CM850 Electronic Control System – FAULT CODE 2387

Turbocharger Actuator Motor – Mechanical System Not Responding Properly


Fault Code: 2387
PID: S146
SPN: 2975
FMI: 7/7
LAMP: Amber

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 low power. Power will be 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 in Section E for a detailed component location view.

Shop Talk

Possible causes of this fault include:

  • Failed turbocharger position sensor, and mechanical or electrical failure
  • Turbocharger actuator motor assembly failure requiring a high current to operate the turbocharger, such as a stuck or sticking turbocharger.

Refer to Troubleshooting Fault Code t05-2387

Last Modified:  08-Jul-2010