Cummins ISB CM850 (2003-06) Fault Code: 2385 (ISB) PID: SID 27 SPN: 641 FMI: 3 VGT actuator driver circuit – voltage above normal or shorted to high source.
A possible cause of this fault is the turbocharger actuator signal (+ or -) leads can be shorted to a voltage source in the harness or the ECM.
Do not supply voltage of any kind to the EGR valve motor. This circuit uses a pulse-width-modulated signal and direct voltage can permanently damage the motor.
Possible repairs:
1)Replace the engine harness.
2)Replace the ECM.
3The removal and installation of the connector may correct the fault.
Cummins ISB CM850 (2003-06) Fault Code: 2384 (ISC) PID: SID 27 SPN: 641 FMI: 4 VGT Actuator – Voltage Below Normal or Shorted to Low Source. Low voltage detected at turbocharger control valve circuit.
Cummins ISB CM850 (2003-06) Fault Code: 2384 (ISB) PID: SID 27 SPN: 641 FMI: 4 VGT actuator driver circuit – voltage below normal, or shorted to low source.
Cummins ISB CM850 (2003-06) Fault Code: 2383 PID: SID 27 SPN: 641 FMI: 5 Variable Geometry Turbocharger actuator circuit – current below normal, or open circuit.
Cummins ISB CM850 (2003-06) Fault Code: 2382 PID: SPN: 2795 FMI: 4 Turbocharger position sensor circuit – shorted low. Low signal voltage detected at the turbocharger position sensor circuit.
Cummins ISB CM850 (2003-06) Fault Code: 2381 PID: SPN: 2795 FMI: 4 Turbocharger position sensor circuit – shorted high. High signal voltage detected at the turbocharger position sensor circuit.
Cummins ISB CM850 (2003-06) Fault Code: 2377 PID: SID 33 SPN: 647 FMI: 3 Fan Control Circuit – Voltage Above Normal or Shorted to High Source. Open circuit or high voltage detected at the fan control circuit.
