For CAT Loader: 246C, 256C, 262C, 262C2, 272C, 272D, 272D XHP, 277C, 277C2, 279C, 279C2, 287C, 287C2, 289C, 289C2, 297C, 299C, 299D, 299D XHP. For CAT Engine: 3044C, C3.4, C3.8. Communication is the best way to solve the problem.