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Fuel Shutoff Valve Circuit
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Overview
| CODE | REASON | EFFECT |
| Fault Code: 254 PID: S017 SPN: 632 FMI: 4/4 LAMP: Red SRT: |
Fuel Shutoff Valve Circuit – Shorted Low. Low voltage detected at fuel shutoff valve circuit. |
Fuel shutoff valve will close. Engine will shutdown. |
 Fuel Shutoff Valve Circuit
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Circuit Description
The fuel shutoff valve is a device used by the electronic control module
(ECM) to control the engine fuel supply. The ECM can shut down the engine by cutting off the power to the fuel shutoff valve.
Component Location
The fuel shutoff valve is located on the fuel delivery housing above the fuel filter. Refer to Procedure 100-002 in Section E for a detailed component location view.
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-to-chassis ground wire to make sure it is securely fastened to a clean, dry, conductive surface.
Possible causes for this fault include:
- Short circuit to ground in the engine harness, connectors, or fuel shutoff valve.
Refer to Troubleshooting Fault Code t05-254
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