I have just bought a 1990 LS400, but the remote locking doesn't work. ( Seller told me it needed a new battery...)
It turns out that some plonker has drilled a hole through the corner of the key ( and through the PCB inside ) and threaded the keyring through it.
As luck has it, the damage is not to the programmed IC inside. ( The dealers tell me I need a master key - £154 , a new ECU as my key doesn't work £600+ plus labour for programming !!) I don't think so!
Does anyone know where I can get a second hand key ( written off car maybe? ) so I can use it as a PCB donor to transplant the IC onto?
Has anyone else been through this?
All help appreciated.