning light blinks for 1 minute then illuminates, and tire pressure monitoring is disabled at the same time. At this time, the ECU stores a DTC in memory. Connecting terminals TC and CG of the DLC3 ma ...