Key won't lock door after new battery install

[BroLip]

Hello Everyone,
I put new batteries in the key of my 1999 LC and now it won't lock, unlock the doors and the panic button doesn't work. I talked to the dealer and they want $75 to "see" if they can fix it.
Anybody got any ideas?

 

[Doodle]

At a guess, it's lost the code and needs reprogramming. Not exactly difficult, and hardly a $75 job.

 

[BroLip]

I figured that. Gotta love a car dealership. Is it something I can do?

 

[stumog]

Did you put the battries in the correct way round? Start with the easy things.
Stu

 

[Doodle]

I would expect the reprogramming instructions are online somewhere.

 

[Shayne]

I vaguely recall something like this happening to helen's rover , i phoned rover expecting a ludicrous bill but they just said something like , put the key in the door and turn it left 3 times - right 4 times - and left again twice , and that was it fixed . Phone and ask you never know ?

 

[BroLip]

I double checked the battery and I called the dealer already. They won't even look for less than $75. I found several things online but most of those are for programming a new key and didn't work on mine. I'm gonna look online to see if I can find a locksmith locally that knows.

 

[Shayne]

How about phoning a different Toyota dealer and telling them your alarm went off for no reason and now your locked out of your car , that might get a code out of them ?

 

[Rob Cowell]

Try holding both buttons (lock / unlock) at the same time for a few seconds when stood next to the car. I think that's what I had to do when replacing the batteries in my 120 fobs.

 

[warrenpfo]

Have an ask on the IH8MUD forum there is bound to be someone local to you who can help or advise.

If you where close to me I would lend you my computer but you are the other side of the pond.

 

[Shayne]

Found this but its for a 90 series , worth a try though http://www.lcool.org/technical/90_series/security/prado_key.html

And just thought of something else , the locksmith/shoe repair set up in my local Morrisons supermarket told me last week they can electronically duplicate many but not all keys , if i had your problem i would take the key down and have him scan the chip , perhaps the code is actually in the key itself ?

 

[Doodle]

Won't work on a 100 (as I found out a couple of weeks back) and that only deals with the transponder chip for the ignition, not the remote locking.

 

[Shayne]

Removing the battery shouldn't cause any problems as it is often done as a safety measure , why not write a letter of complaint to Toyota head office . My Mrs wrote to Hyundai complaining that her steering rack failed 3 months after a full main dealer service . She got a full refund for the repair .
Dealers make excuses to print money whereas manufacturers spend millions on advertisement and are quick to understand that bad feedback from an average bloke with a computer is 10 times more powerful than any fancy advertisement .

 

[uHu]

Either the new battery is faulty, or the key chip is faulty, or there's a lack of contact between the two.
There is no reprogramming to do or any chance of the ECU loosing it.
Last possibility: The problem was in the car all the time - no need for battery change...

What's the voltage of the button cell battery?