Cummins ISB CM850 (2003-06) Fault Code: 2385 (ISC) PID: SID 27 SPN: 641 FMI: 3 VGT Actuator – Voltage Above Normal or Shorted to High Source. Open circuit or high voltage detected at turbocharger control valve circuit. Turbocharger control valve command can be monitored with the INSITE? electronic service tool. This parameter represents the ECM command to the turbocharger control valve, which in turn controls the variable geometry actuator position. Possible causes: 1)Open circuit in the engine harness or connectors2)Open circuit in the turbocharger control valve3)Signal circuit short to voltage source in the engine harness. Possible repairs: 1)Replace the turbocharger...

Cummins ISB CM850 (2003-06) Fault Code: 2386 PID: SPN: 2975 FMI: 6 Turbocharger actuator motor circuit – current is above normal. Excessive current detected at the turbocharger actuator motor circuit. The ECM monitors the current draw of this circuit. If the ECM detects excessive current for a calibrated period of time, it records this fault. Possible causes: 1)Turbocharger actuator motor signal (+ or -) leads shorted together in the engine harness, turbocharger actuator motor, or ECM2)Low turbocharger actuator motor internal resistance. Possible repairs: 1)Replace the turbocharger actuator assembly.2)Repair or replace the engine harness.3)Replace the turbocharger actuator motor assembly.4)Replace the turbocharger....

Cummins ISB CM850 (2003-06) Fault Code: 2387 PID: SID 146 SPN: 2975 FMI: 7 Turbocharger actuator motor – the mechanical system is not responding properly or is out of adjustment. Turbocharger actuator is not responding or is slow to respond. Possible causes: 1)Malfunctioned turbocharger position sensor, and mechanical or electrical malfuction.2)Turbocharger actuator motor assembly malfunction, requiring a high current to operate the turbocharger, such as a stuck or sticking turbocharger. Inspect the turbocharger vanes for residue, and clean the vanes, if required. Find the source of the residue and repair. Possible repairs: 1)Repair or replace the engine harness.2)Replace the ECM.3)Repair...

Cummins ISB CM850 (2003-06) Fault Code: 2388 PID: SID 269 SPN: 2795 FMI: 13 Variable Geometry Turbocharger actuator position failed automatic calibration procedure – out of calibration. Possible cause: 1)A turbocharger internal failure causing the turbocharger actuator to not close fully. When troubleshooting inactive counts of this fault code, running the Turbocharger Actuator Test in INSITE? electronic service tool could help to identify a stuck turbocharger actuator. Possible repairs: 1)Repair or replace the engine harness.2)Replace the ECM.3)Repair or replace the turbocharger. Cummins ISB CM850 (2003-06) Fault Code: 2387 PID: SID 146 SPN: 2975 FMI: 7 Turbocharger actuator motor – the...

Cummins ISB CM850 (2003-06) Fault Code: 241 PID: 84 SPN: 84 FMI: 2 Vehicle Speed Sensor Circuit – Data Erratic, Intermittent or Incorrect. The ECM lost the vehicle speed signal. There are multiple types of vehicle speed sensors. Various types include magnetic pickup, data link, digital, and tachograph. Refer to your OEM for the specific type installed on the vehicle. This fault is set active when the ECM loses a vehicle speed signal when other engine conditions indicate the vehicle is moving. The fault can also become active if there is a series of clutch, service brake or throttle movements...