Group 28 Engine Control Module (ECM) Diagnostic Trouble Codes (DTCs) ECM SPN 642, Engine Variable Geometry Turbocharger (VGT) Actuator 2 MID 128 PPID 89 ECM SPN 647, Engine Fan Clutch Output Device Driver – MID 128 SID 33 38 FMI 7 • Mechanical system not responding or out of adjustment • Mechanical problem with the Engine Variable Geometry Turbocharger (VGT) actuator • MIL illuminated • Yellow electronic malfunction lamp illuminated • Low boost and smoke • Possible engine derate • Power loss in some cases when actuator motor has been disabled • VGT actuator motor effort is temporarily limited to prevent overheating • Restrictions detected when running learn sequence • VGT actuator is slow to follow commands • VGT actuator position is not tracking command FMI 9 • Abnormal update rate • Data from the Engine Variable Geometry Turbocharger (VGT) actuator has been missing for 2-seconds • MIL illuminated • Yellow electronic malfunction lamp illuminated • Engine derated (major) • EGR valve closed • Data link harness • No supply to VGT actuator • VGT actuator • VGT actuator connector FMI 13 • Out of calibration • Failed self- calibration • Yellow electronic malfunction lamp illuminated • VGT actuator Type of fault FMI Description:
Fault Condition: Possible Symptoms: Possible Cause FMI 0 • Data valid but above normal operational range - Most severe level • VGT SRA temperature is critically high • Red engine shutdown lamp illuminated • Engine derate • Coolant system malfunction • Extreme driving conditions • Overheated VGT actuator FMI 16 • Data valid but above normal operating range - Moderately severe level • VGT SRA temperature is moderately too high • Yellow electronic malfunction lamp illuminated • Engine derate • Coolant system malfunction • Extreme driving conditions • Overheated VGT actuator Type of fault: FMI Description: Fault Condition: Possible Symptoms: Possible Cause:
FMI 3 • Voltage above normal, or shorted to high source • Short to positive in the cooling fan control circuit • Yellow electronic malfunction lamp illuminated • Increased fuel consumption • Fan runs at full speed • Faulty cooling fan actuator • Faulty cooling fan actuator harness or connector