# Service bulletin 22TC11\-bZ4X

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: 10228593
- Published by NHTSA: 2023\-01\-03
- Manufacturer's number: 22TC11\-bZ4X
- Manufacturer's date: 2022\-11\-02
- NHTSA component: ELECTRICAL SYSTEM

## NHTSA's summary

RL: A software update has been developed for certain 2023 model year bZ4X vehicles. Included in the update is an improvement of DC charging performance during low temperatures.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2022/MC-10228593-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2022/MC-10228593-9999.pdf)

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

## Components

Electrical system

## Vehicles listed

- 2023 TOYOTA BZ4X

## Other bulletins for the same vehicles and component

- [T\-SB\-0058\-23 Rev1](/bulletins/11020657.md), 2025-07-10, Service campaign: ELECTRICAL SYSTEM. The air conditioning dye injection tool kit has been developed to aid in identifying the location of air conditioning refrigerant leaks. The procedures outlined in this Service Bulletin aid in locating, inspecting, and repairing refrigerant leaks.
- [T\-TT\-0779\-25](/bulletins/11019331.md), 2025-06-06, Service bulletin: ELECTRICAL SYSTEM. To assist with the early detection and early resolution of audio related concerns you may be asked to recover MMR data from the head unit. The following steps are instructions on how to retrieve the data from the system and are only to be used when requested by FTS and/or FPE.
- [T\-TT\-0779\-25](/bulletins/11018328.md), 2025-05-15, Service bulletin: ELECTRICAL SYSTEM. To assist with the early detection and early resolution of audio related concerns you may be asked to recover MMR data from the head unit. The following steps are instructions on how to retrieve the data from the system and are only to be used when requested by FTS and/or FPE.
- [T\-SB\-0013\-24 Rev1](/bulletins/11016781.md), 2025-04-08, Service bulletin: ELECTRICAL SYSTEM. The Immobilizer and Smart Key Reset is a feature that allows the registration of new keys when all master keys are lost. Once the system is reset, all previously registered keys will be erased and can never be reused. Another feature, Add/Remove Key, is also available. Once a key is removed, it can never be reused.
- [T\-SB\-0013\-24 Rev1](/bulletins/11015495.md), 2025-03-11, Service bulletin: ELECTRICAL SYSTEM. The Immobilizer and Smart Key Reset is a feature that allows the registration of new keys when all master keys are lost. Once the system is reset, all previously registered keys will be erased and can never be reused. Another feature, Add/Remove Key, is also available. Once a key is removed, it can never be reused.
- [T\-SB\-0120\-20 Rev2](/bulletins/11014211.md), 2025-02-12, Service bulletin: ELECTRICAL SYSTEM. OBSOLETE NOTICE January 30, 2025: This bulletin is now obsolete. Please see T\-SB\-0015\-25.
- [T\-SB\-0015\-25](/bulletins/11014209.md), 2025-02-12, Service bulletin: ELECTRICAL SYSTEM. Some 2021 – 2025 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.
- [T\-SB\-0111\-20 Rev2](/bulletins/11014193.md), 2025-02-12, Service bulletin: ELECTRICAL SYSTEM. OBSOLETE NOTICE January 23, 2025: This bulletin is now obsolete. Please see T\-SB\-0011\-25.
- [T\-SB\-0011\-25](/bulletins/11014190.md), 2025-02-12, Service bulletin: ELECTRICAL SYSTEM. When certain vehicle ECUs are replaced, the ECU Security Key must be written in order for that ECU to communicate on the vehicle network. The GTS\+ Software Health Check Results screen has been enhanced to help identify if a replacement ECU requires an ECU Security Key.
- [T\-SB\-0120\-20 Rev2](/bulletins/11003640.md), 2024-07-06, Service bulletin: ENGINE; ELECTRICAL SYSTEM. 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.

JSON: [/v1/bulletins/10228593](/v1/bulletins/10228593)

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