Toyota 4RUNNER 2018–2019 — technical service bulletin
Bulletin T-TT-0516-18_Rev · NHTSA communication 10154797 · issued Feb 6, 2019
Technical service bulletin
communication type
Equipment
component
2018–2019
model years
22
vehicle entries
Official 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 (Telematics transceiver) inoperative conditions, refer to the procedure below to prevent unnecessary parts replacement.
Vehicles covered
- 2018 Toyota 4RUNNER
- 2019 Toyota 4RUNNER
- 2018 Toyota Avalon Hybrid
- 2019 Toyota Avalon Hybrid
- 2018 Toyota Camry Hybrid
- 2019 Toyota Camry Hybrid
- 2018 Toyota C-HR
- 2019 Toyota C-HR
- 2019 Toyota Corolla
- 2018 Toyota Highlander
- 2019 Toyota Highlander
- 2018 Toyota Highlander Hybrid
- 2019 Toyota Highlander Hybrid
- 2018 Toyota Land Cruiser
- 2019 Toyota Land Cruiser
- 2018 Toyota Mirai
- 2019 Toyota Mirai
- 2019 Toyota Prius
- 2019 Toyota Prius Prime
- 2019 Toyota RAV4 Hybrid
- 2018 Toyota Sienna
- 2019 Toyota Sienna
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.