The following Nissin Flashes include a built-in AF-assist light (AFAL):  i400, i600, i40, i60A, Di700A, MG80.
When a camera body has its own built-in AF-Assist light the camera will not send a signal to a flash to activate the on-flash AF-Assist light.
This means that your flash's AF-assist light WILL activate when used with a camera body that DOES NOT have its own AFAL, and your flash’s AF-assist light WILL NOT activate when used with a camera body that DOES have its own AFAL.