CM870 and ISX Engines – FAULT CODE 2311

Front Fueling Actuator Circuit


Fault Code: 2311
PID: S18
SPN: 633
FMI: 11/31
LAMP: Amber

Fueling Actuator Number 1 Circuit Error. Error detected on the front fueling actuator circuit.

Cylinders in front bank will not receive fuel. Engine will run rough with low power.

Front Fueling Actuator Circuit

Circuit Description

The fueling actuators are commanded by the ECM to control fuel metering. Each fueling actuator is connected to the ECM by a fueling actuator (+) and fueling actuator (-) wire. An electrical signal is sent to the fueling actuator from the ECM on the (+) wire and is returned to the ECM on the (-) wire. Each actuator is normally closed, and it is only opened by an electrical pulse from the ECM during metering.

Component Location

The front fueling actuator is located on the fuel control housing. It is the first actuator from the front of the engine. The fuel control housing is located on the intake side of the engine below the EGR mixer. Refer to Section E for a detailed component location view.

Shop Talk

Possible causes of this fault are:

  • Open circuit in the engine harness, connectors, or actuator
  • Short circuit to ground in the engine harness or actuator
  • Short circuit to voltage source in the engine harness
  • Low or high resistance in the actuator.

Refer to Troubleshooting Fault Code t05-2311

Last Modified:  01-Sep-2010