2021 Toyota Models ECU Flash Reprogramming With Security Signature T-SB-0107-20

MG

Moderator
Please see T-SB-0107-20

Applicability:
2021 RAV4 Prime, Sienna HV, Venza Hybrid

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 use of TIS and the Calibration Update Wizard (CUW). To ensure the correct ECU software is installed, ECUs will require a Security Signature before the ECU will initialize the flash reprogramming sequence. This bulletin also details the process for acquiring a Security Signature from TIS during the Techstream ECU flash reprogramming process.

Techstream Preparation:
Select the Correct User Type The appropriate user type MUST be selected for Techstream to function correctly. 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 dropdown menu.

Select 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 dropdown menu.

3. 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 Mongoose 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.

4. Click OK.

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.

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.

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.

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

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

G. To review the Service Bulletin and access the calibration file, click the Service Bulletin link in the Document Title column of the Calibration Search Result portlet.

NOTE:
ONLY Toyota Certified Technicians and other authorized users may access calibration files.

2. Connect the DCA-8000 battery diagnostic tool.
A. Connect the DCA-8000 battery diagnostic tool to the vehicle and turn it ON
B. Select Power Supply Mode

NOTICE
*ECU damage may occur if the correct battery charger and mode setting are NOT used.
*Power Supply Mode is used to maintain battery voltage at 13.5V while flash
reprogramming the vehicle.
*For details on how to use the battery diagnostic tool, refer to the DCA-8000 Instruction Manual located at TIS – Diagnostics – Tools & Equipment – Battery Diagnostics.

3. 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.
B. Click Open to load the calibration file information.

NOTICE:
Errors during the flash reprogramming process can permanently damage the vehicle ECU.
Minimize the risk by following the steps below.
*Battery voltage MUST NOT FALL BELOW 11.8V during reprogramming. Confirm battery
voltage is higher than 11.8V but be sure voltage DOES NOT RISE ABOVE 16.0V
during reprogramming.
*Turn OFF ALL vehicle accessories (audio system, A/C, interior lights, DRL, etc.). Do NOT add to or significantly change the vehicle’s electrical load while reprogramming.
*Confirm the hood is open and ensure under-hood temperature does NOT exceed 158°F (70°C).
*Confirm cable connections between the vehicle and Techstream are secure.
*Do NOT disconnect or turn off Techstream or vehicle ignition during reprogramming.
*Set parking brake.
*Complete ALL flash calibration updates provided for each ECU.
* If the battery’s State-Of-Charge (SOC) or capacity is in question, test with SST No. DSS-5000P T (Battery Diagnostic Tool) and follow the DSS-5000 Instruction Manual located at TIS – Diagnostics – Tools & Equipment – Battery Diagnostics.
*The DCA-8000 battery diagnostic tool MUST be used in Power Supply Mode to maintain battery voltage at 13.5V while flash reprogramming the vehicle.
*For details on how to use the DCA-8000 battery diagnostic tool, refer to the DCA-8000 Instruction Manual located at TIS – Diagnostics – Tools & Equipment – Battery Diagnostics.

C. Click Next to start the calibration update process.
D. 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).
Then, click Next.

E. Verify correct current and NEW calibration information, then click Next.

F. Turn ignition OFF, then click Next

G. Confirm the following:
PC is connected to VIM.
Ignition is ON and engine is OFF or READY OFF (hybrid vehicles).
Hood is open.
ALL accessories are OFF.
Battery voltage is above 11.8V
Then, click Start.

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

H. This vehicle is equipped with additional security measures requiring a Signature from TIS. Select Next to open TIS and retrieve the Signature.

I. Input TIS login credentials and select Login

J. Input TIS login credentials for secondary authentication and select Login.

K. Select Send.

L. Copy the Signature from TIS.

M. Paste the Signature into Techstream and select Next.

Does the vehicle require ONLY ONE calibration update?
YES — Go to substep Q.
NO — If the vehicle requires a SECOND calibration update, continue as follows:
For serial communication vehicles, continue to substep N.
For CAN communication vehicles, go to substep P.

N. When Cal 1 completes the update process, turn the ignition OFF for a minimum of 10 seconds, then click Next

O. Turn the ignition to the ON position, then click Start.

P. Do NOT disturb the vehicle during flash reprogramming

Q. Turn the ignition OFF for a minimum of 10 seconds, then click Next.

R. Turn the ignition to the ON position, then click Next.

S. Confirm ALL calibrations were updated as specified in this Service Bulletin, then click Finish.

NOTE:
On some models, DTCs may set as a result of reprogramming. If DTCs are present, clear codes and run the Health Check again. Troubleshoot ANY remaining current, pending, or history codes. Permanent codes will NOT be cleared using Techstream. Permanent codes do NOT illuminate the MIL and do NOT require troubleshooting. They will clear during normal driving once the Universal Trip Drive Pattern is performed.

4. Attach the Authorized Modifications Label.
A. Using a permanent marker or ballpoint pen, complete the Authorized Modifications Label and attach it to the vehicle. The Authorized Modifications Label is available through the MDC, P/N 00451-00001-LBL.
B. Attach the Authorized Modifications Label under the hood in the location determined by the specific Service Bulletin or Campaign.
 
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