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December 21, 2017 Service bulletin

Some customers may complain of the inability to use certain functions of the navigation/infotainment...

Toyota technical service bulletin T-SB-0337-17 for 2018 Toyota Sienna, 2018 Toyota Tundra and 2018 Toyota 4RUNNER and others.

Bulletin number
T-SB-0337-17
Component
Electrical system: software
Summary
TSB: Some customers may complain of the inability to use certain functions of the navigation/infotainment system while the vehicle is in motion. The following software update modifies the system functionality while the vehicle is in motion, improving customer experience. New software is available to address the following: ? Phone keypad unlocked while vehicle is in motion ? Contact list unlocked while vehicle is in motion ? Bluetooth connected phone switching while vehicle is in motion ? Navigation transition improvements (if equipped) ? Revised BT-Audio help pop-up ? Call history list call function improvements ? Reboot after coming out of Reverse ? Errors during phonebook transfer ? Sound settings reset after ignition key cycle ? Surround turns back on after key cycle ?Abnormal operation when listening to FM HD Radio

Owners of these vehicles have filed 70 complaints in the electrical category.

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