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TECHNICAL INSTRUCTIONS
FOR
SPECIAL SERVICE CAMPAIGN 24TC01
BRAKE ACTUATOR ASSEMBLY (SKID CONTROL ECU)
SOFTWARE UPDATE

CERTAIN 2023 MODEL COROLLA

The repair quality of covered vehicles is extremely important to Toyota. All dealership
technicians performing this SSC 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 SSC repair are required
to complete the following course:
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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 always perform this repair.

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I.

OPERATION FLOW CHART

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 campaign is completed correctly.

Verify Vehicle Eligibility
1. Confirm vehicle VIN matches the RO.
2. Check for Campaign eligibility using TIS.

Not Covered

No further action required.

Covered

Perform Health Check and Verify ECU
Calibration.
Old Calibration

Reflash the Skid Control ECU with the
NEW software.

New Calibration

Campaign completed.
Return the Vehicle to the customer.

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
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GTS+ or Techstream

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Standard Hand Tools

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DCA-8000 Battery Diagnostic Station

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IV. BACKGROUND

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.

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.

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VI. SKID CONTROL ECU CALIBRATION ID VERIFICATION
1. CHECK FOR DTCS
a) Using a Techstream, perform a Health Check to check for any
Diagnostic Trouble Codes.
NOTE:
This Campaign covers only the software update to the Skid Control
ECU, as detailed in these instructions. It does not cover the diagnosis
or replacement of any other systems on the vehicle.

2. CHECK CURRENT CALIBRATION
a) Locate the Update column for the Brake/EPB System in the Stored Data tab for this vehicle.
b) Determine the status of an available update; indicated by a YES or NO.
HINT:
If the CIDs indicate ‘Yes’, proceed with the update procedure.

Yes

Proceed to section VII. Vehicle
preparation on p.4

Is there an update available for
the Brake System?

No

Campaign complete. Return the
vehicle to the customer.

◄ CRITICAL MESSAGE ►
It is critical that T-SB-0134-16 and T-SB-0107-20 in addition to the Technical Instructions for this SSC are followed.
This TSB outlines all steps necessary to prevent reprogramming failure. Toyota will not provide reimbursement coverage
for reprogramming failures if this TSB is not followed. If you have a reprogramming failure that requires forward
recognition camera replacement and the Technical Instructions and TSB were followed correctly, please create a case
with the Technical Assistance Hotline documenting all information related to the failure. If sufficient reporting is received
related to re-flash failure, there will be consideration for reimbursement.

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

•
•
•
b)

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

When the vehicle has no “OFF position” in the light control switch:
1) Turn the IG ON.
2) Set the light control switch to the AUTO position and make sure
that the exterior lights are turned on.
3) Light up the automatic light control sensor with work light to
keep the exterior lights turned off.

2. CONNECT THE 12V BATTERY TO A POWER SUPPLY
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. ECU damage will occur if the battery
voltage is not properly maintained during this re-flash procedure.
NOTICE:
A power supply must be connected directly to the 12V battery terminals and NOT the remote jump posts
under the hood (if equipped).

3. 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 120 v outlet during this procedure.
NOTICE:
If the Techstream communication with the vehicle fails during the re-flash procedure, the forward
recognition camera will be damaged.

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VIII.
1.

UPDATE CALIBRATION

CONFIRM THE ECU CALIBRATION ID
a) Confirm the current calibration ID in the Brake/EPB System.

The calibration IDs to re-flash in this campaign are as shown in the table below.

COROLLA BRAKE/EPB CALIBRATIONS
Model

System

COROLLA

Brake/EPB

Brake/EPB Calibration ID
Current Calibration ID
New Calibration ID
F152612A5100
F152612A5400
F152612A5200
F152612A5300

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2.

REFLASH THE SKID CONTROL ECU
a) Click yes on the health check results screen or follow the links on the table above to begin the reflash
process.

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

IX. COMPLETE REPAIR
1.

DISCONNECT THE DCA-8000

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

3. 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”

3. CONFIRM CID UPDATE
a) On the Stored Data tab, confirm the following for the Brake System:
• The Calibration number has the “New CID” number.
• The Update column lists “No”

Confirm the CIDs has been updated successfully to the NEW CIDs by someone other than the
individual who performed the repair.
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PERFORM ZERO POINT CALIBRATION OF BRAKE ACTUATOR FOR RESIDUAL FLUID (ZERO POINT
CALIBRATION OF SKID CONTROL ECU MEMORY)
a) Start the engine. The brake actuator may produce a loud operating sound when the engine starts for the
first time after reprogramming.
b) The zero point calibration is complete when the brake actuator falls silent.
HINT:

4.

The skid control ECU stores the amount of the fluid inside the brake actuator in its memory, and such information will be
reset when the ECU is reprogrammed. If the memory is reset, the system rapidly drains the fluid out of the brake actuator
when the engine starts, and this may cause the brake actuator to emit a loud operating sound. The zero point calibration
is complete once the residual fluid is drained out, and the operating sound returns to normal.

5. 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).

b)
c)
d)
e)

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

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

Authorized Modification Label
1. Install the Authorized Modifications Label after the repairs have been completed. Using a permanent
marker, fill out the label and affix it to the location under the hood as indicted.

◄ VERIFY REPAIR QUALITY ►
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Confirm the Skid Control ECU Calibration has been updated successfully to the NEW CID.
Confirm there are no DTCs after the Calibration update.
If you have any questions regarding this Campaign, please contact your regional representative

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XI. APPENDIX
A. CAMPAIGN DESIGNATION DECODER

24TC01
24

T

C

01

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 = 1st 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, 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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