Tenebris

Hello,

I've got a 1999 Lexus SC300 that has been 1JZ swapped. It's got a JZX110 Non-immobilizer ECU.

I recently got an aftermarket key for the SC300 (Was using a bit of metal bolted to a quarter before!), but the fob does not work to lock/unlock the doors.
I've gone through the steps to program the key (Something like opening the door and pressing lock/unlock 5 times), and the car will go into programming mode. But, once I get to the part where I press the button on the fob, the doors cycle twice which means that the key was not accepted. Does anybody know why that might be the case?

Thanks for any help!

4rcedfed

Does your Fob have fresh batteries? I had the same issue, and replaced the batteries and hit the buttons while bringing the fob closer to the ignition key switch. Worked for me after that.

Blkexcoupe

iTrader: (8)

2 things to check.

1. Is the FCC ID of the key correct?
2. The car will only allow 4 keys to be programmed. If you already have more 4, then all keys will have to be erased and you have to add them all back.

Tenebris

I'm assuming the FCC ID is correct, as it's communicating with the car?
How would I know if 4 keys were already programmed? How would I clear them?

Thanks!

Blkexcoupe

iTrader: (8)

https://www.clublexus.com/forums/per...ogramming.html

There is a lot of info about programming the keys in that thread.