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Tips & Guides: 2005 Lexus GX470 key programming

This is a tutorial of for those being the first 2005 GX470 owner to “program” the key.

 I had a bit of a problem at first with programming the key but it was due to the “timing” where you had to press one or two of the buttons within 2 seconds after opening and closing the door…

 For the record, by “programming” I mean that I was able to get a brand new replacement key to function with my 2005 GX470 for the following functions:


Lock doors

Unlock doors

Panic button


The key still had to go back to the dealer to have it keyed for the ignition kill start. But everything else worked fine.


Note: ignition kill start

The ignition kill start is the FACTORY LEXUS ignition starter kill. Embedded in the the on board LEXUS vehicle is a master component/computer that prevents any attempts to hotwire/jump start the vehicle, like in the movies (eg, break glass, open door, rip panel from under steering wheel, rip wires and splice/short the wires…)


The LEXUS system I believe is called the IMMOBILIZER (?) and it will NOT allow the car/truck to start without the decoded encoded onto the KEY FOB. I told a fib to my dealer and told them that my “factory” key stopped working for the ignition, everything else worked, doors unlock/lock/panic, key turns in (locksmith cut it for me…), dealer cheerfully reprogrammed the key no charge.


Programming instructions – as requested

System Operation:


Pressing LOCK button activates alarm and central locking.

Pressing UNLOCK button one deactivates alarm and unlocks driver’s door only.

Pressing UNLOCK button twice within 3 seconds deactivates alarm and unlocks all doors.

If vehicle is unlocked and doors or trunk/tailgate not opened within 30 seconds, locks/alarm are reactivated.





* Key remote transmitter added or replaced.

* System malfunction



* Driver’s door open, all other doors closed, key removed from ignition switch.

* Within 5 seconds:

* Insert and remove the key from the ignition switch twice.

* Within 40 seconds:

* Close and open the driver’s door twice.

* Insert and remove the key from the ignition switch.

* Within 40 seconds:

* Close and open the driver’s door twice.

* Insert the key into the ignition switch and close the driver’s door.

* Switch ignition ON and OFF once to program a key remote transmitter code whilst retaing the original codes or twice to program a remote transmitter code whilst erasing the original codes. Three times to check how many key remote transmitters are currently registered or five times to erase all registered codes.

* Remove key from ignition ****ch:

* System should now lock and unlock vehicle. Once, twice or five times depending which mode has been selected. One to four times, slowly, to indicate number of key remote transmitters registered.

* Within 40 seconds:

* Press and hold LOCK and UNLOCK buttons simultaneously for 1.5 seconds.

* Within 3 seconds:

* Press and release LOCK or UNLOCK button.

* System should now lock and unlock vehicle once to confirm registration, twice to indicate registration has failed.

* Within 40 seconds:

* Repeat button procedure to program remaining key remote transmitters.


NOTE: To exit programming mode: Open driver’s door or insert ignition key.

NOTE: A maximum of 4 key remote transmitters can be programmed.

NOTE: Lexus key programming tool if you need: VXDIAG VCX Nano Lexus


What is the CHEAPEST way to add Toyota smart keys?

There are optional solutions to make new keys to Toyota with Techstream software or some auto key programmers. Some by the dealer, some diy. Here, you will get the cheapest way to make it.


The Options

A.) Pay the dealership.

This was quoted at ~$400. I called 2 local dealerships (I’m in the GTA) and was quoted 2 different prices, with the second dealership referring me to an agent (which I had previously found online).

B.) Pay an agent / locksmith

This was quoted at $250 but I’ve only found 1 so far. I was told it was an OEM part and would have 6 months of warranty. Any referrals in the GTA would be much appreciated.

Edit: After a number of calls, the cheapest I could find was $180 and $200.

C.) Partial DIY

I see that I can buy the Smart Key online for about $110 and bring it to a dealership or agent/locksmith to have it programmed into the car. I was quoted $50 by the dealership. Any referrals to purchasing OEM Smart Keys online would be much appreciated.

Edit: This option can be very highly “YMMV” as each dealership’s policy may differ regarding used keys (some may do it, some may do it but fail, and others may opt not to do it at all)

D.) Full DIY

If you have a laptop, Techstream software, a connecting cable, and the Smart Key, you can DIY. Its unclear whether the “Ignition Key” portion can be DIY with Techstream (someone please clarify). If you cannot, this seems to defeat the benefit and would seem more beneficial to pursue the Partial DIY option above.

The Techstream software is referred to as $20 or less on the obd2 shops like ($20 around to get “Techstream” and “Mini VCI”)

The website for Techstream shows a subscription model with varying options. I’ve looked at few posts in the forums but overall am lost on the full DIY option.


Confirmed possible! Requires a SEED code calculator which is another $15 for 1 code.

E.) Ski-Mask Approach

According to this post:, all this can be avoided for the low low price of $17. (joking)


The cheapest should the fourth solution: full do it yourself to make a new key.


Here is the how-to’s for reference.


You should have:


Smart Key: The circuit board # inside the to-be-programmed Smart Key matches your existing key(s).

Techstream: You should be able to run the program without an error appearing. There is typically a manual step to have the program launch properly (modify IT3System.ini, “TISFunction = 1” to “TISFunction = 0”)

MVCI Cable: When you plug it into your PC, you should hear the iconic “ding” sound. If you don’t, it would suggest a lose connection (I experienced this and had to open up my cable to get it working). You should also launch the “XHorse Firmware Update Tool” (it comes with the cable’s drivers) and click “Device Info”, which will confirm whether it can communicate with the cable or not (for this check, it does not need to be plugged into the car, only to your PC)


Here you go…



Once you have everything ready to go, start your car and launch Techstream. Leave the driver’s door OPEN for the entire duration.

Click “Connect to Vehicle”

Note: As the procedure I’m running through takes about 20 minutes total, its recommended to have the car running to ensure the battery doesn’t drain out. If you can’t start the car, its mentioned in other bulletins to have the car hooked up to a backup battery

Techstream should automatically detect your car (mine was a 2010 RAV4, ignore the details in the image, its just for reference), except for an option or two (I had to indicate “/w Smart Key” functionality and that my car was “2WD”)

After a while, you will arrive at the System Select page. I suggest you copy-paste your VIN# to Windows notepad so that you have it handy later (applicable for used Smart Key registration only)

All of the ECUs will be yellow. You can click “Health Check” to have Techstream go through each of the ECUs and determine its status, which takes a few minutes and will change their colour. If you decide to skip the “Health Check”, you can still click on the individual ECU you’re looking for and it will read only that specific ECU (you’ll be waiting a few seconds instead of minutes, its basically the same as the “Health Check”, but only for that ECU).



The ECU I needed was labelled “Smart Key” (2010 RAV4, if your vehicle differs, so may your options)


Once in there, select “Utility” on the left-hand side and you will arrive at this screen.




Now, if you had a NEW Smart Key, the process is relatively straight forward. You can simply click on the “Smart Code Registration” option, which there are 2 of. Both options work, the Classic is older and has less explanations, while the new one has more text and is more user-friendly.

The steps basically consist of; 1.) only have 1 Smart Key in the car at a time, 2.) first start with the Master Key (existing key) and tap it on the ignition button, 3.) remove the key (more than 1 meter from the car) and bring the NEW Smart Key inside, tap it on the ignition button. 4.) Place the NEW Smart Key on the passenger seat until prompted otherwise. 5.) Done.

All of the steps need to be done within 30 seconds of each other, as indicated on the screen (there will be a counter counting down).


The only option that appears to work is the “Smart Code Reset” function. I tried a number of different things but I couldn’t get the used Smart Key to register under any of them except this one (which requires a SEED code, $)

Within the “Smart Code Reset” function, you will arrive at this screen.





You can click on the “Get Pass-Code” button, which will take you to another screen that allows you to copy the 96-digit SEED code (the first one doesn’t seem to let you copy, despite being able to click on it).


Do not close the Techstream window that has the SEED code displayed (the first one).Techstream generates a new SEED code every time you enter the function, so if you close out of it, you lose that session. If you re-enter it, a new SEED code will be supplied and any SEED passcode you received from a calculator will be useless (you can’t re-open a previous session).

NOTE: While you may read in Techstream that its recommended to avoid having wireless devices such are cell phones or your PC’s WiFi on when registering Smart Keys, I had my laptop with WiFi turned on for the entire process and didn’t encounter any issues or interference. With respect to supplying a calculator with your VIN# and SEED code, I would highly recommended that you do all of it through copy-paste instead of manually typing. This would help you avoid any unintentional typos (as that would end up costing you money for a new SEED passcode).

You now need to go to one of those “calculator” websites I mentioned ( (was $15 USD) or (25EUR for 5 codes) and paste your VIN# and SEED number. When I used, the 6-digit passcode was generated instantly.

Reminder #1: Do not close the Techstream window that has the SEED code displayed (the first one).

You can then go back into Techstream and paste the code in.

Reminder #2: Remember to leave the driver’s side door OPEN. Do not close it as it will interrupt the reset procedure. If the function fails for whatever reason, DO NOT CLOSE THE DRIVER’S DOOR. You may still be able to try again or carry through with the remaining steps successfully (other post’s have reported so).



You will then arrive at this screen, where you simply wait for 16 minutes.



I suggest you stay nearby (I was playing a game on my phone) and set an alarm a minute before you expect the timer to end and avoid touching or moving anything (I left the laptop on the car seat and sat on the ground outside, most specifically because my particular cable was defective and had a loose connection, so I wanted to avoid any movement that may risk losing the connection).

Once the timer ends, it will tell you the procedure is complete (successfully)… but you’re not done yet!

In order to register your keys, you now need to select one of the other options (I chose “Smart Code Registration (Classic)”).

Note #1: Previously, if you used this function, you’d choose the first option (“I am just registering keys”) but it would fail if you were trying to register a used Smart Key. Now you will select the third option instead.

Note #2: In case you’re curious, choosing the third option before performing the “Smart Code Reset” will simply result in an error before you even get to load the function. It will produce a message to the effect of “Cannot initialize, reset function not detected”.




(ignore the locksmith bit, I couldn’t find a better picture but will try to upload another one, with the correct option selected)

Here, you will select the third and longest option “I am Registering keys and have replaced the ID Code Box and Smart ECU or have performed Smart Code Reset

When you hit next, you will be asked to eventually tap the key on the ignition button. It has been recommended by other users that the USED key be tapped first and any existing (previously linked) keys to be tapped last.

After this is done, you can click “Register” to finalize the session.


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How to use TIS2000 for Saab (TIS2008-2) for Tech 2

For anyone happy using TIS2000 for Saab (TIS2008-2) follow these steps:

First, get your hands on a Tech 2 handset, CANDI and cables etc. Make sure you are confident that your serial connections are good.

1. You will need a TIS2000 USB key and patch for activation (can be bought for little money or sourced elsewhere)

2. Download and install TIS2000 for GM/NAO. You may be prompted to install the USB key – just follow the steps. When finished, don’t run the TIS2000 program.

3. Download Saab TIS2008-2. Insert into same physical/virtual CD drive you installed the TIS2000 GM from (drive letter needs to be the same).

4. Launch TIS2000 from desktop icon/start menu

5. TIS2000 should detect available update (Saab TIS-2008). OK this and let it run.

6. If you haven’t installed the USB key and patch do this now.

7. Launch TIS2000 and click on SPS or security access to ensure it works

8. Enjoy!

I believe this will allow re-programming of models up to 2008 only, so if you have a later model, you’ll probably need GlobalTIS.

If you’ve bought a clone Tech 2 unit I’d recommend throwing away the supplied flat RJ45/ethernet cable and replacing it with a standard ethernet cable (not cross-over) as mine was faulty and caused many headaches! The correct pin-out is provided by the RJ45 to D9 adaptor. For those interested, only pins 4 and 5 on the RJ45 socket are used (TX/RX).



You may well have a couple of issues getting the software running initially. If your web browser refuses to connect to the TIS2Web service, it’s likely that one of the two GlobalTIS services are not running. To fix this, open the ‘services’ console either by

Start>Run and type “services.msc”


Right-click ‘My Computer” select ‘Manage’ and drill down to the services icon on the left pane.

There are two services that should be running and they’ve got obvious names, something like GlobalTIS and TC6 (not near my TIS PC at the moment) and sit next to each other in the services list. In the information pane they should say ‘started’. If not, right-click and select ‘start’. If this fails with an error, try modifying the registry key below.

To open registry editor Start>Run regedit BE CAREFUL MODIFYING THE REGISTRY – YOU CAN REALLY SCREW YOUR PC UP!!!!!

In the left pane, expand the keys until you find the following

HKLMSoftwareApache Software FoundationProcrun2.0Global TISTC6ParametersJavaJvmMx

Change the value of this key from 0X0000044 to 0X00000200 and exit the registry. Try to restart the service – you should find it now works. Don’t ask me why, I got this fix from another forum – fair play to the guy who found it.

Hope this helps someone!