Group 28 Troubleshooting MID 128 PID 91 Accelerator Pedal Position MID 128 PID 94 Fuel Delivery Pressure 18 Type of fault: FMI Description: Fault Condition: Possible Symptoms: Possible Cause: FMI 9 • Abnormal update rate • Missing signal from VECU • N/A • J1708 pedal information not available Type of fault: FMI Description: Fault Condition: Possible Symptoms: Possible Cause:
FMI 1 • Pressure critically low • EMS module detects a low fuel pressure reading • Rough idle • Uneven running • Engine derate • A clogged fuel filter • Fuel leaking from a fuel line or fitting • Poor fuel pump pressure • Low fuel level FMI 3 • Voltage high/open • Low Fuel Pressure (FP) Sensor signal line voltage • Engine derate • Malfunction indicator lamp illuminated • Damaged contacts in harness • Faulty Fuel Pressure (FP) sensor • Open circuit.
FMI 5 • Current low/open • Low Fuel Pressure (FP) Sensor signal line voltage • Engine derate • Malfunction indicator lamp illuminated • Damaged contacts in harness • Faulty Fuel Pressure (FP) sensor FMI 7 • Current low/open • Drop in fuel pressure • Engine derate • Malfunction indicator lamp illuminated • Clogged fuel filter • Leaking fuel line or fitting • Poor fuel pump response