How to add an blank keyfob for 2010 prius?

[drndmc]

Is there anyone know how to add a brand new keyfob to ther 2010 prius?
The condition is that 2010 prius had only 2 keyfob, but there are 3 people to use this vehicle.
Is there any possible procedure to add one new keyfob?

[PriusRoadWarrior]

You are out of luck. I talked to the tech specialist at one of the Dealers and he said there is just programing for 2 fobs. If you lose one, it can be replaced by deleteing that one on memory and activating the new FOB. I know, it is stupid, as I also wanted a spare FOB.

[drmalone]

That's interesting. I had 4 for my 2006 (which I really didn't need). When I purchased the new one I asked for one extra and was told I could do it, for $450.00. I declined.

[qbee42]

This would be a complete surprise if you couldn't use four fobs, as you can with the Gen II Prius. We will have to wait for one of the new 2010 owners to answer this one.

Tom

[rachaelseven]

I just had a look in the Techstream software at the add key function (yes, I have a working Techstream service tool emulator). It does definitely say that there is a limit of 2 keys, so the above-referenced tech specialist may well be right. Nevertheless, I was able to at least start the procedure to add another key. Since I didn't have a third to add, I don't know if I could have completed the procedure or not - all I know at this point is that it said there was a maximum of 2 and it let me access at least the first couple steps of the procedure to add another key. It is possible at least that the 2 key limit is not actually right and it only says that because there are currently 2 registered keys. If anyone has a spare they want me to try (I'm not shelling out $300 for one), send it my way and I'll let you know if it can be added.

[RRxing]

Per the TIS tech information for the Smart Key System Key Code Registration, a total of seven (7) keys can be registered.

[rachaelseven]

Originally Posted by RRxing

Per the TIS tech information for the Smart Key System Key Code Registration, a total of seven (7) keys can be registered.

Confirmed. I just checked TIS also and the repair manual does indeed claim 7 keys can be registered. So it seems that the Techstream software has a bit of a 'glitch' that shows whatever number of keys are currently registered as the maximum. I can see where that would have given the technician a wrong impression, but given the conflicting information in TIS and the unlikeliness of a 2 key limit, I would rely on the 7 key limit from the repair manual until proven wrong.

As for how you do it, you probably don't do it yourself. Only the dealer or someone with a Techstream unit can register the key to the car. The procedure is pretty clearly outlined in Techstream, but basically you walk through the steps of holding up each key to the ignition button and clicking next on various windows onscreen. You do need an existing key to perform the procedure, as far as I can see, but it is otherwise pretty straightforward if you have the Techstream.

[RRxing]

Unless I'm reading this wrong, it looks like up to seven can be programmed...

[drndmc]

So, it would be impossible to add a fob without Techstream unit, right?

[rachaelseven]

Originally Posted by RRxing

Unless I'm reading this wrong, it looks like up to seven can be programmed...

Yes, that's how I read it too. I read the same 7 key number in a different part of the repair manual procedures section. But oddly enough, when you go to the add-a-key screen in the software, if you have two keys already, it says there is a maximum of 2. Like I said, probably nothing more than a software glitch - I tend to believe the repair manual.

Originally Posted by drndmc

So, it would be impossible to add a fob without Techstream unit, right?

Yes, that's my understanding. There may be some aftermarket devices for it other than the Techstream (I don't know of any though), but you definitely cannot do it without some sort of tool that links into the ECU to perform the procedure.