Hi all,
I have a 3SGTE 4gen AT swap. No fault codes, everything seems to be good but, when the key is IG ON, the CEL flashes quickly! It doesn't stop.

I've heard that it means no codes. But, I don't have the TC ECU PIN connectes to anything. I thought that TC ECU PIN to ground turns on the diagnosis cel mode, but I haven't got anything connected to that wire/pin.

What does it mean? Maybe I'm in diagnosis mode and I can escape?

Thank you very much, I hope we find the answer to this mystery.

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