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Let's discuss the key fob transponder chip(s)

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Old Dec 9, 2018 | 05:16 PM
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Default Re: Let's discuss the key fob transponder chip(s)

Originally Posted by pizzaguy

IT is bad enough that Kenwood is now building stuff in Singapore, Japan and other countries in an attempt to thwart China's efforts. If you google "Motorola versus Hytera", you can see how far this has gone.
You say it is bad that a Japanese company is making equipment in Japan, imagine what the Japanese workers think of making it in the US.
The future belongs to China, it is an awakening giant. Let us hope that the US military complex does not decide to start a shooting war as they see their power eroding.
 
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Old Dec 10, 2018 | 08:04 AM
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Default Re: Let's discuss the key fob transponder chip(s)

Duplicate.
 

Last edited by Padgett; Dec 10, 2018 at 08:07 AM.
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Old Dec 10, 2018 | 08:06 AM
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Default Re: Let's discuss the key fob transponder chip(s)

And meanwhile back at the SKREEM, don't forget that the module also handles the other fob activities like locking and unlocking doors & gas tank cover. Best course is to simply change the program default to RFID key success.
BTW my replacement cover/key works so well that my old back cover with the badge just snapped to the new one.
 
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Old Dec 10, 2018 | 08:19 AM
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Default Re: Let's discuss the key fob transponder chip(s)

Originally Posted by Padgett
And meanwhile back at the SKREEM, don't forget that the module also handles the other fob activities like locking and unlocking doors & gas tank cover. Best course is to simply change the program default to RFID key success.
BTW my replacement cover/key works so well that my old back cover with the badge just snapped to the new one.
Sorry but you are confused about the functions of the SKREEM. It only verifies that the correct key is being used to start the car. Those other locking / unlocking functions you mention are handled by the central control locking pump.
 
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Old Dec 10, 2018 | 12:32 PM
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Default Re: Let's discuss the key fob transponder chip(s)

Originally Posted by RED DOG
Sorry but you are confused about the functions of the SKREEM. It only verifies that the correct key is being used to start the car. Those other locking / unlocking functions you mention are handled by the central control locking pump.
Sorry but I think you are confused, the SKREEM and the BCM work together to open doors etc.
I am working on a PDF explaining the system, it should be done in a few hours.
The BCM tells the pump what to do after the SKREEM says it is OK.
 
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Old Dec 10, 2018 | 01:15 PM
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Default Re: Let's discuss the key fob transponder chip(s)

If the SKREEM needs to read the chip before lock/unlock how does the ring read the signal while you are standing in the driveway?
 
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Old Dec 10, 2018 | 01:53 PM
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Default Re: Let's discuss the key fob transponder chip(s)

Originally Posted by JSK
If the SKREEM needs to read the chip before lock/unlock how does the ring read the signal while you are standing in the driveway?
Read this and hope it answers the question. CLICK

 
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Old Dec 10, 2018 | 03:31 PM
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Default Re: Let's discuss the key fob transponder chip(s)

Thanks 180 - this is much needed by us newby's.

Jim
 
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Old Dec 10, 2018 | 03:44 PM
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Default Re: Let's discuss the key fob transponder chip(s)

Correction:
Thanks 180 for the sourcing.
One additional worry on the last page of the PDF under the first bullet:
  • "Secret Key" is an identification number (electronically stored number) that is unique to each SKREEM, the PCM and all ignition key transponders.
Does this mean that the PCM also is VIN dependent?
If so, then the PCM is just as critical as the SKREEM and key transponders.
Has anyone had a failed PCM? If so, was a replacement effected with a non-dealer/NeedsWings part (eBay, Amazon, etc?)

This is getting curiouser and curiouser...
Cheers,
 

Last edited by Chooch; Dec 10, 2018 at 04:22 PM. Reason: Correction
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Old Dec 10, 2018 | 03:59 PM
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Default Re: Let's discuss the key fob transponder chip(s)

So, I assume the start signal to the SKREEM comes from the RFID chip and the unlock signal comes from the circuit board in the FOB. That would explain why no start cars will still lock and unlock. Is my thinking right?
 
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Old Dec 10, 2018 | 04:54 PM
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Default Re: Let's discuss the key fob transponder chip(s)

Originally Posted by Jim Holian
Thanks 180 - this is much needed by us newby's.

Jim
I just wish I understood what it says.🤔
 
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Old Dec 10, 2018 | 05:24 PM
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Default Re: Let's discuss the key fob transponder chip(s)

Originally Posted by JSK
So, I assume the start signal to the SKREEM comes from the RFID chip and the unlock signal comes from the circuit board in the FOB. That would explain why no start cars will still lock and unlock. Is my thinking right?
Yes, that is a correct assumption.
 
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Old Dec 10, 2018 | 06:03 PM
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Default Re: Let's discuss the key fob transponder chip(s)

Originally Posted by ala_xfire
Yes, that is a correct assumption.
Red Dog purchased a used key for the circuit board I think and it opened his doors, was that because he had inserted the old chip into the case or was he just lucky? Hmm!
 
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Old Dec 10, 2018 | 07:09 PM
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Default Re: Let's discuss the key fob transponder chip(s)

As an importer of electronics from China and Taiwan in my business, I can tell you that "onehundred80 " is absolutey correct. You can't fight this procession. There is no way we can start up businesses in the good old US to compete with these Oriental products. I can say that China is probably where Japan was 30 years ago and now the cheap labor is Viet Nam of all places.
 
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Old Dec 10, 2018 | 07:18 PM
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Default Re: Let's discuss the key fob transponder chip(s)

edmoncwheeler - So, does that mean that China will be making SKREEM modules and remote key's for our Crossfires? If someone made them for a reasonable price, I venture to say that better than 50% of the guy's on this forum would be buying them. Since you indicate that you are an importer of China and Taiwan goods, do you know anything about them copying our SKREEM module's or keys?

Jim
 
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Old Dec 10, 2018 | 07:38 PM
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Default Re: Let's discuss the key fob transponder chip(s)

Originally Posted by onehundred80

Red Dog purchased a used key for the circuit board I think and it opened his doors, was that because he had inserted the old chip into the case or was he just lucky? Hmm!





Actually, I purchased 9 brand new complete Crossfire key fobs. These had all the internals including a transponder chip and a blank uncut key blade. I disassembled the new key fob and the old damaged key fob. Then I put the old (correct) chip , the old circuit board and the old key blade all from my old damaged fob into the brand new key fob case. Everything worked correctly and immediately. I think I could have actually used the new circuit board and would just have needed to "program" the fob to the car. Directions here: https://www.crossfireforum.org/forum...tml#post146279
 

Last edited by RED DOG; Dec 10, 2018 at 07:47 PM.
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Old Dec 10, 2018 | 11:10 PM
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Default Re: Let's discuss the key fob transponder chip(s)

Originally Posted by RED DOG
Actually, I purchased 9 brand new complete Crossfire key fobs. These had all the internals including a transponder chip and a blank uncut key blade. I disassembled the new key fob and the old damaged key fob. Then I put the old (correct) chip , the old circuit board and the old key blade all from my old damaged fob into the brand new key fob case. Everything worked correctly and immediately. I think I could have actually used the new circuit board and would just have needed to "program" the fob to the car. Directions here: https://www.crossfireforum.org/forum...tml#post146279
I did not remember correctly, you just used the new case like many have done.
This is the post I remember CLICK and you did not mention the circuit board so I assumed you used the new board and not your old board.

Why not try to use the circuit board and see what happens.
 

Last edited by onehundred80; Dec 10, 2018 at 11:32 PM.
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Old Dec 11, 2018 | 11:27 AM
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Default Re: Let's discuss the key fob transponder chip(s)

I just contacted my local Chrysler dealer to confirm that they are now charging $800.00 for a new key fob part# 5099684AA.
Mercedes dealers offer the same key fob part# A1937600106 for $200.00!!
I would like to purchase the key fob from Mercedes and take it to my Chrysler dealer who would charge me $150.00 to program the fob to my vehicle.
The Chrysler dealer is telling me they will not guarantee that they can program the Mercedes key fob to my car, despite the fact that it's the same fob.
Question... Has anyone purchased the Mercedes fob and had it programmed to your vehicle?
 
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Old Dec 11, 2018 | 06:25 PM
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Default Re: Let's discuss the key fob transponder chip(s)

Originally Posted by Brian M
I just contacted my local Chrysler dealer to confirm that they are now charging $800.00 for a new key fob part# 5099684AA.
Mercedes dealers offer the same key fob part# A1937600106 for $200.00!!
I would like to purchase the key fob from Mercedes and take it to my Chrysler dealer who would charge me $150.00 to program the fob to my vehicle.
The Chrysler dealer is telling me they will not guarantee that they can program the Mercedes key fob to my car, despite the fact that it's the same fob.
Question... Has anyone purchased the Mercedes fob and had it programmed to your vehicle?
Brian . . . What are you trying to do? Are you trying to order / buy a working second key fob for your Crossfire?
 
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Old Dec 11, 2018 | 07:47 PM
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Default Re: Let's discuss the key fob transponder chip(s)

I'm sure you can program the lock-unlock buttons to your car yourself.
But the RFID chip in the key that starts the car has to be programmed to the VIN by the supplier.

The dealer does not "program the key to the car", they only sync the fob with the SKREEM for hte lock-unlock to work, You can do that yourself in 15 seconds.
 
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