DRS software performs all programming operations for DDEC II III IV V and MBE modules equipped engines. DDEC Reprogramming System DRS Version 6 14. Program for diagnostic computer. Detroit Diesel Diagnostic 6 45. Program for diagnostic computer. Detroit Diesel Diagnostic 7 04. DDRS software performs all diagnostics and programming operations for all 2007 and 2008 model year engines. Detroit Diesel Reprogramming System 7 03.