Hey, sorry if this has been posted before. There is a lot of info on here about the security systems and it's hard to filter though. In other words, I did a search but didn't quite find what I need.

I'm thinking about installing a remote start on my '04 Expy. I also have an '04 Mustang GT and the keys look entirely different. I've heard a lot of talk about having to leave a key in the car if it has the coded key. My Mustang has a fatter key with the key ring hole offset to one side and you can see the outline of a plastic plug on the head of the key that I suppose houses the transponder chip. On the other hand, my Expy key looks like a normal key with a plastic molded head. It's narrow and the key ring part goes all the way across.

Did some Expys come without the anti theft coded keys? I've installed several remote starters in the past and found that the ones with the anti theft keys were a pain. If my Expy doesn't have one then I will get a specific model of remote starter that I like and can easily install. Thanks for the info!

 

Yes, they all have the Ford PATS. You do not need the extra hidden key anymore. All you need is a DEI 555F Universal Immobilizer Bypass Module in addition to the remote start unit.
http://www.dealercostcaraudio.com/di...555f555fw.aspx

 

Good info. I gotta buy a couple of them.

 

Would such a module also make it so the actual keys don't have to be programmed? Without a remote start, just regular ignition.

 

I don't see why not.

 

Really? So a $15 module would keep everyone from having to pay the dealer $100 to program your key if you only have one? That is interesting.

 

That's the whole idea behind the bypass module. The PATs is no longer a working device. the after market alarm is all you have as an anti theft system.

 

i just ordered the dei 556uw the remote starter kit has a wire that is suppose to attach it or with the bypass does this wire need to be connected ---if it connects then pats is only disabled during remote start

 

Well, I got my DEI 556 universal bypass in the mail today. I read the instructions and you have to place a spare key inside it for it to work. So, how is it that people have done this bypass without having to use a spare key inside the truck somewhere?

 

It's the DEI 555F that's used to bypass the Ford PATS without having to use a key. A DEI 556uw uses a key.

 

Well, crap. Thanks for the info! Somehow I wound up with the 556uw after following the link you posted. I'll try to see what I did wrong.

 

I just did a google search on the DEI555F and from what I read you will need a second programmed key to program the system, per DEI.

 

So you have to leave a key in the truck? I'd say if I were going to do that, I'd mutilate the teeth first.

 

The answer to the thread's title can be found here: http://www.motorcraftservice.com/vdi...ts_job_aid.pdf
This a wall chart intended for use in a dealership that lists all vehicles and PATS applications up through 2010 models. It looks best if you can print it on 11x17 paper.

No. These bypass devices do not defeat or eliminate PATS, they serve to satisfy the PATS system during remote starting. The 555F, for example, contains an RFID chip with a unique code number that gets added to the list of authorized keys, same as an additional key's ID would get added if programmed. The 555UW requires a correctly chosen PATS key and uses the key's RFID chip for the code. During the remote start sequence, the starter module will "tickle" the bypass module so that it transmits its ID code to the PATS antenna ring that surrounds the key cylinder. It is this transmitted code, which must have been previously programmed, that satisfies PATS and enables engine operation. Depending on the version of PATS (see chart above), you still need one or two valid keys to add the bypass module.


Only if you can figure out a way to "tickle" the bypass module to transmit its code when the ignition key is turned to RUN. The PCM/HEC still needs to receive a valid RFID code and the bypass module only sends it whenever the module receives the correct signal. If you only have one key, you can always take the shortcut of securing that one key to the antenna ring and use a simple mechanical cut key for normal operation. As long as you never tell anyone what you've done, the odds of theft occurring are minimal as there are no apparent or visible signs that the system is not original.

No. Expeditions have always had PATS since the model was introduced in 97. See photos of various OEM key styles on chart referenced above.

Make damned sure you have a good spare before doing so....

 

Wow. Nice info. Looking at that chart, I only need 1 key for my 98. And the procedure is to simply turn original ket to RUN and off, then the new key to RUN and then off.

If I wanted to program a third key, would I just insert third key and turn to RUN and OFF, or do I have to start over again with the original?

I guess what I am asking is, does this procedure REPLACE all progarmmed keys, or simply add one to the list?