ProTech Auto Systems is your trustworthy supplier of all ECM, PCM, and ECU DU9A-12A650-AF, DU9A-12A650-BF, DU9A-12A650-CA & DU9A-12A650-CB Auto Computers. These devices monitor the fuel, air, and electrical aspects of a DU9A-12A650-AF, DU9A-12A650-BF, DU9A-12A650-CA & DU9A-12A650-CB engine to ensure optimal engine performance. When an auto computer becomes impaired, that is where ProTech Auto Systems steps in.