◄ IMPORTANT UPDATE ►
The attached Dealer Letter + FAQ have been updated. Refer to the details below.
DATE
10/05/2023

TOPIC
This Software Update has been expanded to include additional VINs.

The most recent update in the attached Dealer Letter + FAQ will be highlighted with a red box.

Please review this notification with your staff to ensure that all relevant personnel have been briefed regarding
this subject.
Thank you for your cooperation.

© 2023 Toyota Motor Sales, USA

Toyota Motor Sales, USA, Inc.
6565 Headquarters Drive
Plano, TX 75024
(469) 292-4000
Original Publication Date: July 27, 2023
To:

All Toyota Dealer Principals, General Managers, Service Managers, and Parts Managers

SOFTWARE UPDATE 23TC05
Certain 2023 Model Year bZ4X
EV Charging Performance + Display Software Update
Model / Years
2WD bZ4X / 2023
AWD bZ4X / 2023

Production Period
Late October 2021 – Early August 2023
Mid November 2021 – Early August 2023

Approximate Total Vehicles
3100
6600

Condition
A software update has been developed for certain 2023 model year bZ4X vehicles. It is designed to improve
DC-charging performance, and enhance visualization of the remaining range, current state of charge (SOC),
and real-life energy consumption.
Software Update
Any authorized Toyota dealer will perform the software update on the involved vehicles FREE OF CHARGE.
Covered Vehicles
There are approximately 9,600 vehicles covered by this Software Update. None of the vehicles involved in this
Software Update were distributed to Puerto Rico.
Owner Notification Date
Toyota will begin to notify owners in late July 2023 via head unit messaging followed by direct mailing. A
sample of the owner letter has been included for your reference.

Toyota makes significant effort to obtain current customer name and address information from each state
through industry resources when mailing owner letters. In the event your dealership receives a notice for a
vehicle that was sold prior to the Software Update announcement, it is the dealership’s responsibility to
forward the owner letter to the customer who purchased the vehicle.
Please note that only owners of the covered vehicles will be notified. If you are contacted by an owner who
has not yet received a notification, please verify eligibility by confirming through TIS prior to performing
repairs. Dealers should perform the repair as outlined in the Technical Instructions found on TIS.

© 2023 Toyota Motor Sales, USA

23TC05 Software Update - D - Page |2

Dealer Inventory Procedures
New and Used Vehicles in Dealership Inventory (In-Stock Vehicles)
To ensure customer satisfaction, Toyota requests that dealers complete this Software Update on any new or
used vehicles currently in dealer inventory that are covered by this Software Update prior to customer delivery.
NOTE: Dealers can identify if any of their new and used inventory has any open campaigns in the Vehicle
Inventory Summary available in Dealer Daily (Non SET and GST dealers: https://dealerdaily.toyota.com/). The
Vehicle Inventory Summary may take up to 4 hours to populate information for newly launched campaigns.
Toyota Certified Used Vehicle (TCUV)
The TCUV policy prohibits the certification of any vehicle with an outstanding Safety Recall, Software Update,
or Limited Service Campaign. Thus, no affected units are to be designated, sold, or delivered as a TCUV until
all applicable Safety Recalls, Software Updates, and Limited Service Campaigns have been completed on that
vehicle.

Customer Handling and Software Update Procedure
Customer Contacts
Customers who receive the owner letter may contact your dealership with questions regarding the letter
and/or the Software Update. Please welcome them to your dealership and answer any questions that they
may have. A Q&A is provided to assure a consistent message is communicated.
Customers with additional questions or concerns are asked to please contact the Toyota Customer Experience
Center (1-888-270-9371) - Monday through Friday, 7:00 am to 7:00 pm, Saturday 7:00 am to 4:30 pm Central
Time.
Salvage Title Vehicles
Every attempt should be made to complete an open Software Update when circumstances permit, unless
noted otherwise in the SSC dealer letter.
For complete details on this policy, refer to Toyota Warranty Policy 4.17, “What Is Not Covered by The Toyota
New Vehicle Limited Warranty”.
Media Contacts
It is imperative that all media contacts (local and national) receive a consistent message. In this regard, all
media contacts must be directed to Joshua Burns, (469) 292-6449 in Toyota Corporate Communications.
Please do not provide this number to customers. Please provide this contact only to media.

© 2023 Toyota Motor Sales, USA

23TC05 Software Update - D - Page |3

Technician Training Requirements
The software update quality of covered vehicles is extremely important to Toyota. All dealership technicians
performing this update are required to successfully complete the most current version of the E-Learning
course “Safety Recall and Service Campaign Essentials”. To ensure that all vehicles have the update performed
correctly; technicians performing this update are required to have completed the following courses :
• TIC206A - Electrical Repair 1
• TEC100E – GTS+ Level 1
Always check which technicians can perform the update by logging on to https://www.uotdealerreports.com.
It is the dealership’s responsibility to select technicians who have completed the courses above. Carefully
review your resources, the technician skill level, and ability before assigning technicians to this update. It is
important to consider technician days off and vacation schedules to ensure there are properly trained
technicians available to perform this update at all times.
Software Update Procedures
Refer to TIS for Technical Instructions on the software update. Conduct all non-completed Safety Recalls and
Service Campaigns on the vehicle during the time of appointment.
Software Update Confirmation
The software update quality of covered vehicles is extremely important to Toyota. To help ensure that all
vehicles have the complete software update, please designate at least one associate (someone other than
the individual who performed the update) to verify the update has been completed on all applicable ECUs of
prior to customer delivery.

© 2023 Toyota Motor Sales, USA

23TC05 Software Update - D - Page |4

Warranty Reimbursement Procedures
Warranty Reimbursement Procedure

The flow chart is for reference only. DO NOT use it in place of the full technical instructions.
Follow ALL steps as outlined in the full technical instructions to confirm the update is completed
correctly.

Verify Vehicle Eligibility
1. Confirm vehicle VIN matches the RO.
2. Check Vehicle Inquiry System for
software update eligibility.

No further action required.

Not Covered

Perform Health Check using GTS+ ONLY

Is the vehicle FWD or AWD?
FWD

AWD

FWD = Check 6 ECUs

AWD = Check 7 ECUs

Is there a Calibration Update available for any of the ECUs identified in the
Affected ECUs table (Technical Instructions) under CURRENT
CALIBRATION ID?

YES

Update each ECU one by one

Update complete.
Return the vehicle to the customer.

© 2023 Toyota Motor Sales, USA

NO

23TC05 Software Update - D - Page |5

Op Code
23TC05R1
•

Description
Reprogram ECUs with Software Updates

Flat Rate Hours
1.9

The flat rate times include 0.1 hours for administrative cost per unit for the dealership.

Claim Filing Accuracy and Correction Requests
It is the dealer’s responsibility to file claims correctly for this Software Update. This claim filing information is
used by Toyota for various government reporting activities; therefore, claim filing accuracy is crucial. If it has
been identified that a claim has been filed using an incorrect Op Code or a claim has been filed for an incorrect
VIN, refer to Warranty Procedure Bulletin PRO17-03 to correct the claim.

Software Update Designation / Phase Decoder

23TC05
23

T

C

05

Year Campaign
is Launched

Vehicle Make

Field Action Category and Phase

Field Action Sequence

A = Safety Recall Remedy
B = Safety Recall Interim
C = Special Service Campaign
D = Limited Service Campaign
E = Customer Support Program
F = Emissions Recall

01 = 1 st Field Action of the year
02 = 2nd Field Action of the year
03 = 3rd Field Action of the year

19 = 2019
20 = 2020
21 = 2021
22 = 2022
23 = 2023
Etc...

T = Toyota
L = Lexus

(May use other characters in unique
cases)

(The sequence is unique for each
Field Action category)
(May use other characters in
unique cases)

Examples:
19TA01 = Launched in 2019, Toyota, Safety Recall Remedy Phase, 1st Safety Recall Launched in 2019
20TC02 = Launched in 2020, Software Update, 2nd Software Update Launched in 2020
21TE05 = Launched in 2021, Customer Support Program, 5th Customer Support Program Launched in 2021

Please review this entire package with your Service and Parts staff to familiarize them with the proper stepby-step procedures required to implement this Software Update.
Thank you for your cooperation.
TOYOTA MOTOR SALES, U.S.A., INC.

© 2023 Toyota Motor Sales, USA

SOFTWARE UPDATE 23TC05
Certain 2023 Model Year bZ4X
EV Charging Performance + Display Software Update
Frequently Asked Questions
Original Publication Date: July 27, 2023

Q1:

What does the software update do?

A1:

A software update has been developed for certain 2023 model year bZ4X vehicles. It is designed to
improve DC-charging performance, and enhance visualization of the remaining range, current state
of charge (SOC), and real-life energy consumption.

Q1a:

How will I know if my car has been updated?
A1a:

After the update is performed, the multi-information screen will display the state of charge of
the traction battery in a percentage. This visual indicator will be shown directly under the
remaining range.

Before software update

After software update

Q2:

What is Toyota going to do?

A2:

Starting in July 2023, Toyota will send an owner notification advising owners to make an appointment
with their authorized Toyota dealer to perform a software update FREE OF CHARGE.

Q3:

I previously received a letter and/or an in-vehicle head unit message from Toyota regarding a software
update for my vehicle. Do I still need to get that update completed?

A3:

The previous software update designated Special Service Campaign 22TC11 is included in this software
update. If your vehicle was involved in 22TC11 and you have not already had 22TC11 performed on your
vehicle, 23TC05 will resolve and close 22TC11.

FAQ Page 1 of 2
© 2023 Toyota Motor Sales, USA

Q3a:

What if I already had the software update for Special Service Campaign 22TC11 performed on
my vehicle?

A3a:

Even if you have already had Special Service Campaign 22TC11 performed on your vehicle,
please contact your authorized Toyota dealer to make an appointment to have the Software
Update 23TC05 update performed.

Q4:

Which and how many vehicles are covered by this Software Update?

A4:

There are approximately 9,600 vehicles covered by this Software Update.
Model Name

Model Year

bZ4X 2WD

2023

bZ4X 4WD

2023

Production Period

.

Late October 2021 – Early August 2023
Mid November 2021 – Early August 2023

Q5:

How long will the software update take?

A5:

The software update will take approximately two hours to complete. However, depending on the
dealer’s work schedule, it may be necessary to make your vehicle available for a longer period of time.

Q6:

How does Toyota obtain my mailing information?

A6:

Toyota uses an industry provider who works with each state’s Department of Motor Vehicles (DMV) to
receive registration or title information, based upon the DMV records. Please make sure your
registration or title information is correct.

Q7:

What if I have additional questions or concerns?

A7:

If you have additional questions or concerns, please contact the Toyota Brand Engagement Center at
1-888-270-9371 Monday through Friday, 8:00 am to 8:00 pm, Saturday 9:00 am to 7:00 pm Eastern
Time.

FAQ Page 2 of 2
© 2023 Toyota Motor Sales, USA

TOYOTA
2023 Model Year bZ4X
EV Charging Performance + Display Software Update
Software Update
[VIN]

E

Dear Toyota Customer:
At Toyota, we are dedicated to providing vehicles of outstanding quality and value. As part of our continuing
efforts to provide superior customer satisfaction, Toyota is announcing a Software Update, which includes
your vehicle.

PL

You received this notice because our records, which are based primarily on state registration and title data,
indicate that you are the current owner.
What will the software update do?
A software update has been developed for certain 2023 model year bZ4X vehicles. It is designed to improve
DC-charging performance, and enhance visualization of the remaining range, current state of charge (SOC),
and real-life energy consumption.

M

What will Toyota do?
Any authorized Toyota dealer will perform the software update on your vehicle FREE OF CHARGE.

What should you do?

Make an appointment at any authorized Toyota dealer to have the update performed on your vehicle
FREE OF CHARGE to you.

SA

The software update will take approximately two hours to complete. However, depending on the
dealer’s work schedule, it may be necessary to make your vehicle available for a longer period of time.

What if you have other questions?
•
•
•

Your local Toyota dealer will be more than happy to answer any of your questions.
For more information on this and other campaigns, please visit www.toyota.com/recall.
If you require further assistance, you may contact the Toyota Brand Engagement Center at 1-888-270-9371
Monday through Friday, 8:00 am to 8:00 pm, Saturday 9:00 am to 7:00 pm Eastern Time.

If you would like to update your vehicle ownership or contact information, please visit
https://www.toyota.com/recall/update-info-toyota. You will need your full 17-digit Vehicle Identification
Number (VIN) to input the new information.
If you are a vehicle lessor, please assist us by forwarding this notice to the lessee.

We have sent this notice in the interest of your continued satisfaction with our products, and we sincerely
regret any inconvenience this condition may have caused you.
Thank you for driving a Toyota.
Sincerely,

SA

M

PL

E

TOYOTA MOTOR SALES, U.S.A., INC.