Group 28 Troubleshooting MID 128 PID 103 Turbo Speed 22 Type of fault: FMI Description: Fault Condition: Possible Symptoms: Possible Cause:
FMI 0 • Data valid but above normal operational range • Turbocharger speed is at least 25% greater than the target wheel speed for the measured boost • Engine derate • Malfunction indicator lamp illuminated • Miss detection • Faulty Turbo Speed Sensor harness • Faulty Turbo Speed Sensor connector • Turbo Speed Sensor failure FMI 1 • Data valid but below normal operational range • Turbocharger speed is at least 25% less than the target wheel speed for the measured boost • Engine derate • Malfunction indicator lamp illuminated • Miss detection • Faulty Turbo Speed Sensor harness • Faulty Turbo Speed Sensor connector • Turbo Speed Sensor failure FMI 9 • Abnormal update rate (missing sensor signal) • A fault is logged if the Turbo Speed Sensor signal is lost • Engine derate • Malfunction indicator lamp illuminated • Communication fault in the metering line of the Turbo Speed Sensor circuit • Short to ground in the metering line of the Turbo Speed Sensor circuit • An open in the metering line of the Turbo Speed Sensor circuit