 |
|
Variable Geometry Turbocharger Actuator Driver Circuit – Voltage Above Normal or Shorted to High Source
|
Overview
| CODE | REASON | EFFECT |
| Fault Code: 2385 PID: S027 SPN: 641 FMI: 3 LAMP: Amber SRT: |
Variable geometry turbocharger actuator driver circuit – 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 Herion and Norgren air control valves are in different locations on the engine. Refer to Procedure 100-002 (Engine Diagrams) in Section E for a detailed component location view.
Shop Talk
The turbocharger control valve command can be monitored with 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
- Loose ground connection through the engine wiring harness to the engine block ground terminal. Engine test experience has proven that a loose nut on the engine block stud which results in a poor ground connection at the engine harness ring terminal will cause intermittent Fault Code 2385.
Refer to Troubleshooting Fault Code t05-2385
;){kind=link}
;){kind=link}