ATC 000876.01 – Compressor Clutch Power Supply Fault. John Deere System Advisory.

ATC 000876.01 (ATC 876.01)

Code: 000876.01

Shortcode: 876.01


The error code, ATC 000876.01, is triggered when the power module (HF) PC6 detects a supply voltage of less than 3 volts at the compressor clutch output (lead 0732) when the compressor clutch (M02) is activated. This low voltage indicates a potential issue with the power supply, such as a poor connection, insufficient voltage from the source, or a fault within the power module itself.


The insufficient voltage to the compressor clutch may prevent it from engaging properly, affecting the operation of the HVAC (Heating, Ventilation, and Air Conditioning) system. This could lead to inadequate cooling performance and discomfort within the cabin environment.


  • Inspect Power Module and Connections: Check the power module (HF) PC6 and its connections, particularly at lead 0732, for any signs of damage, corrosion, or loose connections that could result in low voltage supply.
  • Measure Voltage Supply: Use a multimeter to measure the voltage at the compressor clutch output when it is activated. Confirm whether the voltage is consistently below the required level.
  • Check Source Voltage: Verify that the source voltage feeding into the power module is adequate and stable, as issues here could affect downstream outputs.
  • Replace or Repair Faulty Module: If the power module is found to be defective, replace or repair it to ensure proper voltage regulation and distribution.
  • Test System After Repair: After any necessary repairs or replacements, test the compressor clutch and the HVAC system to ensure they are operating correctly and that the fault code does not reoccur.


Ensuring that the compressor clutch and associated power module operate correctly is crucial for maintaining the efficiency and reliability of the HVAC system in heavy machinery. Regular preventive maintenance and timely resolution of power supply issues can help avoid operational disruptions and extend the lifespan of the equipment.