TECHSTREAM Ecu Flash Reprogramming Procedure (SS002-07)

TECHSTREAM ECU FLASH REPROGRAMMING PROCEDURE

TECHNICAL SERVICE BULLETIN

TECHSTREAM ECU FLASH REPROGRAMMING PROCEDURE

Model(s): 2001 - 2008 Applicable Lexus

Section: SPECIAL SERVICE TOOLS

Bulletin No.: SS002-07

Date: March 5, 2007

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.

Applicable Vehicles

• 2001 - 2008  model year applicable Lexus  vehicles.

Parts Information

PREVIOUS PART NUMBER	CURRENT PART NUMBER	PART NAME	QTY
N/A	00451-00001-LBL	Authorized Modification Label	1

Warranty Information

OP CODE	DESCRIPTION	TIME	OFP	T1	T2
N/A	Not Applicable to Warranty	-	-	-	-

Required Tools & Equipment

REQUIRED EQUIPMENT		SUPPLIER	PART NUMBER	QTY
TIS Techstream*  NOTE: Software version 2.00.008, or later, is required.	Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.	ADE	TSPKG1	1

REQUIRED SPECIAL SERVICE TOOLS (SSTs)		SUPPLIER	PART NUMBER	QTY	DRW(2)
Digital Battery System Analyzer (1)	Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.	SPX/OTC	00002-V8150-KIT	1	24
GR8 Battery Diagnostic Station (1)	Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.	SPX/OTC	00002-MCGR8	1	-
(1) Essential SSTs. (2) Drawer number in SST Storage System.

Process Overview

Techstream ECU flash reprogramming is a 4-step process:

1. Verify the vehicle's applicability for recalibration and locate desired calibration file.

   Vehicle applicability can be determined by the following methods:

   • Techstream ECU Reprogram Function
   • Techstream Health Check Function
   NOTE: Techstream 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.
   • TIS Calibration Search
   • TIS TSIB Search
   NOTE: TIS searches can be performed by picking Division/Model/Year, current calibration ID, or VDS code.
2. Connect the GR8 battery charger.

   The GR8 battery charger includes a Power Supply Mode that maintains battery voltage at 13.5 volts during ECU reprogramming.

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. Affix the Authorized Vehicle Modification Label.

   Modifications to ECU calibrations MUST be recorded and properly displayed on the vehicle using the Authorized Modification Label.

Operation Procedure

The following steps describe how to properly flash reprogram an ECU using the Techstream diagnostic application.

1. Verify the vehicle's applicability for recalibration and locate desired calibration file.
   1. ECU Reprogram Method:
      1. Establish a vehicle connection.
      2. Click the ECU Reprogramming  button on the System Select tab (Fig 1).
         Fig 1: Display Screen - ECU Reprogramming Button

         Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
      3. Select available ECU(s) from the Calibration Update Check List (Fig 2).
         NOTE: Multiple ECUs can be selected.
      4. Click the green arrow button (bottom right of screen) to retrieve current calibration ID(s) and check for available calibration updates.
         Fig 2: Display Screen - Calibration Update Check List

         Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
      5. Available calibration updates are indicated by a Yes  in the Calibration Update  column (Fig 3). Click the Yes  link to access the appropriate service bulletin on TIS.
         NOTE:

         • Prior to flash reprogramming, check applicable systems for DTCs and note any DTCs.
         • Clicking the Yes  link will automatically launch TIS and perform a calibration search.
           Fig 3: Display Screen - Calibration Update

           Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
      6. Log in to TIS. (If already logged in, skip this step.)
      7. To access the calibration file, click the service bulletin link in the Document Title column of the Calibration Search Result  portlet (Fig 4).
         NOTE: Only Lexus Senior, Master, and DS Technicians may access calibration files.