What is Doosan Excavator Fault Code E000110-16?

Fault Code E000110-16 indicates a hydraulic pump solenoid circuit malfunction, specifically a short to ground condition in the main pump control valve solenoid wiring or component. This diagnostic trouble code (DTC) is triggered when the Electronic Control Module (ECM) detects an abnormal electrical resistance or voltage drop in the hydraulic pump's proportional solenoid circuit, indicating current is flowing to ground instead of through the proper circuit path.

This code is critical for Doosan excavators because the hydraulic pump solenoid directly controls the swash plate angle or displacement of the main hydraulic pump. When this circuit malfunctions, the ECM cannot properly regulate hydraulic flow and pressure, severely impacting all machine functions including boom, arm, bucket, and swing operations. On used excavators, this fault often indicates deteriorated wiring insulation or corroded connections that have developed over years of vibration and exposure to harsh operating environments.

Common Symptoms

• Sudden loss of hydraulic power across all functions or intermittent hydraulic performance during operation
• Warning light illumination on the instrument cluster, often accompanied by an audible alarm
• Machine entering derate mode or complete shutdown to prevent damage to hydraulic components
• Erratic hydraulic response where controls feel sluggish, unresponsive, or inconsistent
• ECM logging multiple related codes alongside E000110-16, particularly other electrical circuit faults

Potential Causes

The most common technical causes for this fault code on used Doosan excavators include:

• Damaged or chafed wiring harness where insulation has worn through, allowing conductors to contact the machine frame (especially common near the pump mounting area where vibration is highest)
• Corroded or moisture-contaminated connector pins at the pump solenoid connection point
• Failed hydraulic pump solenoid with internal short circuit to its housing
• Degraded harness routing grommets allowing wire movement and eventual insulation failure
• ECM internal driver circuit failure (less common, but possible on high-hour machines)
• Aftermarket repairs using incorrect wire gauge or improper splice connections

How to Troubleshoot and Fix Code E000110-16

Step 1: Visual Inspection and Connector Check Begin by disconnecting the battery negative terminal for safety. Locate the main hydraulic pump solenoid connector (typically mounted directly on the pump body). Inspect the connector for corrosion, bent pins, moisture intrusion, or oil contamination. Check the wiring harness from the solenoid back to the ECM for obvious chafing points, particularly where the harness passes through bulkheads or contacts the frame.

Step 2: Electrical Testing with Multimeter With the solenoid connector disconnected, use a digital multimeter to measure resistance between the solenoid harness connector pin (machine side) and chassis ground. You should read infinite resistance (open circuit). Any measurable resistance (typically below 10,000 ohms) confirms a short to ground. Next, check the solenoid itself by measuring resistance across its terminals—compare against Doosan specifications (usually 3-8 ohms for these solenoids).

Step 3: Advanced Diagnostics and Repair Connect Doosan diagnostic software (G-SCAN or equivalent) to perform active solenoid tests and monitor real-time voltage output from the ECM. For used excavators, pay special attention to harness wear at pivot points and replace any suspect sections rather than attempting field repairs with electrical tape. If the solenoid tests faulty, replace it with OEM or quality aftermarket parts. After repairs, clear codes, operate the machine through full hydraulic cycles, and verify the code does not return.

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Disclaimer: This guide provides general troubleshooting information for experienced technicians. Always consult the official Doosan service manual for your specific machine model and serial number. If you lack proper diagnostic tools or electrical troubleshooting experience, consult a certified Doosan technician to prevent further damage or safety hazards.