CM850 Electronic Control System – FAULT CODE 2385 (ISC/QSC/ISL/QSL Automotive, Industrial, or Marine Application)

VGT Actuator – Voltage Above Normal or Shorted to High Source


Fault Code: 2385
PID: S027
SPN: 641
FMI: 3
LAMP: Amber

VGT Actuator – Voltage Above Normal or Shorted to High Source. Open circuit or high voltage detected at turbocharger control valve circuit.

Variable geometry turbocharger may be in either the open or closed position.

Turbocharger Control Valve Circuit

Circuit Description

The electronic control module (ECM) controls the variable geometry actuator position with the turbocharger control valve. The turbocharger control valve controls the air pressure to the variable geometry actuator when commanded by the ECM. ECM commands are sent to the control valve through the turbocharger control valve signal of the ECM engine harness.

Component Location

The turbocharger control valve is located on the fuel pump side of the engine. It is mounted between the number 5 and number 6 fuel lines on the air intake manifold. Refer to Procedure 100-002 for a detailed component location view.

Shop Talk

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 of this fault code include:

  • Open circuit in the engine harness or connectors
  • Open circuit in the turbocharger control valve
  • Signal circuit short to voltage source in the engine harness.

Refer to Troubleshooting Fault Code t05-2385

Last Modified:  08-Jul-2010