DTI 523773.04 – Vehicle CAN Bus Under-voltage Warning (CAN+)

DTI 523773.04 (DTI )

Code: 523773.04



This diagnostic trouble code (DTC) indicates that the CAN+ voltage in the vehicle’s CAN Bus system has dropped below 0.5 volts. This low voltage level is insufficient to maintain normal data transmission, which can halt communication across the CAN Bus, affecting the coordination and functionality of connected systems and devices.


To prevent data corruption or loss, data transmission on the CAN Bus may be stopped, potentially leading to errors in system functionality or operational failures.


  • Inspect and Test Electrical System: Check for issues like poor connections, damaged wires, or faulty components that could be causing the voltage drop.
  • Measure Voltage Levels Regularly: Use a multimeter to monitor the CAN+ voltage levels to ensure they are within the normal operating range.
  • Enhance Electrical Connectivity: Ensure all connections are secure and improve grounding if necessary to stabilize voltage levels.


It is critical to maintain adequate voltage levels on the CAN Bus to ensure reliable and uninterrupted data communication. Regular electrical inspections and corrective measures are recommended to address any voltage issues promptly.

Control Units: John Deere

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