It was also easy to steal the vehicle, I assume, by forcing the lock or picking it. Per Chrysler, "The SKREEM/Wireless Ignition Node (WIN) is an integral component of the SKIS antitheft device."

 

Yep,, no shocker to me, too much technology in vehicles today. Has anybody try to disconect / re-wire ,, this magic box that controlls this feature? I am from the old school era, if it does not partake in a crtical part of the vehicles everyday operation, disconnect it , especially if it becomes a repeat offender....lol But seriously, I am starting to see many threads on different forums regarding this key sentry system.


My 2 cents.....

 

If the dealer can't reproduce the problem they are gonna deny you on a lemon law claim. If the dealer can't find a problem they can't file a warranty claim. They don't get paid, they aren't going to keep looking. I had some intermittent issues on my 95 YJ, enventually the dealer I bought it from told me to not come back. So be nice to them, they don't have to work on it. Perhaps you should video record it every time you start it so that you can show them you aren't making it up. Also collect every bit of documentation that you can including saving your receipts from car rental. Insist on documentation every time you bring it in. If they can't find anything and don't do anything they may not write it up. Insist on them writing it up.

 

today's vehicles are running on several networks.. or CANs.. disabling modules will get you nowhere.. in the older vehicles modules would close a circuit, set a resistance, turn on a relay, etc.. and those could be disabled or taken out of service... today a module detects a condition and then sends DATA across the CAN to the master (which is either the BCM or PCM.. ultimnatelky the PCM is the master device...).. taking a module out will cause the PCM to simply ignore that module.. and all conditions associated wit hthat module will fail to a '0' or "false" condition if they are boolean.. if that module includes sensors.. those sensors will be considered "OPEN" out-of-range values... if one of those parameters is required for the vehicle to operate and is 'out of range' or 'false' the vehicle will NOT operate....

in the case of the WCM / SKREEM, the module is on the bottom of the steering column... with its antenna circular around the ignition key hole... the key transmits a VERY WEAK RF signal (very weak so that it can last many years).. the key transmits its code every so often (If i remember correctly, every 1/2 second).. they key transmits constantly whether it is in the jeep or not...

when you put the key in and start the jeep.. the PCM allows the engine to start.. they key continues to transmit its code.. the SKREEM is in listen mode for the code.. when it gets a code, it checks it against its programmed database... if correct it sends a passcode to the PCM of 'all-clear' ..this code rolls and is encrypted so not easily duplicated... similar to a garage door opener with rolling codes...

the engine is allowed to run 2 seconds...if after 2 seconds the SKREEM hasnt sent an all-clear to the PCM the PCM shuts down the engine....

the 2 seconds allows the key to transmit its code several times.. which is normally sufficient that it will get accepted on at least one of those tries....

because of the variances in electronic components.. its possible to have keys that may transmit a bit weaker than others.. and a SKREEM that is less sensitive than others.. the wrong combination and you get a condition like the OP had...

-Christopher

 

lucky for the warrenty

 

OK,, makes sense,, since you seem to be really into the know on this subject , I have a question for ya. How does one know when to replace the little button battery in theSntry Key itself, and could this rememdy the problem that the OP has,,,Could be a communication error......????

 

The transponder portion of the key doesn't require a battery. It gets power through induction from the coil around the lock cylinder.

My spare key will allow the Jeep to run, and has no battery in it.

 

correct.. the battery in the key fob is only for the on-demand transmitter for the lock / unlock / panic / remote start buttons.. . and I just replace those when the range starts getting less and less for the unlock....

people who like to play with the key fob buttons while waiting in line for a concert or such will run those batteries down quicker and quicker..

-Christopher

 

Godd stuff, glad they found the issue. As far as the beer, shipping would be a bit of a problem.

 

This issue is fixed. My 2010 JK now starts and keeps running every time.
The dealer replaced the SKREEM module and that fixed it. Apparently, it was not receiving signals from the key(s) in many, but not all, cases.

Yes, I'm glad I have warranty.
And no, I don't think there is too much technology in my Jeep. I think there's not enough technology in it!