Issue: Have Lexus GS model, and broke one tire while putting on my new tires, and do not have the right tool (or both) to unlock the ECU and register the new TPMS module.
Download Techstream and invest in a mongoose OBD-II cable. Best $20 buck I’ve spent and I was able to reprogram the ECU with the new TPMS reg code plus more. You will also need a TPMS scanner to pull the reg code off each sensor, but that is if you already have the sensor inside the tire.
The link for the cable:
And the link of Techstream source:
Next is on how to reprogram Toyota ECU with TIS techstream?
TIS Techstream Definition:
Techstream 2.0 combines the functionality of TIS and the scantool into a single portable device. With Techstream 2.0, technicians can simultaneously view/analyze on–board vehicle data, browse relevant TIS service documents, and reprogram vehicles all from the driver’s seat via wireless connection to TIS. The Techstream 2.0’s Panasonic CF-31 PC provides a bigger and brighter screen, faster processor, longer battery life, and a bigger keyboard over its predecessor. The Snap-on backpack offers a durable all–in-one package for technicians.
Scantool Diagnostics Definition:
Techstream 2.0 offers full support for 1996 – current vehicles marketed in North America. Periodic software updates will be available to support new models. Techstream 2.0 provides quick and easy access to all available systems on the vehicle as well as a one touch vehicle status report (Health Check).
Vehicle Reprogramming Definition:
Toyota/Lexus/Scion ECMs can be reprogrammed using the Techstream 2.0 scantool. Techstream 2.0 software version requirements are specified in applicable Technical Service Bulletins (TSBs), which can be accessed with a subscription to this website. Older documents may state to use the TIS Techstream or Diagnostic Tester as being the required tool. Techstream 2.0 techstream is the replacement for the Techstream 1.0 and Diagnostic Tester and can be used for all 1996–current Toyota/Scion/Lexus vehicles marketed in North America.
Toyota reprogramming notes: (IMPORTANT)
It is possible to permanently damage a vehicle controller during the flash reprogramming process. It is especially important to understand that once started, the reprogramming process must not be interrupted, reprogramming devices must not be disconnected and PCs must not be allowed to go into Standby, hibernation or similar power management modes. The information provided herein is intended expressly for use by qualified professional automobile technicians. To prevent damage to your customer’s vehicle and ensure safe service practice, read these materials completely and thoroughly before servicing the vehicle and be sure to follow all instructions.
Toyota reprogramming with a J2534 interface:
Toyota, Scion, and Lexus ECMs can be reprogrammed with the TIS Techstream, Techstream Lite, Diagnostic Tester, or can also be reprogrammed using a Toyota validated J2534 interface. Vehicle recalibration requires the use of the following:
- Toyota validated J2534 interface
- TIS Professional Level Subscription
- Toyota Calibration Update Wizard software (installed along with Techstream Software)
- Personal Computer running Microsoft Windows XP/2000 or later operating system
Toyota strongly recommends USING ONLY VALIDATED INTERFACE DEVICES that appear on this list.
Toyota works closely with J2534 interface manufacturers to ensure that their hardware works safely and efficiently with our products. Every device listed on this page has been thoroughly tested and validated on Toyota, Scion, and Lexus vehicles.
It is important to understand that only the specific devices, firmware, DLLs and APIs listed here have been tested by Toyota. We do not recommend use of any other J2534 device, firmware, DLL or API that is not listed here. Changes to J2534 hardware/software is outside of Toyota’s control; in some cases, changes made to device hardware/software can negatively impact reprogramming performance. Toyota makes every effort to continue to work with J2534 interface manufacturers to ensure continued product compatibility as our respective products evolve.
One more time, the cheapest mini vci cable for Toyota is confirmed to work for ECU reprogramming.