While it would be the same price to DIY (if I can't find a cheaper key), my goal is to find a cheaper key
Also, I know that getting the Techstream software (and cable) will be useful for me to diagnose any other issues with the RAV4 as well as any further customization (for example, our rear-view camera stopped working. We took it to the dealer to diagnose during an oil change but they said that they couldn't figure out what was wrong. They asked for us to pay ~$85 just to diagnose what's wrong, without any guarantee that they would figure it out)
So on with the search, I have to agree with you that the Reset function requiring the passcode is to remove all keys and re-register them. Here is a Toyota Technical Service Bulletin document I found on the entire procedure
. There's nothing new in it, but it does confirm what was previously mentioned. A quick excerpt from the "Introduction":
"The Immobilizer and Smart Key Reset is a feature that allows the registration of new keys when all master keys are lost. Once the system is reset, all previously registered keys will be erased. Follow the procedures in this bulletin to reset a vehicle Immobilizer or Smart Key system."
Its interesting to see how the function is performed internally, but I bring it up to highlight that its designed for when all keys are lost and presumably, when there is no key to even start the car. My suspicion could still be wrong (about being able to add a "used" key some other way) but I'll keep digging.
I found another document (in very poor English) that refers to Key Programming
. Its hard to follow but I did note a peculiarity.
Under Page 7, it mentions that during the Key Programming stage using a Master Key
, that once the Master Key is provided (first stage) to leave it outside
of the car. Then when providing the second key (the key being registered) to leave that one on the passenger side of the car (inside the car
). This is contrary to what the individual in the Youtube video did (see post
), and could possibly explain the error (especially since the Techstream software doesn't mention it anywhere on the screen prompts)
, and again especially since they video author mentions he did the function again but wasn't sure what changed (i.e. he may have set the key aside this time).
I had another note to make, but I can't find the source (ATM). It has stated that in order to add keys, the car needed to have at least 2 to begin with. This could also explain why other users where having issues adding keys when they were only given 1 with their car.
(I could understand this as a security feature, where if the car was only intended to have 1 key, you would need to do a full reset and associate 2 or more)
I have to stress, this is all speculation on my part. I am not an expert and do not claim to be one, I'm simply trying to figure out as much as I can so that I can make an informed decision before I put money on the table.