ECU Wiring Tier2 Removal on Doosan DA30 Dump Truck

Here’s a summarized and step-by-step guide to remove the ECU wiring for the Doosan DA30 Dump Truck Tier 2:

1. Drain Coolant:
   • Drain the engine coolant as per the cooling system work descriptions.
2. Clean Rocker Covers:
   • Thoroughly wash the rocker covers and surrounding areas.
3. Remove Inlet Pipe:
   • Detach the inlet pipe between the turbocharger and the air cleaner.
     
4. Remove Air Line:
   • Disconnect the air line to the compressor located on the left-hand cable duct.
5. Unplug Connectors:
   • Unplug all connectors from the control unit.
6. Remove Rocker Covers:
   • Remove the rocker covers. For the 12-liter engine, remove the crankcase ventilation before the rocker cover on cylinder 1.
     
7. Disconnect Unit Injector Cables:
   • Disconnect the cables from the unit injectors. Unscrew the screws as far as possible (they cannot be fully removed).
8. Mark Cables:
   • Mark each cable with its respective cylinder number.
9. Remove Cable Duct:
   • Remove the cable duct attached to the cables. Unscrew the cable bushings in the lower rocker covers and remove the cables.
10. Remove Charge Air Sensor:

• Remove the charge air sensor and its clamps.

11. Disconnect Electrically-Controlled Fan:

• On engines with an electrically-controlled fan, disconnect the connector on the fan ring connected to the solenoid valve. Remove the cable clamps as well.

12. Remove Oil Pressure Sensor:

• Remove the oil pressure sensor and its clamps.

13. Remove Coolant Temperature Air Sensor:

• Remove the coolant temperature air sensor and its clamps.
  

14. Related Product:

• Doosan Excavator Inspection Diagnostic Tool DDT SCR DPF G2 Scan DCU ECU DMS-5 Hardware + Software V2024.04 .

This guide provides a comprehensive method for removing the ECU wiring on a Doosan DA30 Dump Truck with a Tier 2 engine. Ensure to follow each step carefully to avoid any damage or issues during the process.