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.

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