Mauser

Nope, but it is easy to do. You can swap chips or virginize.

RobHaynes

I'm not real tech savvy, but Ill also try anything once. I watched the video on this thread. Did he use special software? You mentioned removing the chip and virgin. Whats the difference?

Mauser

You would need special software to program a chip. If you didn't have immobilizer problems I would swap IC900 from your bad ecu to the new one. If your immobilizer was bad or you want to reset the ecu to accept new keys you can write the virgin files to a chip. For the RX IC900 still needs to be removed to program it. If you want a chip with virgin code written to it I canl send you one.

RobHaynes

What would you charge me for the virgin chip?

And would I just pull one chip off and put the new chip on? Then insert a new key to program?

Mauser

Nothing. Just help someone else somehow. Message me an address and I will get it out.

Yes you pull the old one off and put the new one on. Just insert keys to program.

Mauser

For anyone looking. Here is the code to write to RX300 eeprom to virginize:


Here is a video I made showing how to swap the chip:

wmj259

Since a lot of people don't own a rework station. If you don't own one I suggest to take it to a computer repair shop or someone who may have that and have them swap the chip out. Trying to remove it with a soldering iron will have a higher chance of ripping the pads off.

Suxelbulcx

This seems to imply that keys are not programmed, as many say, but that keys are paired. That no information is added or changed in the keys rfid. Is this true?

Mauser

Yes, the transponder code in the keys is fixed. The keys are just paired with the immobilizer.

Dipri

Hi,

I need to change the ECU on a 2002 Toyota Corolla.

I need to desoldering the eeprom in order to write it. The first time I did it I damaged the ECU.
Now, I have bought a second ECU and I have the same problem

I have read the memory of the new ecu, and I have the codes of the keys.
It is possible to grab this codes on a new key on a locksmith?

Thanks,
Diego

Mauser

Not real sure I am understanding correctly.

Are you asking if it is possible to read the code from a new key and manually add it to the eeprom? If so, yes. If you have the proper equipment you can read the transponder code of a key. Yes, most locksmiths that do automotive work should have the equipment to do it. You can buy transponder readers on ebay.

Dipri

Thanks for your reply.

I can read a new ECU but I can't write it without desoldering.

I have damaged one ECU in the process of desoldering-soldering the EEPROM
Now I have a second ECU. I have read on it the code of the losen keys. Instead of virginizing the EEPROM, i am considering go to the locksmith with the code in order the grab this code on a key.

Anybody knows if this would work?

I think it would be easier than virginize the EEPROM


Thanks
Diego

Mauser

Ok. Now I get it. Yes, the eeprom has to be removed to write to it.

If you have a hot air rework station removal is easy. If not it can be difficult. What was damaged? How are you removing it?

Yes, if you have the code it can be written to a blank writable transponder. A good locksmith should have the equipment.

Every time I have tried to even read an eeprom in circut it has been corrupted, I have had to remove them to read them correctly.

Dipri

Do you know how can I check if I have read it correctly?

Mauser

The only way I know for sure is to remove it. My problem was that every time I read the eeprom in circut I got different values.