Program Toyota H chip all keys lost by Vxdiag Vcx Nano Techstream

Toyota H chip all keys lost with Toyota Techstream, how to do? Here is the step-by-step instruction for you. Wish it helps.


First you should buy a Toyota OEM Standard Transponder Key : H Chip (Non-Valet) / 89785-0D 170 / TOY 44H. Because it is frequent that non original Toyota H key sold on Ebay will not work.

Then the step to follow to pragram (Non-Valet) / 89785-0D 170 / TOY 44H key on 2014+ Toyota.
With Vxdiag vcx nano for Toyota running Techstream V12.00.127, you need disassemble the immo box for some models

Download and install Techstream 12.00.127 on Windows 7, with the help of the user guide from

Disassemble the immo box

Plug the vxdiag vcx nano Toyota scanner into the OBD2 socket and connect the other end with laptop via USB port

Inserted the master key and turned the ignition to ON.

Click on “Connect to Vehicle”


select 2WD or 4WD, 4WD of course.

run a Health Check and the Techstream software was well communicated with all the ECMs for various systems.

started by programming the remote keyless door lock functions

chose “Main Body” in “System Selection Menu”

select “Utility” and “Wireless Code Registration.”

Follow the “Wireless Code Registration Wizard” popped up windows prompts:

key programming is complete (took 2 minutes).

Click on “Next” to program another key or “Exit” if finished.

Now start programming the immobiliser chip so the key would actually start the engine.

chose “Immobiliser” in “System Selection Menu”

Select “Immobiliser Live” tab appeared

click on “Utility” and “Key Registration”

Another wizard popped up…turn the ignition off, then back on and next. Then it asked me to turn it back off, remove the master key, insert the new key and next.

The security light started flashing, as a timer on the screen counted down from about 90 seconds while the ECU learned the new key code. Once the counter got down to zero, it said “Programming Complete” and showed a “Next” and “Exit” button as before. Then tested the key, started the engine, locked/unlocked the doors and it all worked perfectly.


Alternatively, you can program keys via OBD (the easiest method) using an Obdstar key programmer

Obdstar x300 pro3 key master: for locksmiths

Obdstar F101 Toyota: for diy users/ Toyota owners

Obdstar f101 key programmer supports 4D(67,68) chip, 72 chip(WITH G,EUROPE), smart key immobilizer reset (All keys lost) .

How to program Toyota H chip key through OBD

Vxdiag Vcx Nano Techstream do Toyota H chip All Keys Lost

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