Toyota Pruis 2005 ECU Flash Reprogramming with Techstream

Flash reprogramming allows the Electronic Control Unit (ECU) software to be updated without
replacing the ECU.   The following steps describe how to properly flash reprogram an ECU using the
Techstream diagnostic application and Calibration Update Wizard (CUW).

What’s Calibration Update Wizard (CUW)?

Calibration Update Wizard is a software program developed by Toyota Diagnostics. A scheduled task is added to Windows Task Scheduler in order to launch the program at various scheduled times (the schedule varies depending on the version).

Models applied:

Toyota:

2001 – 2013

4Runner, Avalon,
Camry, Camry HV,
Celica, Corolla, Echo,
FJ Cruiser, Highlander,
Highlander HV, Land
Cruiser, MR2 Spyder,
Matrix, Prius, Prius
C, Prius PHV, Prius
V, RAV4, Sequoia,
Sienna, Solara,
Tacoma, Tundra,
Venza, Yaris

Lexus:

2001 – 2018 Engine/Hybrid System

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

Example: Toyota Prius 2005

Toyota 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

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

Toyota 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 Setup from the Techstream Main Menu screen.

2. Select VIM Select from the Setup drop-down menu.

3. Select the correct interface setup from the drop-down list.

4.Enter vehicle information

Step 1. Verify the vehicle’s applicability for recalibration and locate desired calibration file.
A. ECU Reprogram Method:
a. Establish a vehicle connection.
b. Click the ECU Reprogramming button on the System Select tab

c. Select available ECU(s) from the Calibration Update Check List

d. Click the green arrow button (bottom right of screen) to retrieve current calibration ID(s) and check for available calibration updates.

e. Available calibration updates are indicated by a Yes in the Calibration Update column . Click the Yes link to access the appropriate service bulletin on TIS.

f. Log in to TIS. (If already logged in, skip this step.)
g. To access the calibration file, click the service bulletin link in the Document
Title column of the Calibration Search Result portlet

B. Health Check Method.
a. Establish a vehicle connection.
b. Click the Health Check button on the System Select tab

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

e. Click Continue to view Health Check results

d. Click Next.

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

g. Log in to TIS. (If already logged in, skip this step

h. To review the TSIB and access the calibration file, click the service bulletin link
in the Document Title column of the Calibration Search Result portlet.

NOTE:
Only Lexus Senior, Master, and DS Technicians may access calibration files

Step 2: Connect the GR8 Battery Diagnostic Station.

A. Connect the GR8 Battery Diagnostic Station to the vehicle and turn it ON.
B. Select Power Supply Mode by following the screen flow below

Click the appropriate calibration ID and reprogram the vehicle’s ECU with Techstream.
A. After reviewing the procedures outlined in the selected Service Bulletin, click the appropriate
calibration ID link by matching the vehicle’s current calibration ID to the Previous Calibration
ID in the Calibration Identification Chart.

• Calibration files are embedded as live links in the Service Bulletin.
• Some vehicles require special preparation — please review the selected Service
Bulletin carefully.

Step 3: Reprogram ECU with Techstream

Open Calibration Update Wizard

Select desired programming device, here we choose Generic J2534  interface

Confirm the following:
• PC is connected to VIM.
• VIM is connected to DLC3 connector.
• Ignition is ON and engine is OFF or “READY” OFF (hybrid vehicles)

Press File Open button to open calibration file

Connect J2534 interface with vehicle
Select correct J2534 device tool

Downloading current calibration information from vehicle

Verify correct current calibration and new calibration information

• The total number of calibration IDs in the calibration file corresponds to the number of
reprogrammable processors in the ECU.
• Each calibration file may contain up to three separate calibrations.

• Figure above shows an example of the update procedure for a one-processor ECU.

Press Next

Turn ignition OFF
Press Next

Wait for 10 seconds

Confirm the following conditions:
1. Turn ignition ON
2. Engine hood open
3. All eletrical accessories are OFF
4. Battery voltage above 11.8V

Verify the vehicle is connected to a battery charger before continuing — If battery voltage falls below 11.4 volts, ECU damage may occur

Click Start button to begin reprogramming

• ECU flash reprogramming may take anywhere from 3 – 30 minutes per calibration file.
• Reprogramming time will vary depending on model and ECU communication protocol.
Vehicles using CAN communication protocol will reprogram much faster (2 – 7
minutes).

Flash calibration CAL1 update in process

• If vehicle requires only ONE calibration update, then proceed to step N in this bulletin.
• If vehicle requires a SECOND calibration update, then continue as follows:
• For serial communication vehicles, go to step J.
• For CAN communication vehicles, go to step L.

(* Do NOT disturb the vehicle during flash reprogramming.

If key cycle is NOT done properly, reprogramming will stop at 10% and Cal 1 will fail to load.)

CAL 1 has been loaded successfully
Turn ignition OFF
Press Next

When Cal 1 has completed the update process, turn ignition OFF for a minimum of
10 seconds.

Turn ignition ON

Downloading current calibration information from vehicle

Confirm that calibration ID has been updated

Confirm all calibrations were updated as specified in the Service Bulletin. Then click Finish.

NOTE
Some DTCs may have been set during the reprogramming process. Clear all DTCs with Techstream software
after restoring vehicle.

Step 4: Attach the Authorized Modifications Label.
A. Using a permanent marker or ball point pen, complete the Authorized Modifications Label
and attach to the vehicle. The Authorized Modifications Label is available through the MDC,
P/N 00451-00001-LBL.

Attach the label under the hood in the location determined by the specific Service Bulletin
or Campaign.

NOTE
Wait 60 – 90 seconds for ink to set before handling.

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http://blog.obdii365.com/2018/09/24/toyota-pruis-2005-ecu-flash-update-by-techstream/

Lexus GS300 and CT200 ABS Bleeding with Techstream

Look here: how to flush my brakes on an 06′ GS-300 and a 13′ CT-200, using a Techstream scanner

What is ABS Bleeding:

ABS Bleeding is used to purge air from the hydraulic braking system

What for Toyota ABS Bleeding:

I purchased the Mini VCI Toyota Techstream kit off obdii365.com

Car: a 2006′ GS-300 and a 2013′ CT-200

Time: flushed my brakes on both cars in three hours. The GS took a bit longer (more steps)

Operation system: the software on a 32-Bit windows OS,Using Windows 8.1 on an old Vista machine.

Software install and connection:

Basically install the software on a 32-Bit windows OS,Using Windows 8.1 on an old Vista machine.

Then load the driver, connect to the OBD-2 port the then run the software.

Click connect to Vehicle and follow the screen shots.

It’s part old fashion two man bleed(pump pedal then crack the bleed screw) and part car purging air from the lines electronically.

ABS Bleeding with Techstream:

Utility selection menu: ABS Bleeding

Car: LEXUS GS300 2006

Engine: 3GR-FSE

ABS Bleeding is used to purge air from the hydraulic braking system

Note: when bleeding, ensure that the fluid level does not drop below the indicated minimum line on the resevoir

Increase inline:

(FR/FL/RR/RL)

• Connect the vinyl bleeder tube to one of the four bleeder plugs
• Depress the brake pedal several times, then hold the pedal down
• While holding the pedal down, loosen the bleeder plug to allow brake fluid to drain through the connected tube
• When fluid stops draining, tighten the bleeder plug, then release the brake pedal

Repeat the process until the air stops coming out.

When finished with all wheels, press Next to proceed

Increase inline:

(FR/RR)

Caution: when bleeding ensure that the fluid level does not drop below the indicated minimum line on the reservoir

Connect the vinyl bleeder tube to the bleeder plug at the right front wheel or the right rear wheel and loosen the bleeder plug

Caution: do not press the brake pedal for any of the remaining inhalation line screens

Decrease inline:

(FR/FL/RR/RL)

Caution: ensure that the fluid level does not drop below the indicated minimum line on the reservoir

Connect the vinyl bleeder tube to either one of the bleeder plug and loosen the bleeder plug

Caution: the next step requires the brake pedal to be depressed and held

Do not release the brake pedal while the 4 seconds bleeding process is running

Press and hold the pedal down, then press Next to run the bleeding process for 4 seconds

Tighten the bleeder plug, then release the brake pedal

Please wait for 20 seconds

Repeat this process until all the air in the fluid is completely bled out for FR and RR

Press yes to repeat this process, or press no to exit this process

Increase inline:

(FR/FL/RR/RL)

• Connect the vinyl bleeder tube to one of the four bleeder plugs
• Depress the brake pedal several times, then hold the pedal down
• While holding the pedal down, loosen the bleeder plug to allow brake fluid to drain through the connected tube

Air bleeding is complete!

Job’s done!

http://www.obdii365.com/service/lexus-gs300-and-ct200-abs-bleeding-guide-with-techstream-103133.html

How to reset Toyota Airbag SRS Computer Crash Data

How to: reset Toyota Airbag SRS Computer Crash Data. 

Step 1: Introduction
The airbag computer controls the supplemental restraint system in your vehicle, including the airbag sensors, inflators and seat belt pretensioners. It also acts as a black box when you get into a major collision that involved.

Step 2: Airbag Computer's Cannot Be Reused
Well if you decide to rebuild the vehicle and replace the airbags:

You need to replace the SRS computer, since it has a hard code inside that can’t be erased and you’ll be stuck with an airbag light on:

You won’t even be able to access the SRS computer using Toyota techstream software either.

Step 3: Remove the Airbag Computer

The airbag computer is located underneath the dashboard. The bottom half needs to be removed to access it.

Disconnect battery before working on SRS system

Step 4: Disasemble the Airbag Computer
Airbag computer removed:

Open up the computer:

We’re looking for this 8 pin SMD EEPROM chip here that stores the crash data, it says L56R on it

Step 5: Solder and Hookup to an EEPROM Reader
Solder some 32 gauge hookup wire to connect it to the serial
port EEPROM reader (lots of EEPROM reader options, CG100 is best for Japanese car airbag reset)

I built a little EEPROM reader using some resistors and diodes:

Here’s the setup, with the airbag computer EEPROM going to the reader, and then the reader going to the serial port directly on a legacy Pentium 4 computer. You can also purchase USB EEPROM readers

Step 6: Analyze Crash Data
Then I used PonyProg software which is a serial device programmer to read from the EEPROM chip:

Here’s what the crash data looks like:

From a clean, uncrashed Corolla, I dumped the information from its SRS computer and it looks like this:

Comparing the two, you can see a lot of data values have changed.

So now I’m going to replace all the values from the crashed chip with those from the virgin chip and rewrite it to the computer to clear the hard code. Then I’ll replace it into the vehicle

Step 7: Replace the Airbag Computer
So now I’m going to replace all the values from the crashed chip with those from the virgin chip and rewrite it to the computer to clear the hard code. Then I’ll replace it into the vehicle

Step 8: Test to Make Sure It Works
The SRS light should go out within 6 seconds if everything
is functioning normally. I also double checked it with Toyota techstream software and there aren’t any codes or faults found.

And It works!. 

www.obdii365.com

Why are you advised to Install Techstream on Windows XP?

It’s possible to install Mini VCI cable Toyota Techstream software on Windows 7, Windows 8 and also Windows 10 32 or 64 bit, if you’re equipped with rich knowledge on computer. But actually, many people will not be able to follow the instructions on the web to install the necessary components. No judgement here, it is just reality.

Which is why I up telling people to stick with using an XP laptop instead.

That would be great if you have an XP laptop (or desktop) available…it is definitely a much easier install. But going forward I presume that will be harder to find. I thought the Win10 instructions were a little confusing but I worked thru it.

Note that if you’re not technically savvy, don’t even bother trying to install it on a 64-bit OS. You can double check by right-clicking on “my computer” and selecting “properties”. In the window that comes up, look for the “system type”, which is in the “system” section. It will indicate whether you have a 64 or 32-bit OS.

It is possible to get the drivers installed in a 64-bit environment, but it is not easy. I’m a computer person, and I couldn’t get it to work. Your best bet is an old laptop with Windows XP installed.

You can download Techstream software here: http://blog.obdii365.com/2016/01/14/toyota-tis-techstream-10-30-029-free-download/ .

There are a number of threads here on PC regarding driver & Techstream installation in http://blog.obdii365.com/

You will be hard pressed to get any kind of “official” technical support, because the software that is bundled with these cheap adapters is pirated. To buy a techstream subscription from Toyota (even a very short-term one) is very expensive (much more than a used Win XP laptop will cost you).

Video: How to install Toyota Techstream on Windows XP?

Good luck!

http://blog.obdii365.com/2018/07/02/toyota-techstream-why-windows-xp-why-not-64-bit/