Unusual FOB question
07-17-2023, 09:21 AM
#1
Unusual FOB question
I searched but couldn't find the answer to this anywhere. A friend who owns three 993s was wondering if he could make the FOBs he has work with all 3 cars. He only has one FOB for each now and the thinking is if he could do that, he would instantly have a main and 2 backups or every car. Is this even possible? Thanks.
07-17-2023, 10:11 AM
#2
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Hi Edin,
My anecdotal information suggests that the fobs that came with the 993 use a protocol that is incompatible with modern multidevice fobs. I tried this once.
This would make consolidating fobs, not practical.
Andy
My anecdotal information suggests that the fobs that came with the 993 use a protocol that is incompatible with modern multidevice fobs. I tried this once.
This would make consolidating fobs, not practical.
Andy
07-17-2023, 01:35 PM
#3
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Actually, you can do that - just pair the FOB(s) to each car, one at a time, using the procedure in the manual. Pair as many cars as you want. Add a car whenever you want. There are some caveats to using them, but with a little effort your friend can have 3 working FOBs for every car. Someone with a large fleet could actually use this technique to program a MASTER that works in every car and have others unique to the car.
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07-17-2023, 02:23 PM
#4
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Actually, you can do that - just pair the FOB(s) to each car, one at a time, using the procedure in the manual. Pair as many cars as you want. Add a car whenever you want. There are some caveats to using them, but with a little effort your friend can have 3 working FOBs for every car. Someone with a large fleet could actually use this technique to program a MASTER that works in every car and have others unique to the car.
Hi Jay,
I went back and reread the original posting and for some reason, I was thinking multiple cars not all being 993. Yes, a single fob, or up to 4 fobs can be programmed for multiple 993 as long as they were originally delivered into markets that use the same transmitter frequency. For example, they were all USA-delivered cars or all delivered in the EU. Also, some pre-1995 build early cars may have a different remote/alarm system.
Thanks for prompting me to make this correction.
Andy
Last edited by pp000830; 07-17-2023 at 04:47 PM.
07-17-2023, 02:33 PM
#5
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No worries Andy. It's strange that this "multi-car" feature isn't mentioned anywhere in Porsche literature. Maybe they just want to maximize FOB sales. 
07-17-2023, 04:30 PM
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07-17-2023, 04:55 PM
#7
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07-17-2023, 06:36 PM
#8
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Andy thanks!! I have four fobs, two active and two spare. Maybe you can walk me through setting the unused fobs to operate?
07-17-2023, 06:43 PM
#9
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Here is my page on how to program fobs. Print out the form and call me with questions.
https://993servicerepair.blogspot.co...ming-made.html
Andy
Last edited by pp000830; 07-17-2023 at 06:44 PM.
07-17-2023, 06:58 PM
#10
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Hi Harry,
Here is my page on how to program fobs. Print out the form and call me with questions.
https://993servicerepair.blogspot.co...ming-made.html
Andy
Here is my page on how to program fobs. Print out the form and call me with questions.
https://993servicerepair.blogspot.co...ming-made.html
Andy
07-17-2023, 07:26 PM
#11
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07-18-2023, 12:25 PM
#12
Actually, you can do that - just pair the FOB(s) to each car, one at a time, using the procedure in the manual. Pair as many cars as you want. Add a car whenever you want. There are some caveats to using them, but with a little effort your friend can have 3 working FOBs for every car. Someone with a large fleet could actually use this technique to program a MASTER that works in every car and have others unique to the car.
07-20-2023, 12:00 PM
#13
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A couple things:
1) All cars within range will respond to the FOB.
This could be useful- for example if you want to lock all unlocked cars with a single FOB push. But more than likely, some will be locked and some will be unlocked, meaning the FOB will just flip all of them to the opposite state - probably not what you want.
2) If a FOB is pressed more than 256 times out of range of any car it is paired to, that car will stop responding to that FOB. The FOB is still paired to the car, it's just gotten out of sequence with the immobilizer (the other paired FOBs are unaffected). Not a big deal: just press the FOB near the car 3 times for 2 seconds. BTW, this issue is not something unique to multi-car pairing, it's just more likely to happen because a FOB might be used exclusively with one car for an extended period of time.
1) All cars within range will respond to the FOB.
This could be useful- for example if you want to lock all unlocked cars with a single FOB push. But more than likely, some will be locked and some will be unlocked, meaning the FOB will just flip all of them to the opposite state - probably not what you want.
2) If a FOB is pressed more than 256 times out of range of any car it is paired to, that car will stop responding to that FOB. The FOB is still paired to the car, it's just gotten out of sequence with the immobilizer (the other paired FOBs are unaffected). Not a big deal: just press the FOB near the car 3 times for 2 seconds. BTW, this issue is not something unique to multi-car pairing, it's just more likely to happen because a FOB might be used exclusively with one car for an extended period of time.