Cummins ISX12 CM2250 (2010-12) Fault Code: 1963 PID: SID 332 SPN: 3482 FMI: 7 Aftertreatment Fuel Shutoff Valve 1- Mechanical System Not Responding Properly or Out of Adjustment - dtctruck (2024)

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Description

Circuit Description
This fault code checks for system errors in the aftertreatment fuel injection system. This diagnostic can detect malfunctions of the aftertreatment fuel injector, aftertreatment fuel shutoff valve, and aftertreatment purge air actuator.

Before active regeneration of the aftertreatment diesel particulate filter, a diagnostic test on the system is performed. The aftertreatment fuel injector opens and relieves fuel pressure in the line. The aftertreatment fuel pressure sensor must be reading atmospheric pressure at this point in the test. The aftertreatment fuel injector closes and the aftertreatment purge air actuator opens. This pressurizes the aftertreatment fuel system to vehicle air pressure. The diagnostic checks to make sure the aftertreatment fuel pressure sensor is reading vehicle air pressure. The aftertreatment fuel shutoff valve opens and allows pressurized fuel to enter the system. The aftertreatment fuel injector then opens and primes the system by purging the air from the line. The aftertreatment fuel shutoff valve and aftertreatment fuel injector then close and trap the fuel between the aftertreatment fuel shutoff valve and the aftertreatment fuel injector. The diagnostic checks to make sure the system maintains fuel pressure.

Component Location
The aftertreatment fuel shutoff valve is located in the aftertreatment shutoff valve assembly.

Conditions for Running the Diagnostics
This diagnostic runs during active regeneration of the aftertreatment diesel particulate filter.

Conditions for Setting the Fault Codes
The ECM detects that the aftertreatment fuel pressure sensor is reading a value lower than a threshold when the aftertreatment fuel shutoff valve is commanded open.

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.
Active regeneration of the aftertreatment diesel particulate filter will be disabled unitl the next key cycle.
Engine torque will be reduced if the engine is operated for an extended period of time with this fault active.
Conditions for Clearing the Fault Code
To validate the repair, perform INSITE? electronic service tool Aftertreatment Diesel Particulate Filter Regeneration Test. Once the temperatures in the aftertreatment are warm enough to inject diesel fuel into the exhaust, the diagnostic will run.
The fault code status displayed by INSITE? electronic service tool will change to INACTIVE immediately after the diagnostic runs and passes.
The ECM will turn off the amber CHECK ENGINE lamp after the diagnostic runs and passes.
For OBD engines, the ECM will turn off the MIL after three consecutive trips where the diagnostic runs and passes.
The ?Reset All Faults? command in INSITE? electronic service tool can be used to clear active and inactive faults, as well as extinguish the MIL for OBD applications.

Shop Talk
Possible causes of this fault code include:

Stuck closed aftertreatment fuel shutoff valve
A missing or leaking fuel supply line to the aftertreatment fuel shutoff manifold
A plugged fuel filter
A malfunctioning fuel pump gear pump.

Possible Cause:
1) Aftertreatment Fuel Shutoff Valve failure
2) ECM calibration

Related

Tags: 1-, 1963, 2010-12, 332, 3482, 7, Adjustment, Aftertreatment, CM2250, Code, Cummins, Fault, FMI, Fuel, ISX12, Mechanical, Not, of, or, Out, PID, Properly, Responding, Shutoff, SID, SPN, System, Valve

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Categories Cumminz, DTC TRUCKS, ISX12 CM2250 (2010-12)Tags 1-, 1963, 2010-12, 332, 3482, 7, Adjustment, Aftertreatment, CM2250, Code, Cummins, Fault, FMI, Fuel, ISX12, Mechanical, Not, of, or, Out, PID, Properly, Responding, Shutoff, SID, SPN, System, Valve

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Cummins ISX12 CM2250 (2010-12) Fault Code: 1963 PID: SID 332 SPN: 3482 FMI: 7 Aftertreatment Fuel Shutoff Valve 1- Mechanical System Not Responding Properly or Out of Adjustment - dtctruck (2024)

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