TECHNICAL INSTRUCTIONS
FOR
SPECIAL SERVICE CAMPAIGN 23TC02
BRAKE ECU REPROGRAM
CERTAIN 2023 MODEL YEAR COROLLA HV

The repair quality of covered vehicles is extremely important to Toyota. All dealership technicians
performing this recall 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 repair
performed correctly; technicians performing this repair are required to complete the following course:
•

TIC206A – Electrical Repair 1

It is the dealership’s responsibility to select technicians that have completed the above courses to
perform this repair. Carefully review your resources, the technician skill level, and ability before
assigning technicians to this repair. It is important to consider technician days off and vacation
schedules to ensure there are properly trained technicians available to perform this repair at all times.

I.
•
•

OPERATION FLOW CHART
Verify Vehicle Eligibility
Confirm vehicle VIN matches the RO
Check for Campaign eligibility using TIS

No Further Action Required

Not Covered

Covered

Perform Health Check. Is a Update Available For The
Skid Control ECU?

No

Yes

Campaign completed, return the vehicle to the
customer.

Update the Skid Control ECU CID.

II. IDENTIFICATION OF AFFECTED VEHICLES
1. CHECK VEHICLE FOR CAMPAIGN ELIGIBILITY
a. Compare the vehicles VIN to the VIN listed on the Repair Order to ensure they match.
b. Check the TIS Vehicle Inquiry System to confirm the VIN is involved in this Campaign, and
that it has not already been completed.
Note: TMNA warranty will not reimburse dealers for repairs completed on vehicles that are not
affected or were previously completed, even by another dealer.

III. PREPARATION
A.
•

TOOLS & EQUIPMENT

Techstream or GTS

•

Standard Hand Tools

•

DCA-8000 Battery Diagnostic Station

2

IV. BACKGROUND
Due to certain programming in the brake ECU, under certain conditions, DTC U0100 is stored and cannot be
cleared even though a technician attempts to clears it. This condition does not affect the vehicle operation.

V.

SAFETY PRECAUTIONS
CRITICAL INFORMATION - READ THOROUGHLY
An ECU could be damaged if an error occurs in the communication while reprogramming the ECU. Confirm all
work is performed as described in these instructions.

1. STABILIZE THE POWER TO THE PERSONAL COMPUTER SIDE
a) Be sure to connect the personal computer to an external AC power
supply.
NOTICE:
The ECU could be damaged if the battery voltage of the personal
computer drops while reprogramming.
b)

Turn off the screen saver and power saving mode of the personal
computer so that the power to the hard disk is kept supplied.

NOTICE:
If the screen saver or power saving mode launches while
reprogramming, the communication may be disconnected, resulting in
the damage of the ECU.

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c)

DO NOT block the ventilation opening for the cooling fan of the
personal computer.

NOTICE:
If the ventilation opening for the cooling fan is blocked with a sheet
cover or the like, the personal computer may be heated excessively,
causing the operation of the personal computer to stop.
Due to the stop of the operation, the communication for reprogramming
signals could be stopped, resulting in the damage of the ECU.

VI.

BRAKE ECU CALIBRATION ID VERIFICATION
CHECK FOR DTC’S
a) Using a Techstream, perform a Health Check to check for
any Diagnostic Trouble Codes.

1.

NOTICE:
This Campaign covers only the software update to the Brake
ECU, as detailed in these instructions. It does not cover the
diagnosis or replacement of any other systems on the vehicle.
2. CONFIRM THE BRAKE ECU CALIBRATION ID
a. Confirm the current calibration ID in the brake ECU.

Brake ECU Calibrations
Current Calibration ID

Model
Corolla HV

F152612D1300

Yes

Proceed to section VII. Vehicle
preparation on p.5

Is there an update available for
the Brake ECU System?

New Calibration ID

F152612D1400

No

Campaign complete. Return the
vehicle to the customer.

4

VII. VEHICLE PREPERATION

1. VEHICLE PREPARATION
a. Confirm the following conditions:
• Vehicle in the IG
position (engine off).
• Transaxle in Park.
• Parking brake engaged.

• Turn off all electrical accessories (i.e. climate
control, audio system, etc.)
• Headlight switch in the DRL OFF position.
• Windshield wiper switch in the OFF position.

1. PRESSURIZE HYDRO-BOOSTER
a. Apply the parking brake while IG ON and at the P
position.
b. Depress the brake pedal twice fully within 2
seconds, then release the pedal.
Notice: Pressurize the hydro-booster to the maximum before
reprogramming, as the battery voltage decreases if the oil
pressure of the hydro-booster lowers and the pump rotates
during reprogramming.
3. CONNECT THE 12V BATTERY TO A POWER SUPPLY (DCA-8000)
a) Connect the DCA-8000 or other type of a power supply (not a battery charger) to the 12 V battery.
b) Tap the Reflash icon from the Main Menu screen of the DCA-8000.
A power supply MUST be used during reprogramming. Please ensure DCA-8000 is connected and set
to power supply mode. Voltage MUST be set to 13.5V.
Power supply must be connected directly to the 12v battery terminals and NOT the remote jump
posts under the hood (if equipped).
ECU damage will occur if the battery voltage is not properly maintained during this re-flash
procedure.

4. VERIFY TECHSTREAM SETUP
a) Verify that the Techstream meets the following conditions:
• The latest version of software is loaded.
• The Techstream battery is fully charged. If not, connect the Techstream to a 120 V source.
• The DLCIII cable is in good condition.
The Techstream’s battery voltage must also be maintained during the re-flash procedure. If
necessary, plug the Techstream into a 120v outlet during this procedure.
If the Techstream communication with the vehicle fails during the re-flash procedure, the Hybrid
Vehicle Control ECU will be damaged.

5

VIII. UPDATE CALIBRATION

1. REFLASH THE BRAKE ECU
a. Click yes on the health check results screen, or follow the link on the table above to
begin the reflash process.

NOTICE:
Reflash failure should be extremely rare and can be avoided by following all instructions and reprogramming best
practices.

2. LAUNCH CALIBRATION WIZARD
Select “Next”

3. SELECT A DEVICE TOOL
Select “Next”

4. CONFIRM THAT "NEW CAL ID" IS CORRECT, AND
THEN CLICK ON “NEXT”.
Note: If the incorrect CAL ID file is selected it is not
possible to move onto the re calibration.

6

5. TURN THE IGNITION OFF, THEN CLICK “NEXT”

6. FOLLOW THE ON-SCREEN INSTRUCTIONS AND
CONFIRM THE FOLLOWING, THEN CLICK “NEXT”
PC is connected to VIM.
Ignition is ON and engine is OFF
Hood is open.
All accessories are OFF
Battery voltage is above 11.8V

7. PERFORM SECURITY SIGNATURE TO THE SERVER
THEN HIT “NEXT”
a. Follow the instructions on screen
Hint: The reprogramming will not begin without the security
signature.
8. LOGIN TO TIS
a. Input TIS login credentials and select “Login”
Note: This step requires internet.

9. PERFORM SECURITY SIGNATURE TO THE SERVER
a. Input TIS login credentials and select “Login”.

7

10. PERFORM SECURITY SIGNATURE TO THE SERVER
a. Select “Send”

11. COPY SIGNATURE FROM TIS
b. Select “Copy to Clipboard”

12. PASTE SIGNATURE INTO TECHSTREAM, THEN
SELECT “NEXT”

13. RECALIBRATION WILL NOW BEGIN
Do Not disturb the vehicle during flash reprogramming.

8

14. RECALIBRATION FINISHED
a. The following Screens will appear at the end of the
reflash.

15. TURN THE IGNITION OFF FOR A MINIMUM OF 10
SECONDS, THEN CLICK “NEXT”

16. TURN THE IGNITION TO THE ON POSITION, THEN CLICK
“NEXT”

Notice for Hybrid Models: DO NOT turn the IG ON
with the brake pedal depressed.

17. CONFIRM CALIBRATIONS WERE SUCCESSFULLY
UPDATED THEN CLICK “FINISH”

9

18. PERFORM VERIFICATION HEALTH CHECK

a. Using a Techstream, perform a Health Check
b. Clear DTC’s that may have set during the re-flash
procedure.
c. Re-run the Health Check to confirm that no DTC’s
reappear.
THIS VERIFICATION HEALTH CHECK IS
NECESSARY to update the results and CID’s to
the National database.

19. COMPLETE HEALTH CHECK AND CONFIRM CID UPDATE

a. On the Stored Data tab, confirm the following for the Combination Meter System:
• The calibration number has the “New CID” number.
• The Update column lists “No”

20. PRINT CUSTOMER HEALTH CHECK REPORT
a. From the Stored Data tab, select the Customer Health Check Report button (TIS will launch when button is
pressed).

a)
b)
c)
d)

Log in to TIS.
Input Vehicle Mileage and Repair Order number.
Check the “Performed” campaign button for campaign 22TD05.
Select the Report button.

10

e)
f)
g)

Confirm Customer Health Check Report information is correct.
Print Customer Health Check Report from TIS.
Sign and provide to the customer.

◄ VERIFY REPAIR QUALITY ►

− Confirm the Brake ECU Calibration has been updated successfully to the NEW CID.
− Confirm there are no DTC’s after the Calibration update.
− If you have any questions regarding this Campaign, please contact your regional
representative

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VIII. APPENDIX
A. CAMPAIGN DESIGNATION DECORDER

23TC02
23

T

C

02

Year Campaign
is Launched

Vehicle Make

Field Action Category and Phase

Field Action Sequence

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

T = Toyota
L = Lexus

A = Safety Recall Remedy
B = Safety Recall Interim
C = Special Service Campaign
D = Limited Service Campaign
E = Customer Support Program
F = Emissions Recall
(May use other characters in unique cases)

01 = 1st Field Action of the year
02 = 2nd Field Action of the year
03 = 3rd Field Action of the year
(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, Special Service Campaign, 2nd Special Service Campaign Launched in 2020
21TE05 = Launched in 2021, Customer Support Program, 5th Customer Support Program Launched in
2021

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