Originally Posted by billbo
what is SKIS
SKIS stands for something like Security Key Intruder System.
Some KJs only have it as an option, some have it standard.
You will Know if you have it installed if when you turn on the ignition a "KEY" symbol with a line through it light up in amber for a few seconds.
SKIS systems have a coded chip inbedded in the plastic of the key...when the key is inserted into the ignition key slot the chip sends a code to a SKIM module which sits just below the key barrel on the steering shaft...this SKIM module has a wire loop going around the key slot and picks up the code from the chip in the key.
The code is sent to the PCM/ECM and if the PCM/ECM is happy with the code the "key" symbol goes out and you can start the Jeep.
This prevents thieves trying to hot-wire the ignition or use a copied metal key to start the Jeep.
So if you have SKIS installed then you have to have the chipped key in the ignition slot while you turn the ignition switch with a screwdriver or the engine will not start.