CM850 Electronic Control System – FAULT CODE 2384 (ISC/QSC/ISL/QSL Automotive, Industrial, or Marine Application)

VGT Actuator – Voltage Below Normal or Shorted to Low Source


Fault Code: 2384
PID: S027
SPN: 641
FMI: 4
LAMP: Amber

VGT Actuator – Voltage Below Normal or Shorted to Low Source. Low voltage detected at turbocharger control valve circuit.

Variable geometry turbocharger will go to the open 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:

  • Signal short circuit to ground
  • Short circuit to ground in the turbocharger control valve.

Refer to Troubleshooting Fault Code t05-2384

Last Modified:  08-Jul-2010