CM850 Electronic Control System – FAULT CODE 2384 (ISB/QSB Automotive and Industrial Application)

VGT Actuator Driver Circuit – Voltage Below Normal, or Shorted to Low Source


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

VGT actuator driver circuit – voltage below normal, or shorted to low source.

Possible low power. Power removed from the turbocharger actuator motor.

Turbocharger Actuator Motor Circuit

Circuit Description

The electronic control module (ECM) controls the turbocharger actuator motor, which changes the airflow of the turbocharger based on various engine operating conditions. The sliding nozzle in the turbocharger is operated by the turbocharger actuator motor. The actuator is a DC motor that receives voltage from the ECM.

Component Location

The turbocharger actuator motor is part of the turbocharger actuator assembly, which is located on the exhaust side of the engine and is mounted to the bearing housing of the turbocharger. Refer to Procedure 100-002 for a detailed component location view.

Shop Talk

A possible cause of this fault is the turbocharger actuator signal (+
or -) leads can be shorted to ground in the harness, motor, or the ECM.

Do not supply voltage of any kind to the exhaust gas recirculation
(EGR) valve motor. This circuit uses a pulse-width-modulated signal and direct voltage can permanently damage the motor.

Refer to Troubleshooting Fault Code t05-2384

Last Modified:  08-Jul-2010