This guide provides troubleshooting steps to resolve Doosan engine fault code P060C, which indicates an ECU hardware error – ECU Com ROM shut-off path error.
Preparations:
Doosan Data Monitoring System DMS-5 DMS-3 Free Download
Trouble Code Details
- Fault Code: P060C
- SPN Codes: 520619 / 520641 / 520642 / 520633 / 520654
- FMI: 12
Possible Causes:
- Plausibility error between the function controller and monitoring module.
- ECU internal communication failure or ROM check error.
- SPI (Serial Peripheral Interface) communication issues.
- Shut-off path test failure due to under-voltage or over-voltage detection errors.
Effect on Engine Performance:
- SVS (Service Signal) activated.
- Torque limit set to 0%, reducing engine performance.
Troubleshooting Guide
1. Circuit Description
This fault is related to ECU internal communication and hardware errors, affecting how the controller and monitoring module interact.
2. Component Location
- The issue occurs inside the ECU (Electronic Control Unit).
3. Diagnostic Conditions
- The diagnostic process runs during the alarm task raster or after the engine is turned off (post-drive analysis).
4. Fault Code Activation Conditions
The fault code sets if multiple errors are detected, including:
✔ Function controller and monitoring module plausibility errors.
✔ ECU internal communication failure.
✔ ROM check errors.
✔ SPI communication faults.
✔ Shut-off path errors (under-voltage or over-voltage detection failures).
✔ Timeout errors when setting or canceling alarm tasks.
5. Fault Code Clearing Conditions
- None – This fault code does not clear automatically and requires troubleshooting and repair.
Check List for Resolution
✔ Perform a full ECU scan using diagnostic tools to verify communication errors.
✔ Check ECU power supply for voltage irregularities (under-voltage or over-voltage).
✔ Inspect wiring and connectors for damage or loose connections.
✔ Reset ECU and reload software firmware if needed.
✔ Replace ECU if hardware failure is confirmed.
Once the issue is resolved, perform a system reset and verify if the fault code disappears.
More topics for Doosan,please refer to:Doosan Trouble Repair
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