Fault Code: 2448 - SPN: 111 - FMI: 17: L9 CM2350 L116B
Fault Code: 2448 - SPN: 111 - FMI: 17: L9 CM2350 L116B
Fault Code: 2448 - SPN: 111 - FMI: 17: L9 CM2350 L116B
L9 CM2350 L116B
© 2008 Cummins Inc., Box 3005, Columbus, IN 47202-3005 U.S.A. Printed from QuickServe® Online.
All Rights Reserved. Last Modified: 07-Feb-2021
File: 460-t06-2448 Page 2 of 8
Verification
Conditions
• Turn keyswitch OFF.
Action
• Visually inspect that the correct coolant level sensor is installed.
Refer to OEM Service Manual
• Visually inspect the coolant level sensor for damage.
Refer to OEM Service Manual
Specification
• If coolant level sensor is damaged or malfunctioning, proceed to Repair section.
Linked Solutions
• None
Repair
• Replace engine coolant level sensor. Refer to Procedure 019-017
Refer to OEM Service Manual
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• Verify that the fault code is no longer active.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.
© 2008 Cummins Inc., Box 3005, Columbus, IN 47202-3005 U.S.A. Printed from QuickServe® Online.
All Rights Reserved. Last Modified: 07-Feb-2021
File: 460-t06-2448 Page 3 of 8
Verification
Conditions
• Turn keyswitch OFF.
Action
• Perform the Coolant System Pressure Test. Refer to Procedure 008-020
• Visually inspect the engine and engine components for seal, gasket or draincock leaks.
• Visually inspect the radiator, heat exchanger, cab heater, hoses and connections for leaks.
• Pressurize the surge tank with the radiator pressure cap installed to test the functionality of the radiator pressure
cap. Refer to Procedure 008-047
Refer to OEM Service Manual
Specification
• If any of the components have leaks observed, then a leaking cooling system component has been detected.
Linked Solutions
• None
Repair
Repair or replace only the components that were found to be out of specification.
• Repair or replace the leaking components. Refer to Procedure 008-020
Refer to OEM Service Manual
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.
© 2008 Cummins Inc., Box 3005, Columbus, IN 47202-3005 U.S.A. Printed from QuickServe® Online.
All Rights Reserved. Last Modified: 07-Feb-2021
File: 460-t06-2448 Page 4 of 8
Verification
Conditions
• Turn keyswitch OFF.
• Disconnect the engine coolant level sensor from the OEM wiring harness.
• Disconnect the OEM wiring harness connector from the ECM.
Action
• Inspect the pins and connectors for damage. Refer to Procedure 019-361
• Measure the resistance between the coolant level sensor SIGNAL pin at the coolant level sensor OEM wiring
harness connector and the coolant level sensor SIGNAL pin at the OEM wiring harness ECM connector.
• Refer to the circuit diagram or wiring diagram for connector pin identification.
Specification
• A malfunctioning OEM wiring harness has been detected if the resistance is greater than the following
specification: 10 Ω
Linked Solutions
• None
Repair
• Repair or replace the OEM wiring harness. Refer to Procedure 019-071
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.
© 2008 Cummins Inc., Box 3005, Columbus, IN 47202-3005 U.S.A. Printed from QuickServe® Online.
All Rights Reserved. Last Modified: 07-Feb-2021
File: 460-t06-2448 Page 5 of 8
Verification
Conditions
• Turn keyswitch OFF.
• Disconnect the engine coolant level sensor from the OEM wiring harness.
• Disconnect the OEM wiring harness connector from the ECM.
Action
• Inspect the pins and connectors for damage. Refer to Procedure 019-361
• Measure the resistance between the coolant level sensor SIGNAL pin at the OEM wiring harness ECM connector
and ground.
• Refer to the circuit diagram or wiring diagram for connector pin identification.
Specification
• A malfunctioning OEM wiring harness has been detected if the resistance is less than the following specification:
100k Ω
Linked Solutions
• None
Repair
• Repair or replace the OEM wiring harness. Refer to Procedure 019-071
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.
© 2008 Cummins Inc., Box 3005, Columbus, IN 47202-3005 U.S.A. Printed from QuickServe® Online.
All Rights Reserved. Last Modified: 07-Feb-2021
File: 460-t06-2448 Page 6 of 8
Verification
Conditions
• Turn keyswitch OFF.
• Disconnect the engine coolant level sensor from the OEM wiring harness.
• Disconnect the OEM wiring harness connector from the ECM.
Action
• Inspect the pins and connectors for damage. Refer to Procedure 019-361
• Measure the resistance between the coolant level sensor SIGNAL pin at the OEM wiring harness ECM connector
and all other pins at the OEM wiring harness ECM connector.
• Measure the resistance between the coolant level sensor SUPPLY pin at the OEM wiring harness ECM connector
and all other pins at the OEM wiring harness ECM connector.
• Refer to the circuit diagram or wiring diagram for connector pin identification.
Specification
• A malfunctioning OEM wiring harness has been detected if the resistance is less than the following specification:
100k Ω
Linked Solutions
• None
Repair
• Repair or replace the OEM wiring harness. Refer to Procedure 019-071
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.
© 2008 Cummins Inc., Box 3005, Columbus, IN 47202-3005 U.S.A. Printed from QuickServe® Online.
All Rights Reserved. Last Modified: 07-Feb-2021
File: 460-t06-2448 Page 7 of 8
Verification
Conditions
• Connect all components.
• 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.
• 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 revision listed in the ECM calibration
revision history for applicable changes.
Specification
• If a calibration update for this fault code is available, the ECM calibration revision must be that revision or higher.
Linked Solutions
• None
Repair
• Prior to downloading the ECM calibration, check to see that all job images and all other troubleshooting has been
documented as downloading an ECM calibration will remove the fault codes on the ECM.
• Download the updated ECM calibration code. Refer to Procedure 019-032
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.
© 2008 Cummins Inc., Box 3005, Columbus, IN 47202-3005 U.S.A. Printed from QuickServe® Online.
All Rights Reserved. Last Modified: 07-Feb-2021
File: 460-t06-2448 Page 8 of 8
Verification
Conditions
• Turn keyswitch OFF.
Action
• Verify all preceding solution verifications for this fault code have been performed.
Specification
• If the fault code is still active after all the preceding solution verifications have been performed, then a
malfunctioning coolant level sensor has been detected.
Linked Solutions
• None
Repair
• Replace engine coolant level sensor. Refer to Procedure 019-017
Refer to OEM Service Manual
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.
© 2008 Cummins Inc., Box 3005, Columbus, IN 47202-3005 U.S.A. Printed from QuickServe® Online.
All Rights Reserved. Last Modified: 07-Feb-2021