L-SB-0021-14

Ju ne 12, 201 4

Rev1

Techstream ECU Flash Reprogramming Procedure
Service
Category

Engine/Hybrid System

Secti on

Emission Control

Market

USA

Lexus Supports ~
ASE Cert1ficahon-

Appl icability
YEAR(S)

MODEL(S)

2001 - 2015

CT200H , ES 300,
ES300H, ES330,
ES350, GS300,
GS350 , GS430,
GS450H, GS460,
GX460 , GX470,
HS250H, IS F, IS250,
IS250C , IS300, IS350,
IS350C , LFA, LS430 ,
LS460 , LS600H,
LX470 , LX570,
NX200T, NX300H, RC
F, RC350, RX300,
RX330, RX350,
RX400H, RX450H,
SC430

ADDITIONAL IN FORMATION

REVISION NOTICE
October 23 , 2014 Rev1 :
• Applicability has been u pdated to include 2015 model year NX 200t, NX 300h , RC 350, and
RC F v ehicles.
• The Required Tools & Equipment section has been updated .
Any previous printed versions of this bulletin should be discarded .

SUPERSESSION NOTICE
The information contained in this bulletin supersedes SB No. L-SB-0015-10.
• Applicability has been updated to include 2015 model year Lexus vehicles .
Service Bulletin No. L-SB-0015-10 is Obsolete and any printed versions should be discarded . Be
sure to review the entire content of this bulletin before proceeding.

© 2014 Lexus, a division of Toyota Motor Sales. USA

Page 1 of 23

L-SB-0021-14

Rev 1

June 12, 2014

Pag e 2 of 23

Techstream ECU Flash Reprogramming Procedure

Int roduction

Flash reprogramming allows the ECU software to be updated without replacing the ECU. Flash
cali bration updates for specific vehicle models/ECUs are released as field-fix procedures described
in individual Service Bu lletins. This bulletin details the Techstream ECU flash reprogramming
process and outlines use of the Technical Information System (TIS) and the Calibratio n Update
Wizard (C UW) . 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.
ECU
Electro nic Control Unit (ECU ) is a Lexus term used to describe integrated computerized devices
responsible for managing th e operation of a system or subsystem . For th e purposes of this
bulletin , the term " ECU" is us ed as a generic label for the following SAE J1930 standard references :
• Powe rtrain Control Mod u le (PCM)
• Engine Control Module (ECM)
• Transmission Control Modul e (TCM)
• Or any other Lexus spec ific control unit

Warranty Information
OP CODE

DESCRIPTION

TIME

OFP

T1

T2

N/A

Not Applicable to Warranty

-

-

-

-

© 2014 Lexus. a d1v1s1on of Toyota Motor Sales, USA

Rev1

L-SB-0021-14

Page 3 of 23

June 12, 201 4

Techstream ECU Flash Reprog ramming Procedure

Parts Informati on
PREVIOUS PART NUMBER

CURRENT PART NUMBER

PART NAME

QTY

00451-00001-LBL

Same

Authorized Modification Labels

1

NOTE
Authorized Modification Labels may be ordered in packages of 25 from the Mat erials Distribution
Center (MDC) through Dealer Daily - Dealer Support Materials Orders.

Req uired Tools & Equipment
REQUIRED EQUIPMENT

Techstream 2.0*
Techstream Lite

SUPPLIER

ADE

PART NUMBER

QTY

TS2U NIT

1

TSLITEPDLR01

NOTE
• Only ONE of the Techstream units listed above is required.
• Software version 9.20.022 or later is required .
• Additional Techstream units may be ordered by calling Approved Dealer
Equipment (ADE) at 1-800-368-6787.
• The Diagnostic Tester is NOT recommended for flash reprogramming .
Please use Techstream o r 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

GR8 Batt ery Diagnostic Station*

00002-MCGR8

1

NOTE
Add itional SSTs may be ordered by calling 1-800-933-8335.
• Essential SST

© 2014 Lexus. a division of Toyota Motor Sales. USA

L-SB-0021-1 4

Rev1

June 12, 201 4

Page 4 of 23

Techstream ECU Flash Reprogramming Procedure

Techst rea m Preparatio n

Se lecting the Correct VIM.
Techstream software requires a VIM selection before it can be used for reprogramming .
Perform the following :
1. Select Setup from the Techstream Main Menu screen .
2. Select VIM Select from the Setup drop down menu.
Figure 1.

0Techstream _

---~~

,

·

Vw4 21002

© 2014 Lexus, a division of Toyota Motor Sales, USA

L-SB-0021-14

Rev1

Ju n e 12, 201 4

Page 5 of 23

Techstream ECU Flash Reprogramming Procedure

Techstream Preparati on (Continued )

3. Select the correct Interfa ce Setup from the drop down list.
• If using Techstream 2.0, select MongoosePro MFC.
• If using Techstream Lite, select Mongoose MFC or MongoosePro MFC (depending on the
cable being used).
NOTE
Mo ngoose Driver MUST be installed before Mongoose select ions will be available.
See TIS - Diagnostics - Scantoo/ page for addit ional informat ion .

• If using TIS Techstream, select TIS Techstream VIM.
4. Click OK.
Process Overvi ew

Techstream ECU flash reprogramming is a 4-step process:
1. Verify the vehicle's applica bility for recalibration and locate desired calibration file by performing
the Techstream Health Check function.
NOTE
Techstream will automatically search TIS for the appropriate Serv ice Bullet in usi ng the
current Calibratio n ID from the vehicle. Calibratio n fi le lin ks ca n be fo und em bedded in th e
corresponding Service Bulletin.

2. Connect the GR8 Battery Diagnostic Station using "Power Supply Mode" only.
The GR8 Battery Diagnostic Station includes a Power Supply Mode to help maintain battery
voltage at 13.5 volts during ECU reprogramming.
NOTICE
ECU damage may occur if th e correct battery charger m ode setting i s NOT used .

3. Locate appropriate calibration ID and reprogram the vehicle ECU with Techstream.
Techstream uses the Calibration Update Wizard (CUW) application to open calibration fi les and
fa cilitate the ECU flash reprogramming process.
4. Attach the Authorized Vehicle Modification Label.
Modifications to ECU calibrations MUST be recorded and properly displayed on the vehicle using
the Authorized Modification Label.

© 2014 Lexus, a d1v1sion of Toyota Motor Sales, USA

L-SB-0021-14

Rev1

Ju ne 12, 2014

Page 6 of 23

Techstream ECU Flash Reprogramming Procedure

Operation Procedure

1. Verify the vehicle's applica bility for recalibration and locate desired calibration file.
A. Connect Techstream and establish a vehicle connection.
B. Cl ick the Health Check button on the System Select tab.
Figure 2.
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Syst em Selection Menu

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