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February 6, 2019 Service bulletin

TT: The microphone circuit passes through the DCM before reaching the radio/navigation system

Toyota technical service bulletin T-TT-0516-18_Rev for 2019 Toyota Prius, 2019 Toyota Corolla and 2018-2019 Toyota Sienna and others.

Bulletin number
T-TT-0516-18_Rev
Component
Equipment
Summary
TT: The microphone circuit passes through the DCM before reaching the radio/navigation system. To simplify the diagnosis of the microphone, Safety Connect SOS button lights, and DCM (Telematics transceiver) inoperative conditions, refer to the procedure below to prevent unnecessary parts replacement.

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