INSPECTION PROCEDURE 1. INSPECT THROTTLE BODY ASSEMBLY (a) Check the throttle valve. (1) Check that the throttle valve opens and closes smoothly. (2) Check that there is no sludge accumulating around the throttle body.
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Toyota Tundra Service Manual > Navigation System: Sound Signal Circuit between Navigation Receiver Assembly and Stereo Jack Adapter
DESCRIPTION The No. 1 stereo jack adapter assembly sends the sound signal from an external device to the navigation receiver assembly via this circuit. The sound signal that has been sent is amplified by the navigation receiver assembly, and then is sent to the speakers. If there is an open or short ...