Toyota Sequoia 2020 — technical service bulletin
Bulletin T-TT-0571-19 · NHTSA communication 10165994 · issued Sep 5, 2019
Technical service bulletin
communication type
Electrical System
component
2020
model years
2
vehicle entries
Official summary
TT: Some 2020 model year Tundra and Sequoia vehicles may experience a B15DB or intermittent Wi-Fi inoperative (Wi-Fi icon greyed out). To simplify the diagnosis of the inoperative Wi-Fi, refer to the procedure below to prevent unnecessary parts replacement.
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.