What is Yanmar DX75-9C Fault Code E000110-00?

Yanmar DX75-9C Fault Code E000110-00 indicates an abnormality detected in the Engine Speed Sensor (Ne Sensor) signal circuit — specifically, the Engine Control Module (ECM) is receiving no signal or an erratic signal from the primary crankshaft position/engine speed sensor.

This sensor is critical for the ECM to accurately calculate injection timing, fuel delivery, and engine RPM management. On the DX75-9C platform, a loss of this signal can trigger immediate protective responses, as the engine cannot safely operate without reliable speed feedback.

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Common Symptoms

When fault code E000110-00 is active on the Yanmar DX75-9C, operators typically experience:

• Engine warning lamp illuminates on the instrument cluster
• Hard start or no-start condition — engine cranks but fails to fire
• Sudden engine shutdown during operation without warning
• Erratic RPM behavior — engine hunts, surges, or stalls under load
• Hydraulic system performance degradation due to engine RPM instability affecting pump output

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Potential Causes

The following are the most likely technical causes behind code E000110-00, particularly on used or high-hour machines:

• Failed or degraded Ne Sensor — internal sensor failure due to heat cycling and age
• Air gap misalignment between the sensor tip and reluctor ring/flywheel gear
• Damaged or corroded sensor connector — common on older excavators exposed to moisture and debris
• Chafed or broken sensor wiring harness — particularly at known flex points near the engine block and firewall
• Contaminated reluctor ring — metal shavings or debris interfering with the magnetic field
• ECM communication fault — rare, but possible on high-hour machines with prior electrical issues

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How to Troubleshoot and Fix Code E000110-00

Step 1 — Visual Inspection First Begin with a thorough visual inspection of the Ne Sensor, its harness, and connector. On used excavators, check specifically for harness chafing against engine block edges, zip-tie wear points, and corrosion inside the connector pins. Do not skip this step — the majority of sensor faults on used machines are wiring-related, not sensor failure.

Step 2 — Check Sensor Air Gap and Mounting Using a feeler gauge, verify the air gap between the sensor tip and the reluctor ring. The typical Yanmar specification is 0.5mm – 1.5mm. A shifted or loose sensor mount will cause intermittent signal loss. Also inspect the reluctor ring for missing teeth or metallic debris buildup.

Step 3 — Electrical Circuit Testing Using a digital multimeter, measure sensor resistance across the signal terminals (reference Yanmar service manual for model-specific values, typically 800Ω – 1,200Ω for passive sensors). Check supply voltage and ground integrity at the harness connector with the key-on. Use Yanmar Dr. ZX diagnostic software or compatible OBD tooling to monitor live sensor signal waveform for drop-outs.

Step 4 — Replace if Confirmed Faulty If resistance is out of specification or waveform confirms signal loss, replace the Ne Sensor with a genuine Yanmar OEM component. Clear codes via diagnostic software and perform a full operational test cycle.

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Disclaimer: This guide is intended for informational and diagnostic reference purposes. Always consult a certified Yanmar dealer or qualified heavy equipment technician before performing repairs. Improper diagnosis or repair may result in equipment damage, voided warranties, or personal injury.