... tests Electronic Unit Injectors (EUI) & Electronic Unit Pumps(EUP) of most models on the market. ApplicationThe EUS-1001 repair tester is designed ... (EUI) and Electronic Unit Pumps (EUP) on the engines by DDC, CAT, Cummins, Volvo, Mercedes Benz, Iveco, Mack, Scania, VW, LandRover, John Deere ...