Komatsu Fault Code

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DXE5KA

Slow Attachment Movement / No Pump Merge

System

Hydraulic System

Symptom

Slow Attachment Movement / No Pump Merge

Diagnosis & fix steps

LOGIC: Main Pump Confluence / Diverter Solenoid Valve Open Circuit. ACTION: Measure resistance across the confluence solenoid coil (typically 20–30Ω). Check harness pins at the solenoid connector for push-out or corrosion.

Red Seal field insights

Prevents hydraulic flow from merging both main pumps during heavy excavation or rapid boom-up demands, drastically slowing machine speed.

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