ACU 524105.03 – High Voltage in SCV II Control Lever Sensor

ACU 524105.03 (ACU )

Code: 524105.03



The error code ACU 524105.03 is triggered when there is an unusually high voltage detected in the sensor circuit of the SCV II (Selective Control Valve II) control lever. High voltage levels could be due to an electrical overload, a malfunction within the sensor, or improper circuit configurations, potentially leading to erroneous sensor readings.


To prevent any possible damage or incorrect operation of the hydraulic system due to this high voltage, the System Control Computer (SCC) has disabled the SCV II function.


  • Inspect the SCV II control lever sensor and its circuit for any signs of electrical issues such as shorts, overloads, or damaged components that could be causing the high voltage readings.
  • Use diagnostic equipment to measure and verify the voltage levels at the sensor. Ensure these readings compare against the manufacturer’s specified safe voltage ranges.
  • Check all related wiring and electrical connections for damage, wear, or improper fittings that might result in voltage spikes.
  • Evaluate the electrical system’s overall health, including checking for issues with voltage regulators or other components that might influence circuit voltages.
  • If necessary, recalibrate or replace the sensor to ensure it operates within normal voltage parameters. Make sure that any new or repaired components are properly integrated into the hydraulic system.


High voltage levels in control circuits can severely disrupt hydraulic system operations and pose safety risks. Regular monitoring and maintenance of the electrical system are crucial to detect and correct voltage issues promptly, ensuring reliable and safe machinery operation.