ATC 000876.09 – Compressor Clutch Incorrect CAN BUS Message. John Deere System Advisory.

ATC 000876.09 (ATC 876.09)

Code: 000876.09

Shortcode: 876.09


The error code, ATC 000876.09, is triggered due to issues in the data transfer between the power module (HF) PC6 and the ATC control unit. The control unit is experiencing intermittent or nonexistent reception of one or more CAN BUS messages intended for the power module (HF) PC6. This problem could stem from issues such as loose wiring or other connectivity problems within the CAN BUS system.


The erratic communication may lead to improper functioning of the compressor clutch, affecting the performance of the air conditioning system. This could result in inadequate cooling or unexpected system behavior, impacting cabin comfort and potentially system safety.


  • Inspect CAN BUS Connections: Check all CAN BUS connections, especially those between the ATC control unit and the power module (HF) PC6, for looseness, corrosion, or damage.
  • Test CAN BUS Integrity: Utilize diagnostic tools to test the integrity and functionality of the CAN BUS, looking for errors or poor connections that could disrupt communication.
  • Secure Loose Wiring: Ensure that all wiring is properly secured and making good contact. Tighten any loose connections and replace damaged wires or connectors.
  • Reprogram or Reset Modules: Consider reprogramming or resetting the affected modules to ensure that all settings are correct and that the modules can properly communicate.
  • Monitor System Performance: After repairs, closely monitor the system performance to ensure that the CAN BUS messages are being transmitted and received without interruption.


Maintaining robust and reliable communication across control systems is crucial for the safe and efficient operation of machinery. Regular monitoring and maintenance of the CAN BUS and associated electronics are essential to prevent communication failures and ensure that the equipment operates smoothly. Addressing communication issues promptly is key to minimizing downtime and maintaining operational efficiency.