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Service bulletin T-TT-0593-20 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 id10207958
Published by NHTSA2022-02-14
Manufacturer's numberT-TT-0593-20 Rev
Manufacturer's date2022-01-20
NHTSA componentELECTRICAL SYSTEM:ADAS:DRIVER MONITORING:SOFTWARE; ELECTRICAL SYSTEM

NHTSA's summary

TT: Some customers may experience the inability to activate Remote Connect or Remote Connect becoming inoperative when attempting to send commands to the vehicle. To simplify the diagnosis of this system and prevent the unnecessary replacement of parts, please refer to the procedure below.

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

Driver assistance, Electrical system

Vehicles listed
TOYOTA 4RUNNER2020, 2021, 2022
TOYOTA AVALON2021, 2022
TOYOTA AVALON HYBRID2021, 2022 (the catalog's model; the bulletin names a series or trim of it)
TOYOTA C-HR2020, 2021, 2022
TOYOTA CAMRY2020, 2021, 2022
TOYOTA CAMRY HYBRID2021, 2022 (the catalog's model; the bulletin names a series or trim of it)
TOYOTA COROLLA2021, 2022
TOYOTA COROLLA HATCHBACK2021 (the catalog's model; the bulletin names a series or trim of it)
TOYOTA COROLLA HYBRID2021, 2022 (the catalog's model; the bulletin names a series or trim of it)
TOYOTA HIGHLANDER2020, 2021, 2022
TOYOTA HIGHLANDER HYBRID2021, 2022 (the catalog's model; the bulletin names a series or trim of it)
TOYOTA PRIUS2021, 2022
TOYOTA PRIUS PRIME2021, 2022 (the catalog's model; the bulletin names a series or trim of it)
TOYOTA RAV42020, 2021, 2022
TOYOTA RAV4 HYBRID2021, 2022 (the catalog's model; the bulletin names a series or trim of it)
TOYOTA RAV4 PRIME2021 (the catalog's model; the bulletin names a series or trim of it)
TOYOTA SEQUOIA2020, 2021, 2022
TOYOTA SIENNA HYBRID2021, 2022 (the catalog's model; the bulletin names a series or trim of it)
TOYOTA TACOMA2020, 2021, 2022
TOYOTA TUNDRA2020, 2021, 2022
TOYOTA VENZA HYBRID2021, 2022 (the catalog's model; the bulletin names a series or trim of it)
TOYOTA redundant SIENNA2021 to 2022
TOYOTA redundant VENZA2021

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

Recalls for the same vehicles and component
25V6570002025-10-01. BACK OVER PREVENTION:SOFTWARE
20233822023-07-12. Electrical
23V4780002023-07-12. ELECTRICAL SYSTEM:PROPULSION SYSTEM:DC/DC CONVERTER
23V1110002023-02-22. ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL
23V0410002023-02-02. ELECTRICAL SYSTEM:PROPULSION SYSTEM:HYBRID MANAGEMENT:POWER CONTROL UNIT/MODULE (HPCU)
22V5010002022-07-13. BACK OVER PREVENTION:DISPLAY FUNCTION; ELECTRICAL SYSTEM:ADAS:PARKING ASSIST:SOFTWARE
22V2850002022-04-28. BACK OVER PREVENTION:DISPLAY FUNCTION; ELECTRICAL SYSTEM:SOFTWARE
22V2390002022-04-13. ELECTRONIC STABILITY CONTROL (ESC):CONTROL MODULE:SOFTWARE
22V1070002022-02-24. FORWARD COLLISION AVOIDANCE: SENSING SYSTEM: RADAR
20217232021-11-24. Electrical

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
26TC022026-07-08. Service bulletin. TECHNICAL INSTRUCTIONS FOR SPECIAL SERVICE CAMPAIGN 26TC02 REPROGRAMMING FOR PARKING ASSIST ECU CERTAIN 2022 - 2024 TUNDRA / TUNDRA HYBRID
22TE092026-06-04. Warranty extension. Although the HV Floor Under Wire Harness and Rear Traction Motor Cable is covered by Toyota’s New Vehicle Limited Warranty for 3 years or 36,000 miles (whichever comes first), we at Toyota care about the customers’ ownership experience. Toyota is providing extended coverage under this Customer Support Program for repairs related to excessive corrosion to the wire harness connections at the Rear Motor Generator. Excessive corrosion can cause AM Radio Static during certain drive cycles, or the vehicle may not start.
26TC022026-04-08. Service campaign. SPECIAL SERVICE CAMPAIGN 26TC02 Certain 2023-2024 Model Year Sequoia HV Certain 2022 – 2023 Model Year Tundra & Tundra HV Trailer Back Up Guide Feature Inoperative Frequently Asked Questions
26TC022026-04-08. Service bulletin. TECHNICAL INSTRUCTIONS FOR SPECIAL SERVICE CAMPAIGN 26TC02 REPROGRAMMING FOR PARKING ASSIST ECU CERTAIN 2022 - 2024 TUNDRA / TUNDRA HYBRID
26TC022026-04-08. Service campaign. After calibrating a trailer and using the Trailer Backup Guide feature, subsequent use of this feature may result in a “Trailer not detected” message or a blank multimedia display that prevents the display of features such as the backup camera. The multimedia system returns to normal if the vehicle is turned off and on again with no trailer attached.
T-SB-0021-262026-04-08. Service bulletin. Some 2020 – 2024 model year Highlander and Highlander Hybrid vehicles may exhibit a condition in which the air conditioner does not cool due to a leak and/or corrosion in the rear underbody air conditioner tube and accessory assembly. The anti-corrosion material has been updated to reduce the possibility of this condition.
T-SB-0106-22 Rev22026-02-11. Service bulletin. OBSOLETE NOTICE January 30, 2026: This bulletin is now obsolete. Please see T-SB-0001-26.
T-SB-0001-262026-02-11. Service bulletin. Some 2018 – 2024 model year Toyota vehicles equipped with a Premium Audio with Dynamic Navigation System require a Special Service Tool (SST) USB flash drive to update the map, points of interest, and system software.
T-TT-0797-262026-02-11. Service bulletin. Some RAV4 vehicles power seat where the automatic seat adjustment by the memory function does not work.
22TE092026-02-11. Warranty extension. Although the HV Floor Under Wire Harness and Rear Traction Motor Cable is covered by Toyota’s New Vehicle Limited Warranty for 3 years or 36,000 miles (whichever comes first), we at Toyota care about the customers’ ownership experience. Toyota is providing extended coverage under this Customer Support Program for repairs related to excessive corrosion to the wire harness connections at the Rear Motor Generator. Excessive corrosion can cause AM Radio Static during certain drive cycles, or the vehicle may not start.