I found a post here where you state that the response is "UNABLE TO CONNECT". You have to realize when you are looking for help on something like this you have to be extremely clear, certain responses have specific meanings.
What this means is the ELM chip has cycled through all the protocols and was unable to find an ELM327 supported protocol. They suggest you make sure your ignition key is on as well (obviously this can not be your problem). I am confident at this point your vehicle will not work with this chip, but you will need to contact ELM Electronics for exact reasons why.
I know very little about this vehicle, is it a diesel? Perhaps this is a J1939 supported vehicle? Someone else might have more insight on this.