TECHNICAL INSTRUCTIONS
FOR
LIMITED-SERVICE CAMPAIGN 24TD04

DATA COMUNICATION MODULE (DCM) UPDATE

CERTAIN 2020 - 2023 SUPRA

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 currently have completed all the
following courses:
--TIC206A – Electrical repair 1
--TEN019A – Supra Diagnosis
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’s 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.

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 Vehicle Inquiry System for

No further action required.

Not Covered

Campaign eligibility.
Covered

Install latest version of Toyota ISTA

Is vehicle in Transport Mode

Perform Pre-Delivery Service

Yes

No

Determine if I-Level is up to date
using ISTA.

Yes

No

Perform measures plan and check if
“Program TCB” is displayed.

Displayed

Not
displayed

Manually configure “Program
TCB”.

*: I-Level and remaining time MUST
be recorded for the warranty claim.

Reflash the Telematic
Communication Box and record the
remaining time* shown on the
header line.
Campaign completed, return the
vehicle to the customer.

2

I.

IDENTIFICATION OF AFFECTED VEHICLES

• Check the TIS Vehicle Inquiry System to confirm the VIN is involved in this Campaign, and that it has not
already been completed prior to dealer shipment or by another dealer.
• TMS warranty will not reimburse dealers for repairs completed on vehicles that are not affected or were
completed by another dealer.

II. PREPARATION
A. TOOLS, SUPPLIES & EQUIPMENT
•
•
•
•

Standard Hand Tools
Toyota ISTA Diagnostic Cable
Protective Tape
T-SB-0083-19

•
•
•
•

Techstream ADVi
DCA-8000P Battery Diagnostic Tool
T-SB-0151-19
T-SB-0038-20

III. BACKGROUND

IV. OVERVIEW OF REMEDY PROCEDURE (REPROGRAMMING USING ISTA)
Software inside the vehicle’s computers are reprogrammed using Toyota ISTA. Reprogramming
of ECUs via Toyota ISTA requires that the software version status of the ECUs on the vehicle is
unified, so reprogramming is always carried out for all ECUs.
It is not possible to select a target ECU and then reprogram it individually. Always follow the
directions of this document when carrying out reprogramming work in order to prevent any
potential damage to the ECUs due to by communication errors, voltage drops, or other
problems.

3

V. INSTALL THE LATEST VERSION OF TOYOTA ISTA
1. INSTALL TOYOTA ISTA
a. It is CRITICAL to install the latest version of Toyota ISTA on the Techstream ADVi. Your
current ISTA version may not be sufficient for this campaign.
Minimum* ISTA Version Required for this Campaign: 4.40.14
*Versions of ISTA higher than 4.40.14 are also acceptable. As a best practice you should
always install the latest version of ISTA when performing this campaign.

VI. CHECK ISTA VERSION OF TECHSTREAM
1. CHECK TOYOTA ISTA VERSION
a. It is CRITICAL to confirm that the ISTA version installed on your Techstream ADVi meets or
exceeds version 4.40.14 before proceeding.
b. Double-click the icon to start Toyota ISTA.
NOTICE:
After double-clicking, it takes about 15 seconds for Toyota ISTA to
start. Please wait without double-clicking again.

c. The following screen appears. Click “Accept”.

4

d. Click on the Configuration Button as indicated in the illustration.
e. Click on the Version status tab as indicated in the illustration.
f. Compare the installed version to the minimum required version: 4.40.14 If the version is less
than version 4.40.14, install the latest version.

VII. PREPARATION OF PC
1. PREPARATION OF PC
a. Boot-up the Techstream ADVi.
b. Complete all pending Windows updates.
c. Disable any automatic Windows updates and configure
antivirus software so that it doesn’t automatically run.
d. Disable all automatic screen savers.
e. Disable “sleep mode” within windows power settings.
f. Close all other applications.
g. Attach the Techstream ADVi directly to an AC Power
Supply.
h. DO NOT perform any other functions while Toyota ISTA is
reprogramming.

5

VIII.

PREPARATION OF VEHICLE

1. PREPARATION OF VEHICLE
During reprogramming, each system (lights, mirrors, seats, windows, etc.) will
be operated automatically for initialization. If operation is obstructed, a fault
code is recorded, and the initialization may not finish normally. To prevent this,
follow each instruction displayed on the screen while carrying out work.
a. Before starting to work, please make sure that the vehicle
is parked in a flat location that is not subject to direct
sunlight.

b. Please remember that ambient temperature must be
superior to 15 °C.
c. Allow the temperatures of the engine, transmission, and
brake system to fall to the ambient temperature.

d. Set the steering wheel and tires straight ahead position.

e. DO NOT place anything on the windshield so that the
wiper can work normally, because the wiper may move
automatically during reprogramming for initialization.

6

f. Remove all the inserted and connected data carriers from
the drives and disconnect the data connections (e.g.
paired mobile phones), so they DO NOT interrupt
programming by communication or connection.
g. Remove all the third-party electrical devices that can be
removed.

h. Insert the driver seatbelt latch into the lock to prevent the
PAD mode from being deactivated during the
reprogramming.

i.

DO NOT place anything on, in front of, or behind the front
seats because the front seats move automatically during
reprogramming for initialization.

j.

DO NOT cover the headlights with protective covers,
because temperatures may rise, and the headlights may
be deformed or damaged.

k. Set the shift lever to “P” (Automatic transmission) or “N” (Manual transmission), and then
engage the parking brake.
l.

Turn off the engine, and then set all the switches of the electrical components to off.

m. Close the driver-side and passenger-side door., the hood must remain open as the battery
charger will need to be connected to the charging terminals during the reprogramming
process.
n. To make it easy to access the battery just in case the voltage drops and IG OFF, open the
back door and operate the lock latch using a screwdriver to set the latch in the closed
position.

7

IX. CONNECT A BATTERY CHARGER
1. CONNECT A BATTERY CHARGER
a. Connect the specified battery charger to the locations in the illustration.
Required specification:
Charging current: 80A (80 A continuous charging, AGM battery compatible.)
• Unlike other Toyota vehicles, the Toyota Supra is capable of drawing high
amperage (a peak of 70 Amps flows at maximum) during diagnosis and
repair. The Toyota Supra is equipped with an AGM type battery, discharges
will affect the life span of the battery. AGM batteries must not have a
charging voltage that exceeds 14.6 volts.
• Always connect the power supply of the battery charger to an outlet directly.
If a power strip or other device is used, and multiple electrical components
are connected, the battery charger may detect a power supply error due to
insufficient current, and it may not be possible to charge the battery.
• Make sure that the battery charger is off before connecting it.
• Make sure you respect the correct polarity when connecting the battery
charger cables like displayed in the illustration below.
• DO NOT disconnect the battery charger during reprogramming work.
• Observe the instructions of the battery charger manual, and check the
dealership electrical system to ensure the circuit of the outlet to be used can
operate the battery charger.
NOTICE:
During this reprogramming the headlights will turn on, and the seats and other electrical components will
function. To prevent damage to the ECU’s, due to flat battery or voltage drop, ALWAYS connect the
specified battery charger.

8

X. CONNECT THE TOYOTA ISTA
1. CAUTION ON THE CONNECTION ORDER OF THE ISTA
DIAGNOSTIC CABLE
a. Always connect the ISTA diagnostic cable first to your PC
LAN port "1" and only after that to the OBD port of the
vehicle "2".
If this order of operations is not respected possible vehicle
communication issues may occur when using Toyota ISTA
software.
b. The ISTA diagnostic cable always passes through the position shown in the illustration. If it
passes through a place other than the instruction, there is a possibility that the sheet is
automatically operated and the ISTA diagnostic cable is pinched and broken by the
initializing operation during reprogramming.
c. Using the gap between the rear fender and the side garnish, pull out the ISTA diagnostic
cable to the outside of the vehicle. Please use protective tape for holding and protection of
the ISTA diagnostic cable.
If the ISTA diagnostic cable is not passed through the indicated location, the
ISTA diagnostic cable may be pinched, communication may be disconnected,
and the ECUs may be damaged after the seat moves automatically due to
initialization during reprogramming.

NOTICE:

DO NOT attempt to pass the ISTA diagnostic cable thought
the window opening. The window glass may move during
reprogramming or initialization.

Ensure the cable is out of the path of the front Driver’s seat.
During initialization the driver’s seat moves and could damage
cable or disconnect the OBDII connector during movement.

Additionally, DO NOT attempt to pass the ISTA diagnostic
cable through any other position of the door opening as it may
cause damage to the cable.

9

XI. DETERMINE NECESSARY ACTION ACCORDING TO VIN LIST
1. CHECK NECESSARY ACTION ACCORDING TO ISTA
a. Determine if Vehicle is in Transport Mode or I-level is up to date using ISTA:
Group determination

Required Action
Confirm if vehicle is in transport mode (“Transport Mode Indicator”

Vehicles in Transport Mode

Vehicles Requiring Update

is displayed on the combination meter.
Proceed to Section XII.

Check if Program TCB (Telematic Communication Box) is displayed.
Proceed to Section XIV.

XII. CHECK IF PROGRAM TCB (TELEMATIC COMMUNICATION BOX) IS DISPLAYED
1. ENSURE VEHICLE COMPLETED PRE-DELIVERY SERVICE