Edward, not being familiar with your truck model, seems to be my standard opening these days, I am familiar with Israel units on MP20X models and you could personalise the speed modes for the operators on these trucks, if your truck has a steer tiller arm with lift and lower buttons on the left hand side of the throttle, hold them both down and turn on the key switch hold them down 5 seconds and this will get you into the menu display on the DDI working those buttons then should allow you to set the truck mode to slow soft std or hard, later Isckra units could store up to ten fault codes all access through the ddi gauge plus a lot of other test pages you can access with out needing any additional access equipment or Yale technician, when you have set the mode you want pull the tiller down till it stops then return to up right position switch of truck wait thirty seconds switch on and mode should be displayed. I can't tell you how this unit relates to fortis trucks, if I'm way of the beam with this info Edward please excuse me like I say I'm not familiar with your truck model but with the Iskra unit yes.

Regards Titus