TSB: TOYOTA AVALON, AVALON HYBRID, CAMRY, CAMRY HYBRID, COROLLA, COROLLA CROSS, COROLLA HATCHBACK, COROLLA HYBRID, RAV4, RAV4 HYBRID, SIENNA, SIENNA HYBRID, VENZA, VENZA HYBRID (2020–2023)
Bulletin T-TT-0678-21 Rev — December 15, 2022
Bulletin Details
| Bulletin ID | T-TT-0678-21 Rev |
| Manufacturer | TOYOTA |
| Models | AVALON, AVALON HYBRID, CAMRY, CAMRY HYBRID, COROLLA, COROLLA CROSS, COROLLA HATCHBACK, COROLLA HYBRID, RAV4, RAV4 HYBRID, SIENNA, SIENNA HYBRID, VENZA, VENZA HYBRID |
| Model Years | 2020–2023 |
| Date Issued | December 15, 2022 |
| Date Added to NHTSA | November 27, 2023 |
| Component | ELECTRICAL SYSTEM:SOFTWARE |
| Vehicles Affected | 59 combinations |
What is a TSB?
A Technical Service Bulletin is a document issued by the vehicle manufacturer to inform dealership technicians about a known issue and the recommended repair procedure. TSBs are not mandatory recalls — they serve as repair guidance for common problems.
If your vehicle has this issue, bring this bulletin ID to your dealer. If under warranty, the repair should be covered at no cost.
Summary
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?.
Affected Vehicles
| Make | Model | Year | Component |
|---|---|---|---|
| TOYOTA | COROLLA | 2023 | 353000 EQUIPMENT:ELECTRICAL |
| TOYOTA | COROLLA HYBRID | 2023 | 353000 EQUIPMENT:ELECTRICAL |
| TOYOTA | AVALON | 2022 | 353000 EQUIPMENT:ELECTRICAL |
| TOYOTA | AVALON | 2022 | 118000 ELECTRICAL SYSTEM:SOFTWARE |
| TOYOTA | AVALON HYBRID | 2022 | 353000 EQUIPMENT:ELECTRICAL |
| TOYOTA | AVALON HYBRID | 2022 | 118000 ELECTRICAL SYSTEM:SOFTWARE |
| TOYOTA | CAMRY | 2022 | 353000 EQUIPMENT:ELECTRICAL |
| TOYOTA | CAMRY | 2022 | 118000 ELECTRICAL SYSTEM:SOFTWARE |
| TOYOTA | CAMRY HYBRID | 2022 | 118000 ELECTRICAL SYSTEM:SOFTWARE |
| TOYOTA | COROLLA | 2022 | 353000 EQUIPMENT:ELECTRICAL |
| TOYOTA | COROLLA | 2022 | 118000 ELECTRICAL SYSTEM:SOFTWARE |
| TOYOTA | COROLLA CROSS | 2022 | 118000 ELECTRICAL SYSTEM:SOFTWARE |
| TOYOTA | COROLLA HATCHBACK | 2022 | 118000 ELECTRICAL SYSTEM:SOFTWARE |
| TOYOTA | COROLLA HYBRID | 2022 | 118000 ELECTRICAL SYSTEM:SOFTWARE |
| TOYOTA | COROLLA HYBRID | 2022 | 353000 EQUIPMENT:ELECTRICAL |
| TOYOTA | RAV4 | 2022 | 118000 ELECTRICAL SYSTEM:SOFTWARE |
| TOYOTA | RAV4 | 2022 | 353000 EQUIPMENT:ELECTRICAL |
| TOYOTA | RAV4 HYBRID | 2022 | 353000 EQUIPMENT:ELECTRICAL |
| TOYOTA | RAV4 HYBRID | 2022 | 118000 ELECTRICAL SYSTEM:SOFTWARE |
| TOYOTA | SIENNA | 2022 | 353000 EQUIPMENT:ELECTRICAL |
| TOYOTA | SIENNA | 2022 | 118000 ELECTRICAL SYSTEM:SOFTWARE |
| TOYOTA | SIENNA HYBRID | 2022 | 353000 EQUIPMENT:ELECTRICAL |
| TOYOTA | SIENNA HYBRID | 2022 | 118000 ELECTRICAL SYSTEM:SOFTWARE |
| TOYOTA | VENZA | 2022 | 353000 EQUIPMENT:ELECTRICAL |
| TOYOTA | VENZA | 2022 | 118000 ELECTRICAL SYSTEM:SOFTWARE |
| TOYOTA | VENZA HYBRID | 2022 | 118000 ELECTRICAL SYSTEM:SOFTWARE |
| TOYOTA | AVALON | 2021 | 353000 EQUIPMENT:ELECTRICAL |
| TOYOTA | AVALON | 2021 | 118000 ELECTRICAL SYSTEM:SOFTWARE |
| TOYOTA | AVALON HYBRID | 2021 | 353000 EQUIPMENT:ELECTRICAL |
| TOYOTA | AVALON HYBRID | 2021 | 118000 ELECTRICAL SYSTEM:SOFTWARE |
| TOYOTA | CAMRY | 2021 | 353000 EQUIPMENT:ELECTRICAL |
| TOYOTA | CAMRY | 2021 | 118000 ELECTRICAL SYSTEM:SOFTWARE |
| TOYOTA | CAMRY HYBRID | 2021 | 118000 ELECTRICAL SYSTEM:SOFTWARE |
| TOYOTA | COROLLA | 2021 | 118000 ELECTRICAL SYSTEM:SOFTWARE |
| TOYOTA | COROLLA | 2021 | 353000 EQUIPMENT:ELECTRICAL |
| TOYOTA | COROLLA HATCHBACK | 2021 | 353000 EQUIPMENT:ELECTRICAL |
| TOYOTA | COROLLA HATCHBACK | 2021 | 118000 ELECTRICAL SYSTEM:SOFTWARE |
| TOYOTA | COROLLA HYBRID | 2021 | 353000 EQUIPMENT:ELECTRICAL |
| TOYOTA | COROLLA HYBRID | 2021 | 118000 ELECTRICAL SYSTEM:SOFTWARE |
| TOYOTA | RAV4 | 2021 | 118000 ELECTRICAL SYSTEM:SOFTWARE |
| TOYOTA | RAV4 | 2021 | 353000 EQUIPMENT:ELECTRICAL |
| TOYOTA | RAV4 HYBRID | 2021 | 118000 ELECTRICAL SYSTEM:SOFTWARE |
| TOYOTA | RAV4 HYBRID | 2021 | 353000 EQUIPMENT:ELECTRICAL |
| TOYOTA | SIENNA | 2021 | 353000 EQUIPMENT:ELECTRICAL |
| TOYOTA | SIENNA | 2021 | 118000 ELECTRICAL SYSTEM:SOFTWARE |
| TOYOTA | SIENNA HYBRID | 2021 | 118000 ELECTRICAL SYSTEM:SOFTWARE |
| TOYOTA | SIENNA HYBRID | 2021 | 353000 EQUIPMENT:ELECTRICAL |
| TOYOTA | VENZA | 2021 | 353000 EQUIPMENT:ELECTRICAL |
| TOYOTA | VENZA | 2021 | 118000 ELECTRICAL SYSTEM:SOFTWARE |
| TOYOTA | VENZA HYBRID | 2021 | 118000 ELECTRICAL SYSTEM:SOFTWARE |
| TOYOTA | CAMRY | 2020 | 118000 ELECTRICAL SYSTEM:SOFTWARE |
| TOYOTA | CAMRY | 2020 | 353000 EQUIPMENT:ELECTRICAL |
| TOYOTA | CAMRY HYBRID | 2020 | 118000 ELECTRICAL SYSTEM:SOFTWARE |
| TOYOTA | COROLLA HATCHBACK | 2020 | 118000 ELECTRICAL SYSTEM:SOFTWARE |
| TOYOTA | COROLLA HATCHBACK | 2020 | 353000 EQUIPMENT:ELECTRICAL |
| TOYOTA | RAV4 | 2020 | 353000 EQUIPMENT:ELECTRICAL |
| TOYOTA | RAV4 | 2020 | 118000 ELECTRICAL SYSTEM:SOFTWARE |
| TOYOTA | RAV4 HYBRID | 2020 | 118000 ELECTRICAL SYSTEM:SOFTWARE |
| TOYOTA | RAV4 HYBRID | 2020 | 353000 EQUIPMENT:ELECTRICAL |
Related TOYOTA Recalls
What Should You Do?
If your vehicle is affected by this TSB, contact your authorized TOYOTA dealer. Bring this bulletin ID (T-TT-0678-21 Rev) when you visit. If under warranty, the repair should be free. If your warranty has expired, ask about goodwill coverage — manufacturers sometimes cover TSB-related repairs beyond the warranty period.
Frequently Asked Questions
A recall is a mandatory safety fix — the manufacturer must repair every affected vehicle for free. A TSB is an advisory document that describes a known issue and the recommended fix, but repairs are not required. However, some TSBs eventually lead to recalls if the issue poses a safety risk. TSBs are generally issued for quality or performance problems, while recalls address safety defects.
If your vehicle is still under the manufacturer's warranty, TSB-related repairs are typically covered at no cost. If your warranty has expired, you can ask the dealer about goodwill or customer assistance programs. Many manufacturers will cover or partially cover repairs for well-known issues, especially if the TSB was issued recently or affects a large number of vehicles.
Check the make, model, and model year listed above against your vehicle. If they match, this bulletin likely applies. However, TSBs may only affect vehicles with specific production dates, VIN ranges, or configurations. Your dealer can confirm by entering your VIN into their service system, which will show all applicable TSBs and recalls.
This data comes from the National Highway Traffic Safety Administration (NHTSA). Manufacturers are required to submit copies of all communications (including TSBs) sent to their dealers to NHTSA. The agency makes this data publicly available as part of its vehicle safety monitoring program.