Toyota Avalon 2018–2019 — technical service bulletin
Bulletin T-TT-0498-18 · NHTSA communication 10141583 · issued May 15, 2018
Technical service bulletin
communication type
Electrical System
component
2018–2019
model years
7
vehicle entries
Official summary
TT: Some customers may experience issues using Entune or Scout functions of the head unit. The following is a diagnostic supplement to assist in understanding how to diagnose this system.
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.