John Deere ACU523970.04 – ACU: Autofocus Problem

The system is experiencing an autofocus issue with a machine camera, such as the ActiveVision cameras used to monitor the clean grain elevator and tailings. This fault hinders the camera's ability to capture clear images for analysis, which can prevent the system from making automatic adjustments to improve grain quality.

• S650
• S660
• S670
• S680
• S690
• S760
• S770
• S780
• S790

1. 1

   Check the camera lens for dirt or debris that could obstruct the view, and clean the ActiveVision camera lenses to ensure a clear field of view

2. 2

   Inspect the wiring harness and connectors leading to the camera for visible damage, looseness, or corrosion (often located behind a rear panel in the cab on tractors), and check for defective cables

3. 3

   Power cycle the system by cycling the key switch to see if the electronic issue resolves

4. 4

   Check for other active fault codes that might indicate a broader electrical or communication issue

5. 5

   Access the video feed through the machine's display to visually inspect the camera's output, check if the image is blurry or unable to focus, and consult the operator's manual for instructions on how to access video settings and manually adjust the focus

1. 1

   Clean camera lens

   Visually inspect and clean the exterior of the camera lens to ensure a clear field of view.

2. 2

   Inspect wiring and connectors

   Inspect all accessible wiring and connectors between the camera and the Armrest Control Unit (ACU). Repair any defective cables or loose connections.

3. 3

   Power cycle machine

   Attempt to resolve the issue by power cycling the machine using the key switch.

4. 4

   Test manual focus

   If the operator's manual provides a procedure, attempt to manually adjust the camera focus through the display (e.g., via the CommandARM menu) to see if the autofocus mechanism is responsive.

5. 5

   Replace camera

   If the camera remains out of focus and all connections are secure, the camera itself is the most likely point of failure and should be replaced.