in order for the dual climate to work the vehicle must have the sun sensor on the dash. also there are temp sensors inside the ac/heater houseing that controls the temp. that way it knows to be 70 degrees on passanger and different on the driver. now idk if this can be added. my cherokee has done the same thing on my touch screen and i know for sure i dont have dual conrtol. soon i am going to purchase the sun sensor and find out if its possible... no eta when but when i do it ill let you know.