What is Doosan DX150LC-9C Fault Code E000110-04?

Fault Code E000110-04 indicates a communication error or voltage abnormality in the Engine Control Module (ECM) to Machine Controller network on the Doosan DX150LC-9C excavator. This diagnostic trouble code (DTC) specifically points to a CAN bus communication failure or improper voltage signal between the engine's electronic control unit and the main machine controller, which coordinates hydraulic functions and operator display systems.

This code is critical because the DX150LC-9C relies on continuous data exchange between its Doosan D34 engine ECM and the machine's primary controller to regulate engine output, hydraulic flow, and implement safety protocols. When communication breaks down, the excavator may enter a protective derate mode or experience erratic hydraulic response, significantly impacting productivity and potentially causing unsafe operating conditions.

Common Symptoms

When fault code E000110-04 is active, operators typically experience:

• Warning light illumination on the instrument cluster, often accompanied by a "Check Engine" or communication error icon
• Reduced engine power or derate mode, limiting RPM to protect the powertrain from uncoordinated operation
• Erratic hydraulic function, including inconsistent swing speed, boom movement delays, or unresponsive auxiliary circuits
• Intermittent gauge failures on the digital display, with tachometer, fuel level, or coolant temperature readings dropping out randomly
• Engine shutdown in severe cases, particularly if multiple communication attempts fail during operation

Potential Causes

The most common technical causes for E000110-04 in used Doosan excavators include:

• Corroded or damaged CAN bus wiring harness connectors, especially at bulkhead pass-throughs near the engine compartment where vibration and moisture accumulate
• Failed terminating resistors on the CAN network, typically located inside the ECM or machine controller harness connectors
• Voltage supply issues to either the ECM or machine controller, often caused by failing relays, corroded ground points on the frame rail, or weak battery connections
• ECM internal failure or corrupted software, though less common than harness issues in machines with 3,000+ operating hours
• Physical harness damage at known wear points: behind the cab where harnesses flex during slewing, and along the right-hand frame rail where rubbing against structural components occurs

How to Troubleshoot and Fix Code E000110-04

Step 1: Visual Inspection and Voltage Verification Begin by inspecting all CAN bus harness connectors between the engine ECM (located on the right side of the engine block) and the machine controller (mounted under the operator cab). Look specifically for green corrosion, bent pins, or moisture intrusion in the Deutsch-style connectors. Using a digital multimeter, verify battery voltage (12-14V) at both the ECM and machine controller power supply pins with the key in the ON position.

Step 2: CAN Bus Resistance Testing With the ignition OFF and both controllers disconnected, measure resistance across the CAN-High and CAN-Low terminals of the network. You should read approximately 60 ohms, indicating proper terminating resistors. A reading of 120 ohms or infinite resistance suggests a failed terminator or open circuit in the harness. For used excavators, physically trace the twisted-pair CAN wiring along its entire route, checking for chafing at cable ties and frame contact points.

Step 3: Advanced Diagnostics with Scan Tool Connect Doosan DMS (Diagnostic & Maintenance System) or a compatible J1939 diagnostic scanner to the machine's diagnostic port. Monitor live CAN bus traffic and check for intermittent message failures between the ECM and machine controller. Clear the fault code and operate the machine while observing communication status. If the code returns immediately, suspect ECM or controller internal failure; if it appears only during operation, focus on harness flexing points and connector seating issues.

Critical Note for Used Equipment: Before replacing expensive controllers, thoroughly clean all ground connection points on the frame (especially behind the cab and near the battery box), apply dielectric grease to all CAN connectors, and repair any visible harness wear with proper shielded wire to maintain signal integrity.

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Disclaimer: This guide provides general troubleshooting information for educational purposes. Always consult the official Doosan service manual for your specific machine serial number and consider engaging a certified Doosan technician for complex electrical diagnostics, especially when working with safety-critical control systems.