Whats the best way to replace a fob that's only problem is a faulty intermittent unlock button? Can I buy just a good body and swap the key and guts into it?


Thanx...

 

They are usually 2 reason for intermittent button.

1- micro switch button is failing, you can try to solder one onto the board, but It's micro work and difficult.

2- post on battery is broken and pushing button down sometimes makes it contact.

need to pry case open and investigate.

 

man opening that case up is a fawking nightmare lol. I just did one and the old key case looks like it was mauled by a bear, or a guy with a dremel....

 

Abran, the fob in question was obviously the one used primarily as the rubber of the outer case is cracked around the unlock button. I can try and open the case to see if there is an obvious fix... do you have any tips for doing this without the bear mauling effects ArmyRover speaks of?

 

I prefer the badger mauling technique.

I too used to cut the cases open but have a better technique.

open key blade, insert pry tool or wide tip screwdriver into recess behind blade and pry the 2 halves apart. Be sure to only insert the pry tool just far enough to get a bite. At the end of the cavity inside the case is the immobilizer chip. If you pry too deep and violently the case can open and the tool slip, knocking loose the chip. I have never done it been been told that some have.

Immobilizer chip is the charcoal colored rectangle on the thin tip of PCB assembly.

 

I tried the pry technique with my key and maybe I was being a pansy, but I absolutely could not get it to separate. I HAD to end up using a hacksaw (very carefully) to cut around the entire perimeter of the key.

 

I bought an IIDTool BT to program keys for my 2011 LR4, I started with 2 used keys off of ebay. I went through the steps to program the keys and both failed according to the IIDtool, but both now work to operate the car... And when I look at the list of keys the new ones show up. I am going to try a newer style 315Mhz key next. Does anyone know if there is a limit of how many keys can be programmed to the LR4?

 

Interesting. The last time I programmed keys to an LR4 I had to change the KVM as well.

Are the ones you coded 315 Mhz?

 

 

Have any links to the keys you tried specifically the newer style?