CAB 524016.04 – Low Voltage in CAB Switched Supply

CAB 524016.04 (CAB )

Code: 524016.04



The fault code CAB 524016.04 occurs when the CAB control unit detects a low voltage condition in the switched battery supply voltage from the Cab Load Center (CLC) wake-up circuit, which is crucial for digital sensor excitation. Low voltage in this circuit can lead to insufficient sensor operation and potential malfunctions in the associated control units that depend on this power supply for accurate data reading and processing.


In response to the low voltage detection, the system restricts certain functions to prevent erratic operation or potential damage, maintaining stability while the issue is addressed.


  • Diagnose Associated CLC Codes: If other related 524016.XX codes are present, prioritize diagnosing and resolving these CLC issues as they may be contributing to the low voltage problem.
  • Check Battery and Charging System: Ensure that the vehicle’s battery is healthy and the charging system is functioning correctly, as issues here can directly impact the voltage supplied to the CLC.
  • Inspect CLC and Wiring: Examine the Cab Load Center and associated wiring for signs of damage, wear, or loose connections that might be causing the low voltage.
  • Measure and Document Voltage Levels: Use a multimeter to measure the voltage levels within the CLC wake-up circuit. Compare these readings with the specifications to pinpoint deviations.
  • Replace or Repair Faulty Components: If any components of the CLC or its circuit are found to be faulty, replace or repair them to restore proper voltage levels.
  • Reset and Recalibrate the System: After making any necessary repairs, reset the control unit to clear the fault code and recalibrate the system to ensure all functions are restored and operating correctly.


Regular maintenance of the electrical system, including the Cab Load Center and its circuits, is vital for the reliable operation of all connected control units. Ensuring that all components are functioning correctly and at proper voltage levels helps prevent operational issues and prolongs the life of the vehicle’s electronic systems.

Control Units: John Deere

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