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Service bulletin T-SB-0039-20 Rev

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10183284
Published by NHTSA2020-11-30
Manufacturer's numberT-SB-0039-20 Rev
Manufacturer's date2020-10-22
NHTSA componentELECTRICAL SYSTEM:SOFTWARE

NHTSA's summary

TSB: An initialization procedure is required to activate the Entune? 3.0 App Suite Connect for Audio, Audio Plus, and Premium Audio head units before they are used for the first time on new vehicles. The initialization procedure may also be performed under other circumstances, such as following a head unit replacement or after the customer?s personal settings are erased. The initialization procedure requires between 3 and 15 minutes to complete, depending on file size, cellular connection speed, and other factors. Following the initialization procedure, individual Entune? 3.0 apps may periodically update through an over-the-air update system. Updates are either optional or mandatory. The update procedure will take approximately 1 minute for each app requiring an update. Follow the Initialization/Update Procedure in this bulletin to perform the initialization and app updates.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Electrical system, Software

Vehicles listed
TOYOTA 4RUNNER2021
TOYOTA AVALON2021
TOYOTA C-HR2021
TOYOTA CAMRY2021
TOYOTA COROLLA2021
TOYOTA COROLLA HATCHBACK2021 (the catalog's model; the bulletin names a series or trim of it)
TOYOTA HIGHLANDER2021
TOYOTA MIRAI2021
TOYOTA PRIUS2021
TOYOTA PRIUS PRIME2021 (the catalog's model; the bulletin names a series or trim of it)
TOYOTA RAV42021
TOYOTA RAV4 PRIME2021 (the catalog's model; the bulletin names a series or trim of it)
TOYOTA SEQUOIA2021
TOYOTA SIENNA HYBRID2021 (the catalog's model; the bulletin names a series or trim of it)
TOYOTA TACOMA2021
TOYOTA TUNDRA2021
TOYOTA VENZA HYBRID2021 (the catalog's model; the bulletin names a series or trim of it)

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Other bulletins for the same vehicles and component
23TC08_Region Le2024-03-18. Service bulletin. RL: One of the features in your vehicle is the predictive efficient drive system. This system uses the navigation system to predict likely deceleration or stopping locations based on the driving situation and traffic patterns, to enhance fuel economy. However, for some vehicles, the navigation system may not learn these driving patterns due to a programming error in the skid control ECU.
23TC08 Dealer Pa2024-03-18. Service bulletin. DP: One of the features in your vehicle is the predictive efficient drive system. This system uses the navigation system to predict likely deceleration or stopping locations based on the driving situation and traffic patterns, to enhance fuel economy. However, for some vehicles, the navigation system may not learn these driving patterns due to a programming error in the skid control ECU.
TTT0716222023-12-26. Service bulletin. TT: Vehicle option selection during identification process when connecting Techstream for diagnosis/repair.
TSB0026202023-12-26. Service bulletin. TSB: All 2020 ? 2023 model year 4Runner, 2018 ? 2022 model year Sequoia, 2018 ? 2023 model year Tacoma, and 2018 ? 2021 model year Tundra vehicles are equipped with Pre-collision System (PCS) and Dynamic Radar Cruise Control (DRCC) as part of the Toyota Safety Sense (TSS) package. The PCS and DRCC systems are designed to help mitigate a potential collision and maintain a pre-determined traveling distance. It is recommended to disable the PCS and DRCC systems on vehicles that have been modified (ride height, oversized wheels/tires, brush bars, etc.) in a way that potentially disrupts the functionality of these systems. Vehicle owner?s written consent is required before performing the calibration to permanently disable the PCS and DRCC systems. Follow the Repair Procedure in this bulletin to disable the PCS and DRCC systems.
T-TT-0678-21 Rev2023-11-27. Service bulletin. TT: Some 19CY LG DCM equipped vehicles may not be able to complete the firmware update due to not having an active account or waived services during the trial. Follow the steps below to enable ?Temp DCM Activation?.
22TC042022-06-21. Service bulletin. TI: TECHNICAL INSTRUCTIONS SPECIAL SERVICE CAMPAIGN 22TC04 SOFTWARE UPDATE FOR EV CONTROL COMPUTER CERTAIN 2021 MODEL YEAR MIRAI VEHICLES
TSB003120Rev22022-06-21. Service bulletin. TSB: Some 2017 ? 2018 model year Prius Prime vehicles equipped with Premium Audio (R10A5430) or earlier may exhibit one or more of the following conditions. Updated multimedia software is now available to address these conditions. Follow the Multimedia Software Update Procedure in this bulletin to install the latest software version.
T-SB-0043-21 Rev2022-02-14. Service bulletin. TSB: Some 2020 model year vehicles equipped with Audio Plus (version 1060) or Premium Audio (version 1060) or earlier may exhibit the following condition: ?Distorted screen when using Apple CarPlay® while making a hands-free phone call. Some 2020 model year vehicles equipped with Audio Plus (version 1021) or Premium Audio (version 1021) or earlier may exhibit one or more of the following conditions: ?Barge in function defaulted to OFF. ?Limited phone book grammar. ?Difficult Hand Free operation. ?Abnormal Electronic Owner?s Manual operation. ?Music does not automatically resume when using Android Auto?. ?Cover art is not displayed. ?Vehicle position is not sent to Destination Assist server. ?System inoperative after using the return button when using voice recognition. Some 2020 model year vehicles equipped with Audio Plus (version 1035) or Premium Audio (version 1035) or earlier may exhibit one or both of the following conditions: ?Abnormal screen play while using Apple CarPlay® (primarily during phone calls). ?Poor sound quality during phone calls while using Apple CarPlay®. Some 2020 model year vehicles equipped with Audio Plus (version 1047) or Premium Audio (version 1047) or earlier may exhibit one or more of the following conditions: ?USB audio does not resume after ignition cycle. ?Intermittent rebooting. ?Bluetooth disconnecting during a phone call when using Apple CarPlay®. ?Intermittent screen freezing. ?Navigation intermittently will not boot up. ?Home Screen Audio widget is blank after a Destination Assist call. ?Song, artist, or album data missing. ?Abnormal clock operation. ?Apple CarPlay® intermittently inoperative. ?Radio takes a long time to boot up. A software update is now available to address these conditions. Follow the Software Update Procedure in this bulletin to update the software.
21TC06-RL_Publis2022-01-18. Service bulletin. RL: One of the Pre-Collision System (PCS) features in your vehicle is called ?pre-collision brake assist.? When you apply some pressure to the brake pedal, this feature of the system can automatically help further reduce speed if sensors detect the possibility of a crash. Due to incorrect software programming, there could be a delay in the activation of pre-collision brake assist, resulting in less overall vehicle speed reduction. However, the other features of PCS (the pre-collision warning and pre-collision braking) are not affected by this programming error.
21TC06-RL publi2021-10-25. Service bulletin. RL: One of the Pre-Collision System (PCS) features in your vehicle is called ?pre-collision brake assist.? When you apply some pressure to the brake pedal, this feature of the system can automatically help further reduce speed if sensors detect the possibility of a crash. Due to incorrect software programming, there could be a delay in the activation of pre-collision brake assist, resulting in less overall vehicle speed reduction. However, the other features of PCS (the pre-collision warning and pre-collision braking) are not affected by this programming error.