Jeep Grand Cherokee Forum : “Jeep starts but shuts off.”

unhook the neg side of battery for about 5 minutes so the computer can reset itself,if this dont do it ,look in fusebox and pull the ECM fuse for same amount of time,replace.this should fix your problem.

Computer must relearn.  Have you scanned the computer for trouble codes?

I know on some Chryslers you just had to lock and unlock the door with the key to disable the security system. You should give that a try.

take ur ignition key to the passenger door turn to lock then unlock and that will reset ur computer

change the alternater