Komatsu Fault Code

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DX19KZ

Travel Motor Shift Malfunction / Active E03 Alarm

System

Hydraulic

Symptom

Travel Motor Shift Malfunction / Active E03 Alarm

Diagnosis & fix steps

LOGIC: Travel Motor Solenoid 1 Short or Discontinuity. ACTION: Check harness routing along the undercarriage frame rail for pinch points. Measure resistance directly at the dual-displacement travel motor solenoid coil.

Red Seal field insights

Action Code Logic: The E03 action code triggers a warning buzzer demanding immediate machine shutdown because electrical signal loss defaults the motor displacement, posing high runaway risks on slopes.

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