forklift

hi guys I need info on hyster yale/Zhejiang forklift technical info it has a 1.6 litre Mitsubishi engine I don't know a lot about these ignition systems as they relate to the dual fuel system gas and lpg we have a forklift tech that comes out but says there is no way to plug in and check out the code that is generating the check engine light I don't know a lot but if there is a check engine light there should be a dlc to plug in some kind of scfan tool I have scowered the internet and the hyster yale website but to no avail theres gotta be somewhere you can get diagrams and stuff for these forklift the forklift tech that is coming out seems to be putting band aids on it like bypassing relay to get starter going I don't think that's a good move one of the things this forklift is doing besides acting like it needs a maf signal it cuts out all the time as you puta load to the engine but the other thing it is doing is intermittingly cutting off right in the middle of driving which I am thinking is a cutout of ignition for some reason I am thinking icm is wore out but I have no knowledge of these systems it doesn't have an ECU it has a thing called a sECM whatever that is I think it stands for small ecm please keep in mind this is a Mitsubishi 1.6 engine anyway its a zheziang A5000 model made by hyster/yale who I guess bought Zhejiang so I guess its a foregn company now they have anice website but very limited technical info or diagrams or a rundown of any systems used like the dual fuel system I am not sure if that could be a factor in ignition or not any help is appreciated thank you and DONT BE A PARTS CHANGER