Cummins ISB CM850 (2003-06) Fault Code: 692 PID: SPN: 1172 FMI: 4 Turbocharger Number 1 Compressor Inlet Temperature Sensor Circuit – Voltage Below Normal or Shorted to Low Source. Low signal voltage detected at the turbocharger compressor inlet air temperature sensor circuit.
Cummins ISB CM850 (2003-06) Fault Code: 692 PID: SPN: 1172 FMI: 4 Turbocharger Number 1 Compressor Inlet Temperature Sensor Circuit – Voltage Below Normal or Shorted to Low Source. Low signal voltage detected at the turbocharger compressor inlet air temperature sensor circuit.
An extension harness between the main engine harness and the turbocharger compressor inlet temperature sensor may be used depending on the turbocharger arrangement.
Possible causes:
1)Signal circuit shorted to ground in the harness
2)Signal circuit shorted to return or ground in the sensor
3)Failed sensor.
Possible repairs:
1)Replace the turbocharger compressor inlet air temperature sensor.
2)The removal and installation of the connector may correct the fault.
3)Repair or replace the engine harness.
4)Replace the ECM.
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