Overview
| CODE | REASON | EFFECT |
| Fault Code: 1922 PID: S324 SPN: 3251 FMI: 0/0 LAMP: Red SRT: |
The soot load of the aftertreatment diesel particulate filter has exceeded the recommended limits. Engine protection derate is enabled.
|
Possible reduced engine performance. |
Circuit Description
The engine aftertreatment system monitors the soot load in the aftertreatment diesel particulate filter. Under normal operating conditions, the aftertreatment diesel particulate filter is self-cleaning, where soot is converted to carbon dioxide, nitrogen, and water. Under light load operating conditions, it can be necessary to perform a stationary regeneration of the aftertreatment diesel particulate filter. The soot load in the aftertreatment diesel particulate filter is estimated, using the aftertreatment differential pressure sensor and the calculated soot output of the engine.
Component Location
The aftertreatment diesel particulate filter is located in the exhaust system and is installed by the original equipment manufacturer (OEM). Refer to the OEM service manual.
Conditions for Running the Diagnostics
This diagnostic runs continuously when the engine is running.
Conditions for Setting the Fault Codes
{
The Engine Control Module (ECM) detected the soot load of the aftertreatment diesel particulate filter had exceeded the maximum operating limits.
Action Taken When the Fault Code is Active
- The ECM illuminates the red STOP ENGINE lamp immediately after the diagnostic runs and fails.
- Torque output of the engine will be reduced as the soot load in the aftertreatment diesel particulate filter increases.
- Active and stationary regeneration of the diesel particulate filter will be disabled.
- Exhaust gas recirculation (EGR) valve operation will be disabled.
Conditions for Clearing the Fault Code
- The ECM will turn off the red STOP ENGINE lamp immediately after the diagnostic runs and passes.
- 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.
- It is necessary to use the “Reset All Faults” command in the recommended Cummins® electronic service tool or equivalent to clear this fault.
Shop Talk
Possible causes of this fault code include:
- Restricted intake air filter.
- Malfunctioning or damaged EGR valve
- Frozen, plugged, or restricted aftertreatment DPF differential pressure sensor tubes.
- Malfunctioning or damaged aftertreatment diesel particulate filter differential pressure sensor.
- Malfunctioning or damaged aftertreatment diesel particulate filter
Troubleshooting Summary
- Fault Code 1922 requires that ALL solutions be performed
- Check for primary fault codes
- Technical Service Bulletin is available
- Restricted intake air filter
- EGR valve is leaking internally
- Aftertreatment DPF differential pressure sensor tubes plugged
- Aftertreatment DPF differential pressure sensor stuck in-range
- Aftertreatment DPF is malfunctioning
- Air Handling Performance Test
- ECM calibration revision history check
Solution: S00000603
Verification
Conditions
- Turn keyswitch OFF.
Action
- This solution is information only.
- ALL solutions displayed for this fault code must be performed.
- Continue to perform the verifications of ALL solution steps listed for this fault code regardless if a given solution is within specification or out of specification.
- If redirected in this troubleshooting to another fault code or symptom it is required to come back to this fault code troubleshooting and complete every step.
Specification
- This solution is information only.
Linked Solutions
- None
Repair
- If a resolution is found in any solution for this fault code, continue performing ALL solutions listed for this fault code.
Validation
- None
Solution: S00010354
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 regeneration: 2777, 4213, 6416
- Aftertreatment differential pressure: 1879, 1881, 1883, 5715
- Aftertreatment DPF: 2754, 3133, 3134, 3135, 3316, 3317, 3318, 3319, 3321, 3322, 3396
- Aftertreatment DOC: 3313, 3314, 3315
- Fuel: 559, 1139, 1141, 1142, 1143, 1144, 1145, 4713
- Engine misfire: 1654, 1655, 1656, 1657, 1658, 1659
- EGR: 1228, 1896, 2272, 2349, 2353, 2357, 3136, 3137, 3138
- Turbocharger: 1898, 2198, 2387, 2449, 2634, 2635, 2636, 3616
- Intake manifold: 2973
- Intake throttle: 175, 176, 177, 3539, 3541, 3542, 5879, 5881, 5882
- EGR differential pressure: 1866, 2273, 2274
Linked Solutions
- None
Repair
- Perform a search on the appropriate fault codes.
Validation
- None
Solution: S00011076
Verification
Conditions
- Turn keyswitch OFF.
Specification
- Proceed to the Repair section if the Technical Service Bulletin is applicable.
Linked Solutions
- None
Repair
- Complete the action outlined in the Technical Service Bulletin.
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.
Solution: S00000025
Verification
Conditions
- Turn keyswitch OFF.
Action
- Visually inspect the air filter to make sure it is not plugged.
Specification
- If the intake air filter is plugged, then a restricted intake air filter has been detected.
Linked Solutions
- None
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.
Solution: S00010364
Verification
Conditions
- Turn keyswitch OFF.
Specification
- If a specification is not met, then proceed to the Repair section.
Linked Solutions
- None
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.
Solution: S00001183
Verification
Conditions
- Turn keyswitch OFF.
Action
- Inspect the aftertreatment DPF differential pressure sensor tubes for signs of damage, plugging, kinks, leakage or loose connections.
Specification
- If plugging or damage is found, then proceed to the Repair section.
Linked Solutions
- None
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.
Solution: S00000793
Verification
Conditions
- Turn keyswitch ON.
- Connect the recommended Cummins® electronic service tool or equivalent.
Action
- Use the recommended Cummins® electronic service tool or equivalent.
- Monitor the aftertreatment DPF differential pressure sensor voltage.
Specification
- If the aftertreatment DPF differential pressure sensor voltage readings are not within specification, then a malfunctioning aftertreatment DPF differential pressure sensor has been detected.
Linked Solutions
- None
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.
Solution: S00004545
Verification
Conditions
- Turn keyswitch ON.
- Connect the recommended Cummins® electronic service tool or equivalent.
Action
- If the aftertreatment DPF has already been replaced during this repair, then proceed to the next solution.
- Use the recommended Cummins® electronic service tool or equivalent to read the fault codes.
Specification
- If the fault code is active or inactive with more than one count within the last 25 engine operating hours, then a plugged or restricted aftertreatment DPF has been detected.
Linked Solutions
- None
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.
Solution: S00009149
Verification
Conditions
- Reconnect previously disconnected components.
- Turn keyswitch ON.
- Connect the recommended Cummins® electronic service tool or equivalent.
Action
- Use the recommended Cummins® electronic service tool or equivalent.
- Perform the Air Handling Performance Test.
Specification
- If the Air Handling Performance Test does not pass, then reset the search to Air Handling Performance Test Did Not Pass. Only select the solution title that matches the error messages in the recommend Cummins® electronic service tool or equivalent.
- If the Air Handling Performance Test will not start, then reset the search to Air Handling Performance Test Did Not Start.
- If the Air Handling Performance Test does not complete, then reset the search to Air Handling Performance Test Did Not Complete.
Linked Solutions
- None
Repair
- No additional action is required for this solution.
Validation
- None
Solution: S00000443
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.
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.