100 series master key thread (1 Viewer)

[stiover]

Here's what i did to program the immobilizer

Get in the truck and close all doors

Insert your CURRENT MASTER key into ignition but do not turn, just stick it in for a second then pull it out, repeat this 4x

Then insert the CURRENT MASTER key into ignition and leave it there

Next open and close the driver's door 6 times, you need to open it enough to hear the little chime ding ding

After that remove the master key, you should see your security light to the right stay solid red. That means it's ready to accept a new key.

insert your eBay key that you just had cut and just leave it there. The solid red light will now start to blink to program the chip in the new key. After 40-50 seconds the light will stop blinking and then you can remove the key and re insert to start the vehicle. If the blinking light doesn't go away, then you got a busted chip or wrong key.

After all the different programming posts I've found, this is the one that has worked. The issues I had above were fixed by this process. Thanks a lot!

 

[3lcs]

Great information here.

 

[gwilson]

I have repaced both my original keys due to breakage. One is a master key and the other shows up as valet. Can I use the master to turn the "valet" into a master as well?

 

[menancyandsam]

I have repaced both my original keys due to breakage. One is a master key and the other shows up as valet. Can I use the master to turn the "valet" into a master as well?

Yes, via techstream its easy.

 

[gwilson]

Does techstream work with 1998 model?

 

[menancyandsam]

Does techstream work with 1998 model?

If it has a OBD-II port, which it should, yes.

 

[gwilson]

great! now I have to figure out how to make techstream work on a Mac.

 

[gwilson]

I programmed my master fob to work. My valet is a replacement key. When I go through the programming steps, everything works until the end. I hold lock/unlock 1 second, release, then lock for 2 seconds. The door locks, then cycles twice and the fob still won't work. Any suggestions?

 

[reduc]

There are a lot of posts about this. I am going to try to make one thread with all needed key information I can think of. I am not much of a writer so I will try to explain the best I can.

Our 100 series Land Cruisers and Lexus Lx470s all have an ignition immobilizer. What this system does is cut off spark and fuel to the engine unless the correct key is used to start the engine.

There are 2 different kinds of keys, a master and a sub (valet) key. To add new key codes into the ecu a master key is required to allow the ecu to enter programming mode.

If all keys are lost the ecu will need to be reset.

The best way to tell if your key is a master is to watch the security light while you insert the key into the ignition switch. If the light goes out as soon as the key is inserted you have a master, if it stays lit for a second or two your key is a sub.

I think it is ok to advertise my services here. If not someone please let me know.

Here is my little ad for flashing services:

ECU flashing for 100 series

I do ECU flashing for 1998-2001 100 series Land Cruisers and Lexus LX470. If you only have a valet key or have lost all your keys I can help.

forum.ih8mud.com

Do you still provide this service, and if so, what is the cost? 2001 LX470 with only valet key.