Doosan DX150LC-9C Fault Code E000108-00: Complete Diagnostic Guide

What is Doosan DX150LC-9C Fault Code E000108-00?

Fault Code E000108-00 indicates a communication error between the Engine Control Module (ECM) and the Main Controller on the Doosan DX150LC-9C excavator. This code specifically signals a CAN bus communication failure or interruption in the data exchange between critical control systems.

This fault affects the integrated control network that manages engine performance, hydraulic functions, and operator interface systems. The Controller Area Network (CAN) serves as the central nervous system for this excavator model, allowing real-time data sharing between the engine controller and main machine controller. When communication breaks down, the machine cannot properly coordinate engine output with hydraulic demands, potentially causing erratic performance or complete shutdown. For the DX150LC-9C's D34 engine platform, maintaining this communication link is essential for emissions compliance, fuel efficiency, and optimal hydraulic response.

Common Symptoms

When Code E000108-00 is active, operators typically experience:

• Engine warning lamp illuminated on the instrument cluster, often accompanied by a master caution light
• Intermittent or complete loss of engine power, with the machine entering a protective derate mode
• Erratic hydraulic response or sluggish boom/arm movements due to miscommunication between controllers
• Instrument panel malfunctions, including blank displays, frozen gauges, or flickering screens
• Engine may start but immediately shut down or refuse to crank when communication is completely lost

Potential Causes

The most common technical causes for this fault code on used DX150LC-9C excavators include:

• Damaged or corroded CAN bus wiring harness, particularly at flex points near the engine mount or along the upper/lower frame connection
• Loose or oxidized harness connectors at the ECM (located behind the operator cab) or main controller junction points
• Failed terminating resistors on the CAN network causing signal reflection and data corruption
• Water intrusion into the main wiring harness, common on machines operated in wet conditions or with damaged harness boots
• ECM or main controller internal failure, though less common than wiring issues in used equipment
• Voltage supply problems from the main battery or alternator causing controller resets during operation

How to Troubleshoot and Fix Code E000108-00

Step 1: Visual Harness Inspection Begin by thoroughly inspecting the main wiring harness from the ECM (engine side) to the main controller (frame-mounted). On used excavators, focus on known wear points: where the harness crosses the swing bearing, passes through bulkhead grommets, and routes along the engine deck. Look for chafed insulation, pinched wires, or green corrosion on copper conductors. Check all connector boots for cracks or missing seals that allow moisture entry.

Step 2: Connector and Termination Check Disconnect the CAN-H and CAN-L connectors at both the ECM and main controller. Inspect pins for corrosion, bent contacts, or pushed-back terminals. Use electrical contact cleaner and verify proper pin tension. Measure the terminating resistor across the CAN-H and CAN-L lines at each end of the network—you should read approximately 60 ohms total (two 120-ohm resistors in parallel). Incorrect resistance indicates a failed terminator or wiring short.

Step 3: Diagnostic Software Testing Connect Doosan DDS (Doosan Diagnostic System) software or a compatible J1939 diagnostic tool to the machine's diagnostic port. Monitor real-time CAN bus traffic and check for communication dropouts or error frames. Verify voltage levels on CAN-H (approximately 3.5V) and CAN-L (approximately 1.5V) during communication. Significant deviation indicates wiring resistance or controller output problems.

Step 4: Power Supply Verification Using a digital multimeter, check battery voltage at the ECM and main controller power pins—should be 24-28V DC with engine running. Test for voltage drops under load by activating hydraulic functions while monitoring. Inspect ground connections at the engine block and frame, cleaning contact surfaces and verifying less than 0.5 ohms resistance to battery negative.

For used excavators, harness flex fatigue is the leading cause of this fault. Before replacing expensive controllers, thoroughly test all wiring with an ohmmeter for continuity and insulation resistance (should exceed 10 megohms to ground). Replace any harness sections showing wear or repair damaged areas with proper CAN-spec twisted-pair wire and heat-shrink connections.

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Disclaimer: This guide provides general diagnostic information for Code E000108-00. Always consult the official Doosan service manual for your specific machine serial number and software version. If you're uncomfortable performing electrical diagnostics, contact a certified Doosan technician to prevent further damage to electronic systems.