Group 28 Engine Control Module (ECM) Diagnostic Trouble Codes (DTCs) ECM SPN 631, Calibration Module – MID 128 PSID 77/PSID 124 ECM SPN 633, Engine Fuel Actuator 1 Control Command – MID 128 SID 18 34 FMI 12 • Bad intelligent device or component • Check sum error • Red engine shutdown lamp illuminated • Engine will not start • Engine Control Module (ECM) FMI 14 • Special instructions • VIN not loaded yet • Red engine shutdown lamp illuminated • Loss of log data and some user configurable data • Engine Control Module (ECM) software Type of fault: FMI Description: Fault Condition: Possible Symptoms: Possible Cause:
FMI 3 • Voltage above normal, or shorted to high source • Check sum error • Engine will not start • Software error FMI 8 • Abnormal frequency or pulse width or period • Reset of ECM does not work • Engine will not start • Software error 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 • Valve constantly shut • Faulty solenoid • Faulty harness • Faulty ECM driver FMI 4 • Voltage below normal, or shorted to low source • Circuit shorted – • Yellow electronic malfunction lamp illuminated • High fuel consumption due to fuel leakage • Faulty solenoid • Faulty harness • Faulty ECM driver FMI 5 • Current below normal or open circuit • Open circuit • Yellow electronic malfunction lamp illuminated • Valve constantly shut • Faulty solenoid • Faulty harness