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May 13, 2020 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 2018-2020 Toyota Camry, 2018-2020 Toyota Prius and 2019-2020 Toyota Corolla and others.

Bulletin number
T-TT-0516-18_Rev
Component
Electrical system
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 (Data Communication Module/telematics transceiver) inoperative conditions, refer to the procedure below to prevent unnecessary parts replacement.

Owners of these vehicles have filed 649 complaints in the electrical category.

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