SPN 632 - FMI 7 (Fault Code 259)
Saturday, July 14, 2018
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SPN632 FMI7
Engine Fuel Shutoff Valve stuck open - Mechanical system not responding or out of adjustment
CODES:
Fault Code: 259
PID(P), SID(S): S17
SPN: 632
FMI: 7/7
Lamp: Amber
REASON: The fuel shutoff valve is stuck open.
EFFECT: Engine speed and torque derate.
Circuit Description:
The fuel shutoff valve is a device used by the engine control module (ECM) to control the engine fuel supply. When the ECM energizes the engine fuel shutoff valve driver circuit, the engine fuel shutoff valve is opened. Zero voltage to the engine fuel shutoff valve will close the engine fuel shutoff valve.
Component Location:
The fuel shutoff valve is located on the fuel delivery housing, below the air inlet horn.
Conditions for Running the Diagnostics:
This diagnostic runs continuously when the keyswitch is in the ON position or when the engine is running.
Conditions for Setting the Fault Codes:
The Engine Control Module (ECM) detected that the fuel pressure did not drop after the fuel shutoff valve was commanded off.
Action Taken When the Fault Code is Active:
• The ECM illuminates the amber CHECK ENGINE lamp and/or the malfunction indicator lamp (MIL) immediately when the diagnostic runs and fails.
Conditions for Clearing the Fault Code:
• To validate the repair, perform a key cycle, start the engine and let it idle for 1 minute.
• The fault code status displayed by the recommended Cummins® electronic service tool or equivalent will change to INACTIVE immediately after the diagnostic runs and passes.
• The ECM will turn off the amber CHECK ENGINE lamp immediately after the diagnostic runs and passes.
• The "Reset All Faults" command in the recommended Cummins® electronic service tool or equivalent can be used to clear active and inactive faults.
Shop Talk:
Possible cause of this fault code:
• A malfunctioning, obstructed, or sticking fuel shutoff valve.
Read More:
SPN 639 - FMI 9 (Fault Code 285)
SPN 1043 - FMI 4 (Fault Code 284)
Blog.Teknisi
Engine Fuel Shutoff Valve stuck open - Mechanical system not responding or out of adjustment
 |
| Fuel Shutoff Valve |
CODES:
Fault Code: 259
PID(P), SID(S): S17
SPN: 632
FMI: 7/7
Lamp: Amber
REASON: The fuel shutoff valve is stuck open.
EFFECT: Engine speed and torque derate.
Circuit Description:
The fuel shutoff valve is a device used by the engine control module (ECM) to control the engine fuel supply. When the ECM energizes the engine fuel shutoff valve driver circuit, the engine fuel shutoff valve is opened. Zero voltage to the engine fuel shutoff valve will close the engine fuel shutoff valve.
Component Location:
The fuel shutoff valve is located on the fuel delivery housing, below the air inlet horn.
Conditions for Running the Diagnostics:
This diagnostic runs continuously when the keyswitch is in the ON position or when the engine is running.
Conditions for Setting the Fault Codes:
The Engine Control Module (ECM) detected that the fuel pressure did not drop after the fuel shutoff valve was commanded off.
Action Taken When the Fault Code is Active:
• The ECM illuminates the amber CHECK ENGINE lamp and/or the malfunction indicator lamp (MIL) immediately when the diagnostic runs and fails.
Conditions for Clearing the Fault Code:
• To validate the repair, perform a key cycle, start the engine and let it idle for 1 minute.
• The fault code status displayed by the recommended Cummins® electronic service tool or equivalent will change to INACTIVE immediately after the diagnostic runs and passes.
• The ECM will turn off the amber CHECK ENGINE lamp immediately after the diagnostic runs and passes.
• The "Reset All Faults" command in the recommended Cummins® electronic service tool or equivalent can be used to clear active and inactive faults.
Shop Talk:
Possible cause of this fault code:
• A malfunctioning, obstructed, or sticking fuel shutoff valve.
Read More:
SPN 639 - FMI 9 (Fault Code 285)
SPN 1043 - FMI 4 (Fault Code 284)
Blog.Teknisi
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