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Robcokiwi · 08-23-2020, 11:40 PM

If anyone is looking to buy a used module beware. This may be common knowledge but I was not aware of it.
To quote senior member Opie "There are 3 components that work as a "System" for the Immobilizer to work correctly and allow the car to start. If swapping parts between cars all 3 components must be swapped/used in order for proper communication to start the car.
The main body ECU (network gateway ECU) *also called the BIU, it's the black box attached to the interior fuse box, the combination meter (gauge cluster) and the keys (keys will require swapping the ignition lock cylinder and the door/trunk lock cylinders).

If any of the parts are used/installed individually the system will not allow the car to start. Once any of these components are programmed together, they must stay together and cannot be reprogrammed to work individually."

If you have to replace one of these modules please do not waste your money and buy a used one. Buy a new one and take it to the dealer to be programmed. The other option is to get all 3 components from a donor car and install them together. Do not power up the vehicle until all modules are installed.

I hope that helps save someone from a mistake.

08-23-2020, 11:40 PM	#1
Robcokiwi Member Join Date: Dec 2018 Drives: 2017 Toyota 86 Location: North Carolina Posts: 31 Thanks: 9 Thanked 4 Times in 3 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Do Not Buy/Install Used Modules If anyone is looking to buy a used module beware. This may be common knowledge but I was not aware of it. To quote senior member Opie "There are 3 components that work as a "System" for the Immobilizer to work correctly and allow the car to start. If swapping parts between cars all 3 components must be swapped/used in order for proper communication to start the car. The main body ECU (network gateway ECU) *also called the BIU, it's the black box attached to the interior fuse box, the combination meter (gauge cluster) and the keys (keys will require swapping the ignition lock cylinder and the door/trunk lock cylinders). If any of the parts are used/installed individually the system will not allow the car to start. Once any of these components are programmed together, they must stay together and cannot be reprogrammed to work individually." If you have to replace one of these modules please do not waste your money and buy a used one. Buy a new one and take it to the dealer to be programmed. The other option is to get all 3 components from a donor car and install them together. Do not power up the vehicle until all modules are installed. I hope that helps save someone from a mistake.