Viewing Diagnostic Codes View Active Codes Active codes are fault codes that are currently active. Use the Active Codes option to view all currently active codes as well as information regarding each code’s occurence. To view active diagnostic codes: 1 From the Engine Menu screen, select DIAGNOSTIC CODES . The screen displays the Diagnostic Codes menu. DIAGNOSTIC CODES ----Selections---- ACTIVE CODES 2 Press to select Active Codes . The screen indicates that the codes are being retrieved, then displays the codes. For example: 31 MID:128 ENGINE AUXILIARY OUTPUT #4 OPEN CIRCUIT A 1 SID: 52 FMI: 3 —If no codes are detected, the screen indicates, “ No Active Codes ”.
In this instance, press to exit the screen. 3 Press the or key to scroll through the data, as needed. Detroit Diesel Application User’s Manual 17