What is Doosan Excavator Fault Code E000111-17?

Fault Code E000111-17 indicates a malfunction in the hydraulic pump solenoid control circuit, specifically detecting an open circuit or excessive resistance in the electrical pathway. This code is triggered when the Electronic Control Module (ECM) detects abnormal voltage feedback from the proportional solenoid valve that regulates hydraulic pump output pressure and flow.

In Doosan excavators, this solenoid plays a critical role in matching hydraulic power delivery to operational demands. When the ECM cannot properly communicate with or control this solenoid, machine performance becomes severely compromised. The system relies on precise electrical signals (typically 12-24V PWM signals) to modulate hydraulic pressure, and any interruption in this circuit triggers E000111-17, placing the machine into a protective reduced-power mode.

Common Symptoms

• Reduced hydraulic power across all functions, with noticeably slower boom, arm, and bucket movements
• Illuminated warning light on the instrument panel, often accompanied by a wrench or hydraulic system icon
• Intermittent loss of power during operation, particularly when the machine is under load or during temperature fluctuations
• Erratic engine RPM response when hydraulic controls are activated, as the pump cannot adjust output properly
• Error message display showing E000111-17 on the monitor screen with potential automatic engine derate

Potential Causes

The most common causes in used Doosan excavators include:

• Damaged wiring harness near the hydraulic pump assembly, where vibration and heat cause insulation breakdown and wire chafing
• Corroded or loose connector pins at the solenoid valve connection point, especially on machines with high hour meters or exposure to moisture
• Failed proportional solenoid valve due to internal coil breakdown or mechanical wear from contaminated hydraulic fluid
• ECM internal fault or poor ground connections affecting the control circuit output
• Previous repair attempts that damaged wiring or created intermittent connections in the engine compartment harness

How to Troubleshoot and Fix Code E000111-17

Step 1: Visual Inspection Begin by locating the hydraulic pump solenoid (typically mounted on the main pump assembly). Inspect the wiring harness from the ECM to the solenoid for obvious damage, abrasion points where it contacts the frame, or evidence of previous repairs. Check all connector pins for corrosion, bent terminals, or moisture intrusion—common issues in used equipment.

Step 2: Electrical Testing Using a digital multimeter, disconnect the solenoid connector and measure coil resistance across the solenoid terminals. Typical values range from 3-8 ohms (consult your service manual). Next, check for supply voltage at the harness connector with the key on (should read battery voltage). Measure resistance to ground on both circuit wires—readings below 10k ohms indicate a short circuit.

Step 3: Advanced Diagnostics Connect Doosan diagnostic software (DMS or G-Scan) to read live data and perform solenoid actuation tests. Monitor PWM signal output from the ECM during commanded operation. If voltage and resistance values are correct but the code persists, the solenoid valve itself likely requires replacement. For used excavators, always clean all ground connection points on the pump and frame, as corrosion-induced high resistance is frequently overlooked.

Step 4: Repair and Verification Replace damaged harness sections using OEM-spec wire and heat-shrink connectors. Apply dielectric grease to all reconnected terminals. Clear codes, run the machine through full hydraulic cycles, and monitor for code recurrence.

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Disclaimer: This guide provides general troubleshooting information. Always consult your Doosan service manual and consider professional diagnostic services for complex electrical issues, especially on used equipment with unknown service history.