QOvexus
L-SB-0021-14 June 12, 2014 Technical Service Information Bulletin

Techstream ECU Flash Reprogramming Procedure

Service
Category Engine/Hybrid System
Lexus Supports
Section | Emission Control Market USA ASE Certification
Applicability
YEAR(S) MODEL(S) ADDITIONAL INFORMATION
2001 - 2015 CT200H, ES300,

ES300H, ES330,
ES350, GS300,
GS350, GS430,
GS450H, GS460,
GX460, GxX470,
HS250H, IS F, 15250,
IS250C, 1300, 15350,
IS350C, LFA, LS430,
LS460, LS600H,
LX470, LX570, RX300,
RX330, RX350,
RX400H, RX450H,
$430

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Service Bulletin No. L-SB-0015-10 is Obsolete and any printed versions should be discarded.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.

Introduction

Flash reprogramming allows the 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 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.

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Techstream ECU Flash Reprogramming Procedure

Introduction (Continued)

ECU
Electronic Control Unit (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)

¢ Or any other Lexus specific control unit

Warranty Information

OP CODE DESCRIPTION TIME OFP m1 «| OT2
NIA Not Applicable to Warranty - - = =

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

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Techstream ECU Flash Reprogramming Procedure

Parts Information

PREVIOUS PARTNUMBER | CURRENT PART NUMBER PART NAME ary
00451-00001-LBL Same Authorized Modification Labels 1
NOTE

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

Required Tools & Equipment

REQUIRED EQUIPMENT SUPPLIER PART NUMBER ary
Techstream 2.0° TS2UNIT
TIS Techstream ADE TSPKG1 1
Techstream Lite TSLITEDLRO1

NOTE
* Only ONE of the Techstream units listed above is required.

* Software version 9.10.037 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 or an approved J2534 interface to perform flash
reprogramming updates. Visit techinfo.tayota.com for more information
regarding J2534 reprogramming.

SPECIAL SERVICE TOOLS (SST) PART NUMBER ary
GR8 Battery Diagnostic Station* 00002-MCGR8 1

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

* Essential SST

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Techstream ECU Flash Reprogramming Procedure

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

Figure 1.

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Techstream ECU Flash Reprogramming Procedure

Techstream Preparation (Continued)
3. Select the correct Interface Setup from the drop down list.
+ If using Techstream 2.0, select MongoosePro MFC.

+ Ifusing Techstream Lite, select Mongoose MFC or MongoosePro MFC (depending on the
cable being used).

NOTE
Mongoose Driver MUST be installed before Mongoose selections will be available.

See TIS - Diagnostics — Scantaol page for additional information.

+ Ifusing TIS Techstream, select T/S Techstream VIM.
4. Click OK.

Process Overview
Techstream ECU flash reprogramming is a 4-step process:

1. Verify the vehicle’s applicability for recalibration and locate desired calibration file by performing
the Techstream Health Check function.

NOTE

Techsiream will automatically search TIS for the appropriate Service Bulletin using the
current Calibration ID from the vehicle, Calibration file links can be found embedded in the
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 the correct battery charger mode setting is 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-files.and
facilitate 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 division of Toyota Motar Sales, USA

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Techstream ECU Flash Reprogramming Procedure

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

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Techstream ECU Flash Reprogramming Procedure

Operation Procedure (Continued)

C. Choose desired ECU group(s) in the Health Check dialog box.

Figura 3.

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D. Click Next.

E. Click Continue to view Health Check results. Figure 4.
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~Changes in velicle condaton wil not update sutomatically
To update Health Check, click the “Refresh Health Check” button

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Techstream ECU Flash Reprogramming Procedure

Operation Procedure (Continued)

F. Available calibration updates are indicated by a Yes link in the Cal. 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.

Figure 5.

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