Cummins ISX15 User Manual

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Last Modified: 17-Jan-2021

File: 656-t06-1963 Page 1 of 9

ISX15 CM2250

Fault Code: 1963 | SPN: 3482 | FMI: 7

Aftertreatment Fuel Shutoff Valve - Mechanical System Not

Responding or Out of Adjustment

1 Check for primary fault codes

2 Low pressure fuel system component is malfunctioning

2.1 Air in fuel check

2.2 Fuel Inlet Restriction check

2.3 Fuel lift pump check

2.4 OEM fuel system component check

3 Aftertreatment fuel shutoff manifold is malfunctioning

4 Fuel filter restriction

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Last Modified: 17-Jan-2021

File: 656-t06-1963 Page 2 of 9

1 Check for primary fault codes

Solution: S00000174

Verification

Conditions

• Turn keyswitch ON.

• Connect the recommended Cummins® electronic service tool or equivalent.

Action

• Use the recommended Cummins® electronic service tool or equivalent to read the fault codes.

Specification

Before troubleshooting this fault code, troubleshoot any fault code that is active or has more than one inactive count within the last 25 engine operating hours from the following list:

• Aftertreatment fuel: 1923, 1924, 1925, 1926, 1927, 1928

• Fuel: 559, 2372

Linked Solutions

• None

Repair

• Perform a search on the appropriate fault codes.

Validation

• None

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Last Modified: 17-Jan-2021

File: 656-t06-1963 Page 3 of 9

2 Low pressure fuel system component is malfunctioning

Solution: S00000640

Verification

Conditions

• Turn keyswitch ON.

Action

• Verify the fuel system is primed. Refer to Procedure 005-234

• Measure the fuel pump gear pump outlet pressure at idle and at high idle. Refer to Procedure 005-236

• If engine will not start, then perform the check during cranking.

Specification

• If the fuel pump gear pump outlet pressure is not within specification, then proceed to Linked Solutions section.

Linked Solutions

• Air in fuel check (2.1 [S00001205])

• Fuel Inlet Restriction check (2.2 [S00001206])

• Fuel lift pump check (2.3 [S00001207])

• OEM fuel system component check (2.4 [S00000756])

• If the above checks are all within specification, then a malfunctioning fuel gear pump has been detected

Repair

• Replace the fuel pump gear pump. Refer to Procedure 005-025

Validation

• Connect all components

• Connect the recommended Cummins® electronic service tool or equivalent.

• Disable the fault code.

• Operate the engine within the "Conditions for Clearing the Fault Code" found in the Overview section of the troubleshooting procedure.

• Verify that the fault code is no longer active.

• Check ECM Calibration Revision History

• Use the recommended Cummins® electronic service tool or equivalent to find the current ECM code and revision number in the ECM.

• Compare the ECM code and revision number in the ECM to the calibration revisions listed in the ECM Calibration Revision History Database for applicable changes related to this fault code.

• Refer to ECM Calibration Revision History Database.

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Last Modified: 17-Jan-2021

File: 656-t06-1963 Page 4 of 9

2.1 Air in fuel check

Solution: S00001205

Verification

Conditions

• Turn keyswitch ON.

• Verify adequate fuel level in the tank

Action

• Allow the engine to reach operating temperature.

• If engine will not start, then perform the check during cranking.

• Inspect for air being ingested into the fuel. Refer to Procedure 006-003

Specification

• If air is present in the fuel flow, then a damaged fuel supply line, loose or damaged fuel filter, or a loose connection has been detected.

Linked Solutions

• None

Repair

• Tighten the loose fitting or replace the damaged component that allows air to enter the fuel system. Refer to Procedure 006-003

Validation

• Connect all components

• Connect the recommended Cummins® electronic service tool or equivalent.

• Disable the fault code.

• Operate the engine within the "Conditions for Clearing the Fault Code" found in the Overview section of the troubleshooting procedure.

• Verify that the fault code is no longer active.

• Check ECM Calibration Revision History

• Use the recommended Cummins® electronic service tool or equivalent to find the current ECM code and revision number in the ECM.

• Compare the ECM code and revision number in the ECM to the calibration revisions listed in the ECM Calibration Revision History Database for applicable changes related to this fault code.

• Refer to ECM Calibration Revision History Database.

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Last Modified: 17-Jan-2021

File: 656-t06-1963 Page 5 of 9

2.2 Fuel Inlet Restriction check

Solution: S00001206

Verification

Conditions

• Turn keyswitch OFF.

Action

• Measure the fuel inlet restriction. Refer to Procedure 006-020

Specification

If the inlet restriction is excessive, look for the root cause: Inspect the following components if applicable:

• Suction side fuel filters plugged.

• Fuel heater restricted.

Refer to OEM Service Manual

• OEM fuel lines restricted.

Refer to OEM Service Manual

• ECM cooling plate plugged. Refer to Procedure 006-006

• ECM cooling plate check valve restricted. Refer to Procedure 006-006

• OEM fuel lines restricted.

Refer to OEM Service Manual

• Fuel tank stand pipes restricted.

Refer to OEM Service Manual

Linked Solutions

• None

Repair

Repair or replace only the components that were found to be out of specification.

• Replace fuel filter.

Refer to OEM Service Manual

• Repair or replace the fuel heater.

Refer to OEM Service Manual

• Repair or replace the OEM fuel lines.

Refer to OEM Service Manual

• Repair or replace the ECM cooling plate. Refer to Procedure 006-006

• Repair or replace the ECM cooling plate check valve. Refer to Procedure 006-006

• Repair or replace the fuel tank stand pipe.

Validation

• Check ECM Calibration Revision History

• Use the recommended Cummins® electronic service tool or equivalent to find the current ECM code and revision number in the ECM.

• Compare the ECM code and revision number in the ECM to the calibration revisions listed in the ECM Calibration Revision History Database for applicable changes related to this fault code.

• Refer to ECM Calibration Revision History Database.

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Last Modified: 17-Jan-2021

File: 656-t06-1963 Page 6 of 9

2.3 Fuel lift pump check

Solution: S00001207

Verification

Conditions

• Turn keyswitch ON.

Action

• Listen for fuel lift pump operation.

• If the fuel lift pump does not operate after turning the keyswitch ON, then measure the resistance in the fuel lift pump circuit. Refer to Procedure 019-397

• Measure the lift pump pressure. Refer to Procedure 005-236

Specification

• If the resistance is not within specification, then proceed to the Repair section.

• If the fuel lift pump pressure is not within specification, then a malfunctioning fuel lift pump has been detected. Refer to Procedure 005-236

Linked Solutions

• None

Repair

Repair or replace only the components that were found to be out of specification.

• Replace the fuse. Refer to Procedure 019-198

• Repair or replace the engine wiring harness. Refer to Procedure 019-043

• Repair or replace the OEM wiring harness. Refer to Procedure 019-071

• Replace the electric fuel lift pump. Refer to Procedure 005-045

Validation

• Connect all components

• Connect the recommended Cummins® electronic service tool or equivalent.

• Disable the fault code.

• Operate the engine within the "Conditions for Clearing the Fault Code" found in the Overview section of the troubleshooting procedure.

• Verify that the fault code is no longer active.

• Check ECM Calibration Revision History

• Use the recommended Cummins® electronic service tool or equivalent to find the current ECM code and revision number in the ECM.

• Compare the ECM code and revision number in the ECM to the calibration revisions listed in the ECM Calibration Revision History Database for applicable changes related to this fault code.

• Refer to ECM Calibration Revision History Database.

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Last Modified: 17-Jan-2021

File: 656-t06-1963 Page 7 of 9

2.4 OEM fuel system component check

Solution: S00000756

Verification

Conditions

• Turn keyswitch OFF.

Action

• Visually check fuel tank for adequate fuel supply. Refer to Procedure 006-024

• Visually inspect the engine fuel supply lines for signs of kinks, damage or fuel leaks. Refer to Procedure 006-024

• Visually inspect all fuel system gasket locations for signs of leakage. Refer to Procedure 006-024

Specification

• If there is any damage or leaks found in the OEM fuel system, then proceed to the Repair section.

Linked Solutions

• None

Repair

• Repair or replace the malfunctioning OEM component.

Refer to OEM Service Manual

Validation

• None

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Last Modified: 17-Jan-2021

File: 656-t06-1963 Page 8 of 9

3 Aftertreatment fuel shutoff manifold is malfunctioning

Solution: S00003042

Verification

Conditions

• Turn keyswitch ON.

• Connect the recommended Cummins® electronic service tool or equivalent.

• Disconnect the aftertreatment fuel supply line from the aftertreatment fuel injector. Refer to Procedure 011-042

• Connect the fuel extension line.

Action

• Run the engine at idle.

• Use the recommended Cummins® electronic service tool or equivalent.

• Perform the Aftertreatment Fuel Injector Leak Test. Refer to Procedure 011-054

Specification

• If fuel does not flow continuously from the line during the 60 second aftertreatment fuel injector flow test, then a malfunctioning aftertreatment fuel shutoff valve has been detected.

Linked Solutions

• None

Repair

• Replace aftertreatment fuel shutoff valve. Refer to Procedure 011-052

Validation

• Connect all components

• Connect the recommended Cummins® electronic service tool or equivalent.

• Disable the fault code.

• Operate the engine within the "Conditions for Clearing the Fault Code" found in the Overview section of the troubleshooting procedure.

• Verify that the fault code is no longer active.

• Check ECM Calibration Revision History

• Use the recommended Cummins® electronic service tool or equivalent to find the current ECM code and revision number in the ECM.

• Compare the ECM code and revision number in the ECM to the calibration revisions listed in the ECM Calibration Revision History Database for applicable changes related to this fault code.

• Refer to ECM Calibration Revision History Database.

Printed from QuickServe® Online.

Last Modified: 17-Jan-2021

File: 656-t06-1963 Page 9 of 9

4 Fuel filter restriction

Solution: S00000900

Verification

Conditions

• Turn keyswitch ON.

• Engine running.

Action

• Perform the Fuel Filter Restriction Test. Refer to Procedure 005-236

Specification

• If the outlet pressure of the filter is within specification, then proceed to the next solution.

• If pressure from the fuel pump gear pump is within specification and the differential pressure does not meet specification a plugged or blocked fuel filter has been detected.

• If the pressure is not within specification at the fuel pressure filter inlet then a malfunction of the fuel pump gear pump has been detected.

Linked Solutions

• None

Repair

Repair or replace only the components that were found to be out of specification.

• Replace fuel filter. Refer to Procedure 006-065

• Replace the fuel pump gear pump. Refer to Procedure 005-025

Validation

• Connect all components

• Connect the recommended Cummins® electronic service tool or equivalent.

• Disable the fault code.

• Operate the engine within the "Conditions for Clearing the Fault Code" found in the Overview section of the troubleshooting procedure.

• Verify that the fault code is no longer active.

• Check ECM Calibration Revision History

• Use the recommended Cummins® electronic service tool or equivalent to find the current ECM code and revision number in the ECM.

• Compare the ECM code and revision number in the ECM to the calibration revisions listed in the ECM Calibration Revision History Database for applicable changes related to this fault code.

• Refer to ECM Calibration Revision History Database.

If all steps have been completed and no root cause has been identified, then follow the technical escalation process.

Cummins ISX15 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual