remote entry -key fob programming

I have a 1999 Plymouth Voyager and my wife has a 2000 Dodge Caravan.

Is it possible to program my key fob so that it will also open my
wife's car?


John Keith

"John Keith" > wrote in message
...
> I have a 1999 Plymouth Voyager and my wife has a 2000 Dodge Caravan.
>
> Is it possible to program my key fob so that it will also open my
> wife's car?
>
>
> John Keith
>

No

maxpower wrote:

> > I have a 1999 Plymouth Voyager and my wife has a 2000 Dodge
> > Caravan. Is it possible to program my key fob so that it will
> > also open my wife's car?
>
> No

It's not the fob that's programmed. It's the computer in the vehicle.

I would think it's possible to program both vehicles to recognize
each-others fobs.

The only reason why this wouldn't work is if the fob's operate on
different frequencies or use different coding techniques.

"MoPar Man" > wrote in message
...
> maxpower wrote:
>
> > > I have a 1999 Plymouth Voyager and my wife has a 2000 Dodge
> > > Caravan. Is it possible to program my key fob so that it will
> > > also open my wife's car?
> >
> > No
>
> It's not the fob that's programmed. It's the computer in the vehicle.
>
> I would think it's possible to program both vehicles to recognize
> each-others fobs.
>
> The only reason why this wouldn't work is if the fob's operate on
> different frequencies or use different coding techniques.

Different part numbers, different software. if the part numbers were the
same it could be done.

>"MoPar Man" > wrote in message
...
>> maxpower wrote:
>>
>> > > I have a 1999 Plymouth Voyager and my wife has a 2000 Dodge
>> > > Caravan. Is it possible to program my key fob so that it will
>> > > also open my wife's car?
>> >
>> > No
>>
>> It's not the fob that's programmed. It's the computer in the vehicle.
>>
>> I would think it's possible to program both vehicles to recognize
>> each-others fobs.
>>
>> The only reason why this wouldn't work is if the fob's operate on
>> different frequencies or use different coding techniques.
>
>Different part numbers, different software. if the part numbers were the
>same it could be done.
>

OK, as usual I didn't provide enough info on the original post.

The fobs for the two vehicles were physically simialr so I thought
they might be identical. The facts a

Chrysler P/N: 04686481AA Same for both
Model/FCC ID: GQ43VT13T Same for both

So my first assumption is that both fobs use the same frequencies and
the same coding techniques.

And I guess I knew that it was the computer in the vehicle that is
programmed from what info I was able to find on the internet, so I
misspoke when I asked if the fob could be programmed.

But then the question is can this computer recognize codes from two
different fobs? The last responder suggests that if the part numbers
are the smae it can be done. So, can anyone point me to the web page
that has the process for 1999-2000 vehicle? (I'll do a little more
searching, but my first pass did not turn up anything for my vehicle.)

And while I'm thinking about it another question comes to mind. My
wife's car originally has 2 fobs that work with it. Are these 2 fobs
coded identically or is the vehicle computer capable of responding to
>2 different encoded fobs?

Thanks for the info so far, hope I can get a little more.

John Keith

MoPar Man wrote:
> maxpower wrote:
>
>>> I have a 1999 Plymouth Voyager and my wife has a 2000 Dodge
>>> Caravan. Is it possible to program my key fob so that it will
>>> also open my wife's car?
>> No
>
> It's not the fob that's programmed. It's the computer in the vehicle.

Though you might be right, that seems counterintuitive.

I have two 2nd gen. LH cars sitting in my driveway that use fobs of the
same part number. If I took the fob of car no. 1 and followed the
programing procedure using car no. 2 and its fob, then both fobs would
control car no. 2, and car no. 1 would no longer respond to either. If
what you're saying is true (that it is the car's computer that gets
programed), that doesn't sound possible. Or would in fact both cars
respond to what was car no. 1's fob after the reprograming?

Bill Putney
(To reply by e-mail, replace the last letter of the alphabet in my
address with the letter 'x')

John Keith wrote:

> OK, as usual I didn't provide enough info on the original post.
>
> The fobs for the two vehicles were physically simialr so I thought
> they might be identical. The facts a
>
> Chrysler P/N: 04686481AA Same for both
> Model/FCC ID: GQ43VT13T Same for both
>
> So my first assumption is that both fobs use the same frequencies and
> the same coding techniques.
>
> And I guess I knew that it was the computer in the vehicle that is
> programmed from what info I was able to find on the internet, so I
> misspoke when I asked if the fob could be programmed.

That was news to me too - I'd still like to have that confirmed. I was
under the impression that when you went thru the reprogaming procedure
with a vehicle and a working fob to get a second fob working with that
one vehicle, that the second fob was changed (i.e., if it previously
worked with a different vehicle, it no longer would work with its
original vehicle) - I might be wrong.

> But then the question is can this computer recognize codes from two
> different fobs?...

The answer to that is yes (regardless of whether it is the fob that
changes or the computer).

> The last responder suggests that if the part numbers
> are the smae it can be done. So, can anyone point me to the web page
> that has the process for 1999-2000 vehicle? (I'll do a little more
> searching, but my first pass did not turn up anything for my vehicle.)

If you have your owner's manuals, it should be in there.

> And while I'm thinking about it another question comes to mind. My
> wife's car originally has 2 fobs that work with it. Are these 2 fobs
> coded identically or is the vehicle computer capable of responding to
>> 2 different encoded fobs?

2 fobs will work with one vehicle.

> Thanks for the info so far, hope I can get a little more.
>
> John Keith
>

Bill Putney
(To reply by e-mail, replace the last letter of the alphabet in my
address with the letter 'x')

Bill Putney wrote:

> > The fobs for the two vehicles were physically simialr so I
> > thought they might be identical. The facts a
> >
> > Chrysler P/N: 04686481AA Same for both
> > Model/FCC ID: GQ43VT13T Same for both
> >
> > So my first assumption is that both fobs use the same
> > frequencies and the same coding techniques.

I'd say that all 4 fobs (assuming you have 2 for each vehicle) would
work interchangibly for both vehicles.

Maxpower is invited to comment given the new information above.

> That was news to me too - I'd still like to have that confirmed.
> I was under the impression that when you went thru the
> reprogaming procedure with a vehicle and a working fob to get
> a second fob working with that one vehicle, that the second
> fob was changed (i.e., if it previously worked with a different
> vehicle, it no longer would work with its original vehicle)
> - I might be wrong.

I went through this a few months ago.

One set of keys for my '00 300m was stolen - along with the fob.

I ordered a new fob and key from the dealer. At the dealer, they
reprogrammed the car's computer so that:

1) the car would no longer respond to the missing fob and
the ignition key-sentry system would no longer function
if the missing key was attempted to be used to start the
car.

2) the computer was programmed to respond to the new key and fob.

3) our other key and fob for the car remained active in the
car's computer.

If the stolen key was used to manually open (unlock) the doors while
the car alarm was armed, I'm told the alarm would disarm as normal.
That would not be desirable. To prevent disarming, I can simply
disconnect a wire in the door that tells the computer that the door
was unlocked manually.

> > But then the question is can this computer recognize codes
> > from two different fobs?...

Yes, because in my case, I had 2 fobs for the car (every new car comes
with 2 sets of keys and fobs) and all fobs (and keys with electronic
sentry-key) are unique.

> > So, can anyone point me to the web page that has the process
> > for 1999-2000 vehicle? (I'll do a little more searching, but
> > my first pass did not turn up anything for my vehicle.)

I've seen the dealer do it, and it requires some large-ish
computer-looking thing that gets plugged into the OBD connector under
the steering wheel. I don't think it can be done just by pressing the
right combinations of buttons on the dashboard or console.

> > And while I'm thinking about it another question comes to mind.
> > My wife's car originally has 2 fobs that work with it. Are these
> > 2 fobs coded identically or is the vehicle computer capable of
> > responding to 2 different encoded fobs?
>
> 2 fobs will work with one vehicle.

ALL fobs are unique, and so are the electronic parts of the keys (if
you have the sentry-key system).

It's a matter of telling the car's computer which fobs and keys to
respond to.

It may also be a matter of how many different fobs and keys the
computer can be programmed for.

>So, can anyone point me to the web page
>that has the process for 1999-2000 vehicle? (I'll do a little more
>searching, but my first pass did not turn up anything for my vehicle.)

When all else fails RTFM! The following info was found in teh Owner's
Manual fo rthe 2000 Caravan:

1. Turn ignition switch to the ON postion and leave vehicle in park.
2. Using a previously programmed transmitter, press the UNLOCK button
for 5 to 10 seconds. While the UNLOCK button is being pressed, press
the PANIC button and release bothbuttons simultaneously. You will hear
a chime sound to signal you that programming on the new transmitter(s)
may occur.
3. You may program up to 4 transmitters for your vehicle within a 30
second timed window. Press and release both LOCK and UNLOCK button of
a transmitter at the same time; then press any of the buttons once,
you will hear a beep when the transmitter has been successfully
programmed. A chime will sound when the 30 seconds is over, or if you
turn the ignition off.
4. You must repeat step 3 for all transmitters that will be used with
this vehicle (up to 4 total).

When it's not below freezing out in the garage I'll give the process a
whirl.

Oh, I did find a similar process on the web, but it did not include
the step to press both LOCK and UNLOCK buttons at the same time.

John Keith

>So, can anyone point me to the web page
>that has the process for 1999-2000 vehicle? (I'll do a little more
>searching, but my first pass did not turn up anything for my vehicle.)


When all else fails RTFM! The following info was found in teh Owner's
Manual fo rthe 2000 Caravan:

1. Turn ignition switch to the ON postion and leave vehicle in park.
2. Using a previously programmed transmitter, press the UNLOCK button
for 5 to 10 seconds. While the UNLOCK button is being pressed, press
the PANIC button and release bothbuttons simultaneously. You will hear
a chime sound to signal you that programming on the new transmitter(s)
may occur.
3. You may program up to 4 transmitters for your vehicle within a 30
second timed window. Press and release both LOCK and UNLOCK button of
a transmitter at the same time; then press any of the buttons once,
you will hear a beep when the transmitter has been successfully
programmed. A chime will sound when the 30 seconds is over, or if you
turn the ignition off.
4. You must repeat step 3 for all transmitters that will be used with
this vehicle (up to 4 total).

When it's not below freezing out in the garage I'll give the process a
whirl.

Oh, I did find a similar process on the web, but it did not include
the step to press both LOCK and UNLOCK buttons at the same time.


John Keith