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Variable Geometry Turbocharger Actuator Driver Circuit – Voltage Below Normal or Shorted to Low Source
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Overview
| CODE | REASON | EFFECT |
| Fault Code: 2384 PID: S027 SPN: 641 FMI: 4 LAMP: Amber SRT: |
Variable geometry turbocharger actuator driver circuit – 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
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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
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:
- Signal short circuit to ground
- Short circuit to ground in the turbocharger control valve.
Refer to Troubleshooting Fault Code t05-2384
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