Alright so I have been fighting with this for a while and can’t seem to figure it out. I had to send my TIPM in due to the fuel pump issue and got it fixed then reinstalled. Once I got it reinstalled the next day the security system kicked in and would shut the jeep off. I am using the same key I have for a long time.

I have done all the resets with the batteries and when I do that I can start the jeep just fine for about 2 days then I’ll get the security light with the shut off.

I called the company that did the TIPM and they said it doesn’t have anything to do with it. I don’t know enough about that system but from what I can read I think they are right. My next step was to replace the SKIM module but don’t know for sure it is bad. Just seems weird it lined up with replacing that.

Any feedback would be greatly appreciated since I am just not super familiar with the system.

 

Any fault codes? Did you try replacing the key fob battery?

The TIPM is involved with the Vehicle Theft Alarm, but doesn't look to be involved with the Sentry Key Immobilizer System.

The Chilton manual has a note of interest:

An external Radio-Frequency Identification (RFID) key (and/or pass/radio key), such as one used to gain access to a 24 hour gym, can cause this DTC to set and create a no start condition. Inspect the customer's key chain for any type of RFID key. If one is not found, question the customer to see if a spare key chain has this RFID key on it or if it was removed from the original key chain before the vehicle was released for service. If a RFID key is present, remove the ignition key from the vehicle and remove the RFID key from the key chain. For GPEC equipped vehicles, disconnect the battery and wait a minimum of 5 minutes, reconnect and attempt to start the vehicle. For NGC equipped vehicles, turn the ignition on a minimum for one hour, and then attempt to start the vehicle. If the vehicle does not start, continue with the diagnostic test.

 

Fault codes is the P0513 Invalid Skim Key. It doesn’t have an RFID and there isn’t a battery, I don’t think.

 

That key works like your touch-to-pay credit card. It is an RFID system that works on a type of Near Field Communication (NFC), though Jeep doesn't call it that. The Sentry Key REmote Entry Module (SKREEM) module in the steering wheel excites the key and the key exchanges a code with the SKREEM and, if valid, allows the vehicle to start and/or stay running. It does not have or need a battery. The key itself might be bad. Do you have a second key? Does it do the same thing?

If that's the case, it is probably a bad SCREEM module (AKA Wireless Control Module, or WCM) in the steering column. If it is replaced, it needs to be reprogrammed. It requires a StarSCAN tool, which is likely only your dealer has.

It should be noted that the Chilton manual suggests it could also be caused by the PCM (AKA "ECM").

It would seem that a trip to your dealer might be in order.

An alternative might be to do what was done in this video - an PCM reprogram to eliminate the SKIM (SKREEM, WCM, yada-yada). It's for a Grand Cherokee, but I've seen several posts that it works with the early Jeep JKs too.


Good luck!

 

I think it’s because your Jeep has a few parts that all need to stay in sync the TIPM, the SKIM, and your key. When the TIPM was repaired or reset, it may not fully match what the security system expects anymore. After a couple of days, that mismatch can trigger the security system and shut the Jeep down.