Electronic Control System Signature, ISX and QSX15 Engines – FAULT CODE 254

Fuel Shutoff Valve Solenoid Supply Circuit


Overview

CODE REASON EFFECT
Fault Code: 254
PID: S017
SPN: 632
FMI: 4/4
LAMP: Red
SRT: 

Less than (+) 6 VDC detected at fuel shutoff circuit or an excessive current draw from the electronic control module (ECM) or faulty ECM output circuit.

The ECM turns off the fuel shutoff supply voltage. The engine will shut down.

Fuel Shutoff Valve Solenoid Supply Circuit
SMALL | MEDIUM | LARGE

Circuit Description

The fuel shutoff valve solenoid is a device used by the ECM to control the engine fuel supply. The ECM can shut down the engine by cutting off the power to the fuel shutoff valve solenoid.

Component Location

The fuel shutoff valve solenoid is located on the fuel delivery housing above the fuel filter.

Shop Talk

  • Inspect the fuel shutoff supply circuit for external wires that can be spliced in to power another device. Remove any extra wires that are found in the circuit.
  • If there is an external shutdown system on the vehicle that uses the fuel shutoff valve for engine shutdown, make sure it has not
    failed and pulled down the voltage on the fuel shutoff circuit.
  • Inspect the engine-block-to-chassis ground wire to make sure it is securely fastened to a clean, dry, conductive surface.
  • Check the starter solenoid (+) terminal for a loose connector or accessory wiring with damaged insulation.

Refer to Troubleshooting Fault Code t05-254.

Last Modified:  26-Oct-2010