What is Doosan DX220LC-9C Fault Code E000110-01?

Fault Code E000110-01 indicates a Main Pump Flow Control Solenoid Valve (SCV) circuit malfunction, specifically detecting an open circuit or electrical discontinuity in the hydraulic pump control system. This diagnostic trouble code (DTC) is generated by the Electronic Control Unit (ECU) when it cannot establish proper electrical communication with the main pump's proportional solenoid valve, which regulates hydraulic flow based on operator demand and engine load conditions.

This code is critical for the DX220LC-9C's performance because the flow control solenoid directly manages the excavator's hydraulic pump output. When this circuit fails, the machine cannot properly modulate hydraulic power, potentially causing reduced digging force, slow cycle times, or complete loss of hydraulic function. The DX220LC-9C utilizes an advanced load-sensing hydraulic system that depends on precise electronic control for optimal fuel efficiency and performance.

Common Symptoms

• Hydraulic system derate or complete loss of boom, arm, and bucket functions with the machine entering "limp mode"
• Yellow warning light illuminated on the instrument cluster, often accompanied by a continuous alarm
• Erratic hydraulic response where attachments move sluggishly or inconsistently regardless of joystick input
• Engine operates normally but hydraulic pumps fail to respond proportionally to control lever commands
• Error message displayed on the monitor showing fault code E000110-01 with pump-related icons

Potential Causes

The most common technical causes for this fault on used DX220LC-9C excavators include:

• Broken or frayed wiring harness near the main pump mounting area where constant engine vibration causes conductor fatigue
• Corroded connector pins at the solenoid valve plug, especially on machines operated in wet or coastal environments
• Failed main pump SCV coil due to internal winding short or open circuit from age-related degradation
• Damaged ECU output driver circuit that powers the solenoid valve control signal
• Contaminated connector seals allowing moisture intrusion at the pump-mounted electrical connections
• Chafed harness sections rubbing against the pump housing or hydraulic lines during normal operation

How to Troubleshoot and Fix Code E000110-01

Step 1: Visual Inspection of Harness and Connectors Begin by inspecting the main pump solenoid valve wiring harness from the ECU to the pump-mounted solenoid. On used excavators, focus on known rub points where the harness passes near the hydraulic tank and pump mounting bracket. Check for abraded insulation, bent connector pins, or greenish corrosion at terminals. Clean all connections with electrical contact cleaner and apply dielectric grease.

Step 2: Electrical Continuity and Resistance Testing Disconnect the solenoid valve connector at the main pump. Using a digital multimeter (DMM), measure resistance across the solenoid terminals—typically 10-15 ohms for DX-series proportional valves. Check for open circuit (infinite resistance) indicating coil failure. Test harness continuity from the ECU connector (typically pin locations 32 and 33 on the main harness) to the pump connector, confirming less than 1 ohm resistance.

Step 3: Voltage Supply Verification With the ignition on and connector still detached, check for supply voltage at the harness side (should read battery voltage, approximately 12-14V). If voltage is absent, trace back to the ECU and check fuses and relay circuits specific to the pump control system. Use Doosan's DMS-5 diagnostic software if available to command the solenoid valve and observe real-time voltage output.

Step 4: Component Replacement and Verification If electrical tests confirm solenoid failure, replace the main pump flow control solenoid valve assembly. For used machines, simultaneously replace connector seals and apply new protective sleeving to vulnerable harness sections. After replacement, clear codes using diagnostic software, operate all hydraulic functions through full range, and verify the fault does not return.

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Disclaimer: This guide provides general troubleshooting information for Doosan DX220LC-9C excavators. Hydraulic and electrical system repairs should be performed by qualified technicians with appropriate training. Always consult the manufacturer's service manual and safety procedures before conducting diagnostic work. Improper repairs may result in equipment damage or personal injury.