L-SB-0001-18

Rev1

January 22, 2018

Techstream ECU Flash Reprogramming Procedure
Service
Category

Engine/Hybrid System

Section

Emission Control

Market USA

Applicability
YEAR(S)

MODEL(S)

2001 - 2020

CT200H, ES300H, ES330,
ES350, GS F, GS200T,
GS300, GS350, GS430,
GS450H, GS460, GX460,
GX470, HS250H, IS F,
IS200T, IS250, IS250C,
IS300, IS350, IS350C,
LC500, LC500H, LFA,
LS430, LS460, LS500,
LS500H, LS600H, LX470,
LX570, NX200T, NX300,
NX300H, RC F, RC200T,
RC300, RC350, RX300,
RX330, RX350, RX400H,
RX450H, SC430, UX200,
UX250H

ADDITIONAL INFORMATION

REVISION NOTICE
July 01, 2019 Rev1:
 Applicability has been updated to include 2019 – 2020 model year Lexus vehicles.
 The Techstream Preparation and Process Overview sections have been updated.
Any previous printed versions of this bulletin should be discarded.

SUPERSESSION NOTICE
The information contained in this bulletin supersedes Service Bulletin No. L-SB-0021-14.
 Applicability has been updated to include applicable 2018 models and 2016 – 2018 model year
RC 300 and 2015 – 2018 model year RC 350 vehicles.
 Applicability has been updated to exclude 2001 – 2003 model year ES 300 vehicles.
Service Bulletin No. L-SB-0021-14 is obsolete and any printed versions should be discarded.
Be sure to review the entire content of this bulletin before proceeding.

© 2019 Lexus, a division of Toyota Motor Sales, USA

Page 1 of 16

L-SB-0001-18

Rev1

January 22, 2018

Page 2 of 16

Techstream ECU Flash Reprogramming Procedure
Introduction

Flash reprogramming allows the Electronic Control Unit (ECU) software to be updated without
replacing the ECU. Flash calibration updates for specific vehicle models/ECUs are released as
field-fix procedures described in individual Service Bulletins. This bulletin details the Techstream
ECU flash reprogramming process and outlines the use of the Technical Information System (TIS)
and the Calibration Update Wizard (CUW). Flash calibration updates can only be applied to the
vehicle/ECU combination for which they are intended. ECUs have internal security that will not
allow them to be programmed with another ECU’s information.
NOTE
ECU is a Lexus term used to describe integrated computerized devices responsible for managing the
operation of a system or subsystem. For the purposes of this bulletin, the term ECU is used as a generic
label for the following SAE J1930 standard references:





Powertrain Control Module (PCM)
Engine Control Module (ECM)
Transmission Control Module (TCM)
Any other Lexus-specific control unit

Warranty Information
OP CODE

DESCRIPTION

TIME

OFP

T1

T2

N/A

Not Applicable to Warranty

–

–

–

–

Parts Information
PART NUMBER
PREVIOUS

NEW

00451-00001-LB L

PART NAME

QTY

Authorized Modifications Label

1

NOTE
Authorized Modifications Labels may be ordered in packages of 25 from the Materials
Distribution Center (MDC) through Dealer Daily – Parts – Dealer Support Materials Orders.

© 2019 Lexus, a division of Toyota Motor Sales, USA

L-SB-0001-18

Rev1

January 22, 2018

Page 3 of 16

Techstream ECU Flash Reprogramming Procedure
Required Tools & Equipment
REQUIRED EQUIPMENT

SUPPLIER

PART NUMBER

QTY

TSADVUNIT

Techstream ADVi*
Techstream 2.0

TS2UNIT

ADE

Techstream Lite

1

TSLITEPDLR01

Techstream Lite (Green Cable)

TSLP2DLR01

*Essential SST.

NOTE
 Only ONE of the Techstream units listed above is required.
 Software version 14.10.028 or later is required.
 Additional Techstream units may be ordered by calling Approved Dealer
Equipment (ADE) at 1-800-368-6787.
 Use Techstream or an approved J2534 interface to perform flash reprogramming updates. Visit
techinfo.toyota.com for more information regarding J2534 reprogramming.
SPECIAL SERVICE TOOLS (SST)

PART NUMBER

QTY

Battery Diagnostic Tool*

DCA-8000P T

1

*Essential SST.

NOTE
Additional SSTs may be ordered by calling 1-800-933-8335.

Techstream Preparation
Select the Correct User Type

The appropriate user type MUST be selected for Techstream to function correctly.
Figure 1.

Perform the following:
1. Select Setup from the Techstream main
menu screen.
2. Select Techstream Configuration from the
Setup dropdown menu.
3. Select the area and language.
4. Input information and select US Dealer 1
from the User Type dropdown menu.

© 2019 Lexus, a division of Toyota Motor Sales, USA

L-SB-0001-18

Rev1

January 22, 2018

Page 4 of 16

Techstream ECU Flash Reprogramming Procedure
Techstream Preparation (continued)
Select the Correct VIM

Techstream software requires a VIM selection before it can be used for reprogramming.
Perform the following:

Figure 2.

5. Select Setup from the Techstream main
menu screen.
6. Select VIM Select from the Setup
dropdown menu.

7. Select the correct interface setup from the dropdown list.
 If using Techstream ADVi, select MongoosePro MFC2.


If using Techstream 2.0, select MongoosePro MFC.



If using Techstream Lite, select MongoosePro MFC (blue or updated clear case), or
MongoosePro MFC2 (green case) depending on the cable being used.
NOTE
Mongoose Driver MUST be installed before Mongoose selections will be available.
See TIS – Diagnostics – Scantool page for additional information.

8. Click OK.

© 2019 Lexus, a division of Toyota Motor Sales, USA

L-SB-0001-18

Rev1

January 22, 2018

Page 5 of 16

Techstream ECU Flash Reprogramming Procedure
Process Overview

Techstream ECU flash reprogramming is a four-step process:
1.

Verify the vehicle’s applicability for recalibration and locate the desired calibration file by
performing the Techstream Health Check function.
NOTE
Techstream will automatically search TIS for the appropriate Service Bulletin using the current
calibration ID from the vehicle if the PC is connected to the Network (see figures below).
Calibration file links can be found embedded in the corresponding Service Bulletin.
Figure 3. Not Connected to a Network

Figure 4. Connected to a Network

2. Connect the DCA-8000 battery diagnostic tool using “Power Supply Mode” ONLY.
The DCA-8000 battery diagnostic tool includes a power supply mode to help maintain battery
voltage at 13.5V during ECU reprogramming.
NOTICE
 ECU damage may occur if the correct battery charger mode setting is NOT used.
 Refer to Vehicle Reprogramming Tips for other approved chargers, located at
TIS – Diagnostics – Reprogramming – Reference Documents.

3. Locate the appropriate calibration ID and reprogram the vehicle ECU with Techstream.
Techstream uses the CUW application to open calibration files and facilitate the ECU flash
reprogramming process.
4. Attach the Authorized Modifications Label.
Modifications to ECU calibrations MUST be recorded and properly displayed on the vehicle
using the Authorized Modifications Label.
© 2019 Lexus, a division of Toyota Motor Sales, USA

L-SB-0001-18

Rev1

January 22, 2018

Page 6 of 16

Techstream ECU Flash Reprogramming Procedure
Operation Procedure

1. Verify the vehicle’s applicability for recalibration and locate the desired calibration file.
A. Connect Techstream and establish a vehicle connection.
B. Click the Health Check button on the
System Select tab.

C. Choose the desired ECU group(s) in
the Health Check dialog box, then
click Next.

D. Click Continue to view the Health
Check results.

Figure 5.

Figure 6.

Figure 7.

© 2019 Lexus, a division of Toyota Motor Sales, USA

L-SB-0001-18

Rev1

January 22, 2018

Page 7 of 16

Techstream ECU Flash Reprogramming Procedure
Operation Procedure (continued)

E. Available calibration updates are indicated by a Yes link in the Calibration Update column.
Click the Yes link to access the appropriate Service Bulletin on TIS.
NOTE
 Note ANY DTCs stored in systems that will be flash reprogrammed.
 Clicking the Yes link will automatically launch TIS and perform a calibration search.