# Service bulletin T\-SB\-0120\-20 Rev2

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.

- Type: Service bulletin
- NHTSA id: 11003640
- Published by NHTSA: 2024\-07\-06
- Manufacturer's number: T\-SB\-0120\-20 Rev2
- Manufacturer's date: 2024\-04\-15
- Campaign id or software version: T\-SB\-0120\-20
- NHTSA component: ENGINE; ELECTRICAL SYSTEM

## NHTSA's summary

Some 2021 – 2024 model year Toyota vehicles may require the download and installation of vehicle specific software or configuration software when the Electronic Control Unit \(ECU\) is replaced. GTS\+ software has been modified to indicate when configuration software is required. A new Configure column has been added to the GTS\+ Health Check Results screen to show when configuration software is available for a specific ECU. REVISION NOTICE April 18, 2024 Rev2: •Applicability has been updated to include 2024 model year Tundra, Tundra Hybrid, Venza Hybrid, bZ4X, Corolla, Corolla Cross, Corolla Cross Hybrid, Corolla Hybrid, Crown, GR Corolla, Corolla Hatchback, Prius, Prius Prime, Sequoia Hybrid, Highlander, Grand Highlander, Grand Highlander Hybrid, Land Cruiser, Tacoma, Tacoma Hybrid, and Mirai vehicles and 2023 model year Corolla Hatchback and Prius Prime vehicles. •The Introduction section has been updated. •The Operation Procedure section has been removed. •The Standard ECU Configuration Procedure and ECU Configuration Value Writing Procedure sections have been added.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2024/MC-11003640-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2024/MC-11003640-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Electrical system, Engine

## Vehicles listed

- 2023 to 2024 TOYOTA BZ4X
- 2023 to 2024 TOYOTA COROLLA
- 2023 to 2024 TOYOTA COROLLA CROSS
- 2023 to 2024 TOYOTA COROLLA CROSS HYBRID
- 2023 to 2024 TOYOTA COROLLA HATCHBACK
- 2023 to 2024 TOYOTA COROLLA HYBRID
- 2023 to 2024 TOYOTA CROWN
- 2023 to 2024 TOYOTA GR COROLLA
- 2024 TOYOTA GRAND HIGHLANDER
- 2024 TOYOTA GRAND HIGHLANDER HYBRID
- 2024 TOYOTA HIGHLANDER HYBRID
- 2024 TOYOTA MIRAI
- 2023 to 2024 TOYOTA PRIUS
- 2023 to 2024 TOYOTA PRIUS PRIME
- 2023 to 2024 TOYOTA SEQUOIA HYBRID
- 2024 TOYOTA TACOMA
- 2024 TOYOTA TACOMA HYBRID
- 2022 to 2024 TOYOTA TUNDRA
- 2022 to 2024 TOYOTA TUNDRA HYBRID
- 2021 to 2024 TOYOTA VENZA HYBRID
- 2024 TOYOTA redundant LAND CRUISER

## Recalls for the same vehicles and component

- [26V341000](/recalls/nhtsa/26V341000.md), 2026-05-27: ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL
- [2026241](/recalls/tc/2026241.md), 2026-05-20: Engine
- [26V320000](/recalls/nhtsa/26V320000.md), 2026-05-20: ENGINE AND ENGINE COOLING:ENGINE:HARD PARTS INTERNAL/MECHANICAL
- [26V049000](/recalls/nhtsa/26V049000.md), 2026-01-28: ELECTRICAL SYSTEM:WIRING:SWITCHES/KNOBS/BUTTONS; LATCHES/LOCKS/LINKAGES:DOORS:LATCH
- [2025614](/recalls/tc/2025614.md), 2025-11-06: Engine
- [25V767000](/recalls/nhtsa/25V767000.md), 2025-11-06: ENGINE AND ENGINE COOLING:ENGINE:HARD PARTS INTERNAL/MECHANICAL
- [25V595000](/recalls/nhtsa/25V595000.md), 2025-09-11: ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL
- [2024304](/recalls/tc/2024304.md), 2024-05-30: Engine
- [24V381000](/recalls/nhtsa/24V381000.md), 2024-05-30: ENGINE AND ENGINE COOLING:ENGINE:HARD PARTS INTERNAL/MECHANICAL
- [2024228](/recalls/tc/2024228.md), 2024-04-17: Electrical

## Other bulletins for the same vehicles and component

- [26TC01](/bulletins/11038372.md), 2026-10-08, Service bulletin: ELECTRICAL SYSTEM. TECHNICAL INSTRUCTIONS FOR SPECIAL SERVICE CAMPAIGN 26TC01 POWER DISTRIBUTION BOX CERTAIN 2024 – 2025 MODEL YEAR PRIUS 2024 MODEL YEAR PRIUS PHV
- [26TC01](/bulletins/11038370.md), 2026-10-08, Service campaign: ELECTRICAL SYSTEM. An electrical connection for the rear window defogger may not have been installed correctly during vehicle assembly. Overtime, this can cause the rear window defogger to become inoperable, which could reduce visibility through the rear window when moisture or condensation is present
- [T\-SB\-0110\-20 Rev2](/bulletins/11037202.md), 2026-09-09, Service bulletin: ENGINE. OBSOLETE NOTICE August 20, 2026: This bulletin is now obsolete. Please see T\-SB\-0051\-26.
- [T\-SB\-0051\-26](/bulletins/11037201.md), 2026-09-09, Service bulletin: ENGINE. This bulletin includes basic procedures for performing a rescue charge at battery on high voltage \(HV\) Ni\-MH and Li\-ion batteries.
- [24TE04](/bulletins/11037186.md), 2026-09-09, Warranty extension: ENGINE. Although the flow shut\-off valve is covered by Toyota’s New Vehicle Limited Warranty for 36 months or 36,000 miles \(whichever comes first\), we at Toyota care about the customers’ ownership experience. Toyota is providing coverage for repairs related to Flow Shut\-off Valve Coolant Leak.
- [26TC02](/bulletins/11034825.md), 2026-07-08, Service bulletin: ELECTRICAL SYSTEM. TECHNICAL INSTRUCTIONS FOR SPECIAL SERVICE CAMPAIGN 26TC02 REPROGRAMMING FOR PARKING ASSIST ECU CERTAIN 2023 \- 2024 SEQUOIA
- [26TC02](/bulletins/11034824.md), 2026-07-08, Service bulletin: ELECTRICAL SYSTEM. TECHNICAL INSTRUCTIONS FOR SPECIAL SERVICE CAMPAIGN 26TC02 REPROGRAMMING FOR PARKING ASSIST ECU CERTAIN 2022 \- 2024 TUNDRA / TUNDRA HYBRID
- [22TE09](/bulletins/11033412.md), 2026-06-04, Warranty extension: ELECTRICAL SYSTEM. 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.
- [26TE03](/bulletins/11033404.md), 2026-06-04, Warranty extension: ENGINE. Although the Mirai Electric Heater Assemblies are 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. Under this program, Toyota is providing additional coverage for repairs related to Mirai electric heater assembly potentially becoming inoperative.
- [26TE03](/bulletins/11033403.md), 2026-06-04, Service bulletin: ENGINE. TECHNICAL INSTRUCTIONS FOR 26TE03 ELECTRIC HEATER SUB\-ASSEMBLY REPLACEMENT CERTAIN 2021 \- 2024 MIRAI

JSON: [/v1/bulletins/11003640](/v1/bulletins/11003640)

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