Originally Posted by Arch11b

Hi guys, i need help with remote central locking on my toyota aristo.

I have jdm aristo which has an ecu with no imobillizer.
car was bought with only valet key so i dont have remote central locking. Cl works well from key.
i got a blank and 2x second hand transponders for central locking from mk2 gs300 pre facelift models but i cannot get them to register to car.

I have tried every programming procedure on internet with no luck.
I bought techstream and try to register them with help of techstream but procedure fails every time.

i have a very good breakers yard next to me which has quite a few lexus gs300 breaking together with keys. So parts wouldnt be a problem.

can someone please point me in direction what exactly do i need to get to get them working as im losing my mind over not being able to use remote central locking.
p.s. i have also tried another module in drivers door just in case if thats the culprit but sidnt get far, as aristo has electrically foldable mirrors and replacement module from gs300 werent able to control mirror on drivers side and make it fold, so i swapped it back out for oem one.

any ideas guys?

Originally Posted by maligned98

I can't recall in Techstream whether you can erase all old keys and just program new ones. I have a feeling you still need a working master key to make a new one.