Group 28 Engine Control Module (ECM) Diagnostic Trouble Codes (DTCs) ECM SPN 651, Engine Injector Cylinder 1 – MID 128 SID 1 39 FMI 4 • Voltage below normal, or shorted to low source • Short to ground in the cooling fan control circuit • Output voltage is 1/3 the supply voltage • Yellow electronic malfunction lamp illuminated • Fan always deactivated or always activated if fault is intermittent • Faulty cooling fan actuator • Faulty cooling fan actuator harness or connector FMI 5 • Current below normal or open circuit • Open in the cooling fan control circuit • Increased fuel consumption • Fan runs at full speed • Faulty cooling fan actuator • Faulty cooling fan actuator harness or connector Type of fault:
FMI Description: Fault Condition: Possible Symptoms: Possible Cause:
FMI 3 • Voltage above normal, or shorted to high source • Harness shorted + low side circuit • MIL illuminated • Yellow electronic malfunction lamp illuminated • Engine power loss • Engine running uneven (misfire) • Faulty harness FMI 5 • Current below normal or open circuit • Harness shorted +, – or open high side circuit • Harness shorted – low side circuit • MIL illuminated • Yellow electronic malfunction lamp illuminated • Engine power loss • Engine running uneven (misfire) • Faulty harness • Faulty engine fuel injector FMI 7 • Mechanical system not responding properly • Cylinder balancing data above limit • MIL illuminated • PTO engaged without ECM knowing • Faulty engine fuel injector • Low cylinder compression • Damaged or flywheel FMI 8 • Abnormal frequency, pulse width, or period • Misfire detected • MIL illuminated • Rough engine idle • Faulty engine fuel injector (possibly clogged) FMI 13 • Out of calibration • Cylinder balancing data above limit • MIL illuminated • PTO engaged without ECM knowing • Faulty engine fuel injector • Low cylinder compression • Damaged or flywheel FMI 31 • Condition exists • Misfire detected • MIL illuminated • Rough engine idle • Faulty engine fuel injector (possibly clogged)