Group 28 Engine Control Module (ECM) Diagnostic Trouble Codes (DTCs) ECM SPN 4376, Aftertreatment Diesel Exhaust Fluid (DEF) Return Valve MID 128 PSID 105 ECM SPN 4752, Engine Exhaust Gas Recirculation (EGR) Cooler Efficiency MID 128 SID 282 ECM SPN 4811, Engine Piston Cooling Oil Pressure – MID 128 PPID 8 81 Type of fault: FMI Description: Fault Condition: Possible Symptoms: Possible Cause:
FMI 3 • Voltage above normal, or shorted to high source • Circuit shorted + • MIL illuminated • Not possible to perform afterrun • Faulty harness • Faulty connector • Aftertreatment DEF pump assembly failure FMI 4 • Voltage below normal, or shorted to low source • Circuit shorted – • Open circuit • MIL illuminated • Not possible to perform afterrun • Faulty harness • Faulty connector • Aftertreatment DEF pump assembly failure FMI 5 • Current below normal or open circuit • Open circuit • MIL illuminated • Not possible to perform afterrun • Faulty harness • Faulty connector • Aftertreatment DEF pump assembly failure FMI 7 • Mechanical system not responding or out of adjustment • Possible mechanical problem with aftertreatment diesel exhaust ful id (DEF) return valve • MIL illuminated • Not possible to perform afterrun • Mechanical fault – DEF return line restricted between DEF pump and DEF tank • Aftertreatment Diesel Exhaust Fluid (DEF) pump assembly Type of fault:
FMI Description: Fault Condition: Possible Symptoms: Possible Cause: FMI 7 • Mechanical system not responding or out of adjustment • Low EGR cooler effci iency • MIL illuminated • EGR cooler clogged or damaged Type of fault: FMI Description: Fault Condition: Possible Symptoms: Possible Cause: FMI 1 • Data valid but below normal operational range - Most severe level • Pressure below range • Red engine shutdown lamp illuminated • N/A