ATC 000923.04 – Fan Motor On, Current Too High. John Deere System Advisory.

ATC 000923.04 (ATC 923.04)

Code: 000923.04

Shortcode: 923.04


The error code, ATC 000923.04, is triggered when the power module (HF) PC6 measures current exceeding 30 amps at one or both fan motor outputs (lead 2043 and/or lead 2047) while the fan motors (M07 and M10) are activated. This high current reading typically indicates a short to ground within the circuit, which can cause excessive current flow, potentially leading to overheating, damage to the wiring or components, and possible electrical hazards.


The power module will likely initiate current overload protection to prevent damage by reducing current or shutting down the fan motors. This protective measure can impact the cooling efficiency of the system, affecting temperature regulation and component cooling within the machinery.


  • Inspect Wiring and Connections: Check the wiring and connections associated with leads 2043 and 2047 for any signs of damage, wear, or improper grounding that might be causing the short.
  • Measure Current and Inspect Circuits: Use a clamp meter to measure the current through the affected leads. Inspect the circuits for any anomalies or signs of shorts to ground.
  • Replace or Repair Damaged Wiring: If damaged wiring or components are identified, replace or repair them to restore normal operation and ensure the integrity of the circuit.
  • Test Fan Motor Operation: After repairs, test the fan motors to ensure they operate within the specified current limits and do not trigger the overload protection.
  • Review and Reset the System: After making the necessary repairs, review the system settings, reset any fault codes, and ensure the system operates normally under full load conditions.


Ensuring that fan motors and their associated circuits are properly maintained and free from electrical faults is crucial for maintaining the operational efficiency and safety of the machinery. Regular checks can help detect and address issues early, preventing costly repairs and downtime. Addressing high current issues promptly helps maintain the reliability and performance of critical cooling systems.