What is Doosan DX220LC-9C Fault Code E000108-01?

Fault Code E000108-01 indicates a communication error or malfunction in the Engine Control Module (ECM) to Main Control Unit (MCU) CAN bus communication system. This code specifically signals that the excavator's main computer has detected an abnormal signal or complete loss of data transmission between the engine's electronic control system and the machine's central monitoring unit.

In the DX220LC-9C model, this fault affects the Controller Area Network (CAN) that allows the engine ECM and machine MCU to exchange critical operational data. When this communication pathway fails, the excavator cannot properly coordinate engine performance with hydraulic demands, leading to reduced efficiency and potential safety concerns. This code is particularly critical because it affects the machine's ability to regulate power output, monitor emissions systems, and provide accurate diagnostic information to the operator display.

Common Symptoms

When Code E000108-01 is active, operators typically experience:

• Warning light illumination on the instrument cluster, often accompanied by a buzzer or alarm
• Reduced engine power or derate mode, limiting machine performance to protect components
• Intermittent or complete loss of engine parameter displays (RPM, coolant temperature, fuel level)
• Erratic hydraulic response due to improper engine-to-hydraulic system coordination
• Multiple secondary fault codes appearing simultaneously as systems lose communication

Potential Causes

The most common technical reasons for E000108-01 in used excavators include:

• CAN bus wiring harness damage from rubbing against frame components, particularly near the engine mount points or along the right-side chassis rail (known wear point on DX-9C series)
• Corroded or loose connector pins at the ECM (C101) or MCU (C201) harness connections due to moisture intrusion
• Failed termination resistor in the CAN network (120-ohm resistor failure)
• ECM or MCU internal failure, though less common than wiring issues in used machines
• Voltage supply problems to either control module, often from battery or alternator degradation
• Aftermarket component interference if non-OEM monitors or accessories were installed

How to Troubleshoot and Fix Code E000108-01

Step 1: Visual Inspection Begin by thoroughly inspecting the main wiring harness between the engine ECM (located on the right side of the engine) and the cab-mounted MCU. Look for abraded insulation, pinched wires, or damaged connectors. On used excavators, pay special attention to harness routing near hydraulic lines and structural contact points where years of vibration cause wear.

Step 2: Connector and Voltage Testing Disconnect the ECM connector C101 and MCU connector C201. Inspect pins for corrosion, bent terminals, or moisture. Using a digital multimeter, verify supply voltage at the ECM (should read 24V DC ±2V with key on). Check ground continuity (should read less than 1 ohm resistance to chassis ground).

Step 3: CAN Bus Integrity Check With connectors disconnected and ignition off, measure resistance between CAN-High and CAN-Low terminals at both the ECM and MCU connectors. You should read approximately 60 ohms (indicating two 120-ohm termination resistors in parallel). A reading of 120 ohms suggests one termination resistor has failed; an open circuit indicates wiring damage.

Step 4: Advanced Diagnostics Connect Doosan DMS (Diagnostic Master System) or compatible diagnostic software. Monitor real-time CAN bus traffic and error frame counts. Excessive error frames point to signal quality issues from damaged wiring rather than module failure.

Step 5: Repair and Verification Replace damaged harness sections using OEM-spec CAN bus cable (twisted pair, shielded). Ensure proper shielding continuity and secure routing away from high-voltage components. Clean all connector pins with electrical contact cleaner and apply dielectric grease to prevent future corrosion. After repairs, clear codes and perform a complete machine function test under load.

---

Disclaimer: This guide provides general troubleshooting information. Always consult the official Doosan service manual for your specific serial number range and consider professional diagnostic assistance for complex electrical issues, especially when working with high-voltage systems on construction equipment.