Group 28 Troubleshooting MID 128 PID 105 Intake Manifold Temperature 23 Type of fault: FMI Description: Fault Condition: Possible Symptoms: Possible Cause:
FMI 0 • Data valid but above normal operational range • The Intake Manifold Temperature Sensor is indicating an unphysical value • Engine derate • Malfunction indicator lamp illuminated • Faulty Intake Manifold Temperature Sensor or Engine Management System (EMS) Module connector • Temperature Sensor harness • Malfunction Intake Manifold Temperature Sensor FMI 1 • Data valid but below normal operational range • The Boost Temperature Sensor is indicating an unphysical value • Minor engine derate • Malfunction indicator lamp illuminated • Faulty Intake Manifold Temperature Sensor or Engine Management System (EMS) Module connector • Break in the Intake Manifold Temperature Sensor harness • Malfunction Intake Manifold Temperature Sensor FMI 2 • Data erratic, intermittent or incorrect • The Intake Manifold Temperature Sensor output is too high or too low • Engine derate • Malfunction indicator lamp illuminated • Faulty Intake Manifold Temperature Sensor or Engine Management System (EMS) Module connector • Break in the Intake Manifold Temperature Sensor harness • Malfunction Intake Manifold Temperature Sensor FMI 4 • Voltage below normal or shorted low • N/A • Difficult to start in cold climates • Engine derate • Malfunction indicator lamp illuminated • Short circuit • Intermittent fault in the Intake Manifold Temperature Sensor harness • Faulty Intake Manifold Temperature Sensor connector • Intake Manifold Temperature Sensor failure FMI 5 • Current below normal or open circuit • A short to battery • An open in the 5 volt supply circuit • Difficult to start in cold climates • Engine derate • Malfunction indicator lamp illuminated • A short circuit in the metering circuit • Intermittent fault in the Intake Manifold Temperature Sensor harness • Faulty Intake Manifold Temperature Sensor connector • Intake Manifold Temperature Sensor failure FMI 10 • Abnormal rate of change • The Boost Temperature Senor output is showing a constant value • Engine derate • Malfunction indicator lamp illuminated • Faulty Intake Manifold Temperature Sensor harness • Intake Manifold Temperature Sensor failure