John Deere ACU523970.02 – Armrest Display Unit (ADU) or dedicated camera module controller: ActiveVision Camera Autofocus Problem

This fault code indicates a malfunction in the automated camera system's ability to focus automatically, most likely within the ActiveVision system. When the cameras located on the clean grain or tailings elevators cannot focus, the Auto Maintain system is unable to accurately analyze grain quality and foreign material. This prevents the combine from automatically adjusting critical settings such as threshing speed, concave clearance, and fan speed.

• S650
• S660
• S670
• S680
• S690
• S760
• S770
• S780
• S790
• X-Series

1. 1

   Check for Software Updates: Ensure all controllers, especially for the video and display, are running the latest software version (a dealer may be required for this step).

2. 2

   Clean Camera Lenses: Carefully clean the camera lenses on the clean grain and tailings elevators according to the operator's manual instructions, as the system can detect if a lens is dirty.

3. 3

   Inspect Wiring and Connectors: Check the wiring harnesses leading to the cameras for any signs of damage, abrasion, or loose connections. On S-Series combines, check the right-hand main harness near the operator's station. Ensure connectors are secure and free of corrosion.

4. 4

   Check for Obstructions: Verify that there is nothing physically blocking the camera's view.

5. 5

   Review Display Settings: Check the camera settings in the CommandCenter display to ensure they are configured correctly. View the live feed from the cameras to visually assess the image quality.

1. 1

   Cycle power

   After performing the initial diagnostic checks (cleaning, inspection), cycle power to the machine and see if the fault code clears and if the camera image is sharp.

2. 2

   Evaluate software and hardware

   If the issue persists, and a software update does not resolve it, the problem is likely with the camera hardware or its dedicated controller.

3. 3

   Determine scope of malfunction

   If only one camera feed (e.g., clean grain) is out of focus, the issue is most likely the camera itself. If multiple camera systems are malfunctioning, the problem could lie with a central controller or a shared power/ground circuit.

4. 4

   Isolate the issue

   To isolate the issue, if possible, swap the connectors between the clean grain and tailings cameras. If the 'Autofocus Problem' moves with the camera, the camera is faulty. If the problem stays with the same input channel, the issue may be in the wiring or controller.

5. 5

   Replace faulty camera

   If a camera is determined to be faulty, it must be replaced.