Group 28 Engine Control Module (ECM) Diagnostic Trouble Codes (DTCs) ECM SPN 1231, SAE J1939 Data Link 2 – MID 128 PSID 229/232 ECM SPN 1265, Engine Piston Cooling Oil Pressure Actuator MID 128 SID 85 49 Type of fault: FMI Description: Fault Condition: Possible Symptoms: Possible Cause:
FMI 2 • Data erratic, intermittent or incorrect • Circuit shorted + • Circuit shorted – • Open circuit • MIL illuminated • Engine power loss • No Aftertreatment Diesel Exhaust Fluid (DEF) dosing • No variable geometry engine turbocharger control • Faulty harness FMI 9 • Abnormal update rate • Missing signal from Transmission Control Module (TCM) • MIL illuminated • Yellow electronic malfunction lamp illuminated • No Aftertreatment Diesel Exhaust Fluid (DEF) dosing • SAE J1939 data link • Faulty harness or connectors • DEF pump • Aftertreatment Diesel Exhaust Fluid (DEF) control module Type of fault: FMI Description: Fault Condition: Possible Symptoms: Possible Cause:
FMI 3 • Voltage above normal, or shorted to high source • Circuit shorted + • Yellow electronic malfunction lamp illuminated • Possible smoke during start up • Faulty harness • Faulty actuator FMI 4 • Voltage below normal, or shorted to low source • Circuit shorted – • Red engine shutdown lamp illuminated • Engine damage can occur without piston cooling • Faulty harness • Faulty actuator FMI 5 • Current below normal or open circuit • Open circuit • Yellow electronic malfunction lamp illuminated • Possible smoke during start up • Faulty harness • Faulty actuator