SIC 523871.18 – M14 Stepper Motor EICV 3, Hydraulic Oil Temperature and Supply Voltage Too Low

SIC 523871.18 (SIC )

Code: 523871.18



This error code, SIC 523871.18, is generated when the system voltage (battery voltage) at the stepper motor of EICV 3 (Electro-Hydraulic Integrated Control Valve) is between 9 and 11 volts, and the hydraulic oil temperature is between 25°C (13°F) and 15°C (5°F).


When this error code is detected, the performance of EICV 3 may be impaired due to suboptimal supply voltage and hydraulic oil temperature, leading to potential operational issues.


  • Inspect Power Supply:
    • Check the power supply to ensure it provides a stable voltage within the specified range. Repair or replace any components that are not functioning correctly.
  • Measure Voltage:
    • Use a multimeter to measure the supply voltage at the stepper motor to ensure it is within the required range (above 11 volts).
  • Check Hydraulic Oil Temperature:
    • Ensure the hydraulic oil is maintained at an optimal temperature. Use heating elements if necessary to increase the oil temperature.
  • Test Stepper Motor:
    • Test the stepper motor to ensure it is functioning correctly under the given conditions. Replace if necessary.
  • Update Software:
    • Ensure that the control unit firmware and software are up to date to rule out any software-related issues affecting temperature and voltage regulation.


Operating with low hydraulic oil temperature and supply voltage can lead to suboptimal performance and potential damage to the stepper motor. Regular inspection and maintenance of the power supply and hydraulic system are essential. If the problem persists, consult technical support for further diagnosis and repair.

Control Units: John Deere

John Deere Parts
John Deere Logo