Immobilizer won't reset, 2003 gs300, yes, former

Okay, I attached a doc for you to review and try that should work UNLESS you have a fault in the security system that will need a scan tool to help us find.

Some parts stores loan/rent the tool too.

I’m really sorry that you’re having this issue and I’m going to help you through it, but please
understand that I (respectfully) don't know your skill level or tools you have to assist us to
diagnose/repair your vehicle. Also understand that I can't see, smell, hear or touch the vehicle
either, so your patience/understanding is appreciated.
JA is a great Q/A site but it does not replace a repair shop so please don’t shoot the messenger if
I have to deliver bad news:)
I am here to help you, so please don’t hesitate to utilize my skills for your benefit.
Thanks so much for using Just Answer too.
Ron

Okay, just what you can and see what happens.

Thanks again, Ron

Okay, hope it works. If not, it's scan tool time.

Thanks again, Ron

I didn't write the doc. If this doesn't work, then we need a scan tool.

Thanks again, Ron

That's correct.

Thanks again, Ron

You need a scan tool, NOT a code reader. Any quality scan tool will work that reads current and pending codes as well as freeze fame data and MODE 6 data too.

Thanks again, Ron

You can get a decent one for about 500.00. If you get a lot of use out of it, then it's worth it. I have 6 to the tune of 45K.

They all do different things too, but a generic one for general use that doesn't do programming is about 500 buck.

Thanks again, Ron

I didn't build these cars sir. They require specialized test equipment to diagnose. I wish there was a magic solution but there isn't. I'm sorry you were wanting an easy fix, but i'm NOT a guesser. The system requires testing. That's why car repairs aren't cheap, equipment and knowledge are very expensive.

Thanks again, Ron