Toyota Yaris 2019 — technical service bulletin
Bulletin T-TT-0509-18 · NHTSA communication 10152597 · issued Oct 18, 2018
Technical service bulletin
communication type
Electrical System
component
2019
model years
1
vehicle entries
Official summary
TT: Customers may be concerned with Air Conditioning system or Auto Leveling Headlight system issues. Technician cannot access the Air Conditioning ECU or Auto Leveling Headlight ECU using Techstream.
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.