Overview
| CODE | REASON | EFFECT |
| Fault Code: 6771 PID: SPN: 521032 FMI: 14/14 LAMP: Red SRT: |
Aftertreatment System Assembly – Special Instructions. The incorrect aftertreatment diesel particulate filter system has been installed with the engine
|
None on performance. |
Circuit Description
Because engines and aftertreatment components are manufactured in different locations, they are shipped to OEM customers for final vehicle assembly. The process involves both hardware and software elements in detecting the correct match of aftertreatment system to engine model during initial engine to machine integration.
Component Location
The aftertreatment temperature sensor module is mounted on the aftertreatment diesel particulate filter.
Conditions for Running the Diagnostics
This diagnostic runs at key ON in the first 50 hours of engine run time.
Conditions for Setting the Fault Codes
The Engine Control Module (ECM) detected the engine has been manufactured with the incorrect aftertreatment System.
Action Taken When the Fault Code is Active
- The ECM illuminates the red STOP ENGINE lamp immediately after the diagnostic runs and fails.
Conditions for Clearing the Fault Code
- To validate the repair, perform a key cycle, and leave the key in the ON position for 2 minutes.
- 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 red STOP 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, as well as extinguish the MIL for OBD applications.
Shop Talk
The purpose of this fault code is to indicate when the wrong aftertreatment system has been mated to the engine during the equipment assembly process. If this fault code is active, the aftertreatment part numbers should be verified.
Troubleshooting Summary
Solution: S00001141
Verification
Conditions
- Turn keyswitch ON.
- Connect the recommended Cummins® electronic service tool or equivalent.
Action
- Use the recommended Cummins® electronic service tool or equivalent.
Specification
- This fault code indicates that the incorrect aftertreatment diesel particulate filter system has been installed with the engine. Verify the correct aftertreatment diesel particulate filter system has been installed with the engine.
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: 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.