John Deere 1533 – RCU: Feeder House Tilt Sensor Voltage Anomaly

The control unit has detected a voltage irregularity from the feeder house tilt sensor (Contour Master angle sensor). This fault is triggered when the sensor's voltage output is inconsistent or outside the expected range (below 0.5 VDC or above 4.5 VDC), or if it reports an illogical sequence such as a higher voltage at the left tilt position compared to the center position. This anomaly negatively impacts the automatic header height and lateral tilt functions.

• STS Series
• WTS Series
• S-Series
• 9570 STS
• 9670 STS
• 9770 STS
• 9870 STS
• S690
• T-Series
• W-Series

1. 1

   Inspect the wiring harness and connectors between the feeder house tilt sensor and the control unit for damage, corrosion, or loose connections. Ensure the harness is securely plugged in.

2. 2

   Check the sensor and its linkage for physical damage, binding, or incorrect installation. The sensor linkage can be adjusted to change the voltage reading.

3. 3

   Access the diagnostics menu on the combine's display to view the live voltage from the tilt sensor to determine if it is out of range or unresponsive to tilt adjustments.

4. 4

   Attempt to recalibrate the sensor, as the system may have lost the learned voltage values for the full left, full right, and center positions.

1. 1

   Prepare the machine

   Park the combine on a hard, level surface. Start the engine and raise the header completely.

2. 2

   Access calibration mode

   On the in-cab display, navigate to the diagnostics and calibration menu. This is typically done by pressing a 'diagnostic switch' and then a 'calibration switch'. Select the feeder house tilt ('tiLt') or Contour Master calibration mode.

3. 3

   Calibrate left tilt

   When prompted to establish the left tilt setting, press and hold the manual tilt switch to rotate the feeder house completely to the left until it stops. Press the calibration button to save this position.

4. 4

   Calibrate right tilt

   When prompted for the right tilt setting, press and hold the manual tilt switch to rotate the feeder house completely to the right. Press the calibration button to save this position.

5. 5

   Calibrate center position

   When prompted for the center or level position, use the manual tilt switch to level the feeder house. A manual indicator on the feeder house can be used as a visual guide to find the approximate level position.

6. 6

   Store calibration

   Once the center position is set, press the calibration button to save it. The display should indicate that the calibration is complete ('EOC'). Press the enter switch to store the values.

7. 7

   Test operation

   After successful calibration, test the automatic and manual tilt functions to ensure they are working correctly. If the fault code reappears or the calibration fails, the sensor or its related components are likely faulty.

8. 8

   Component replacement

   If diagnostics and calibration fail to resolve the issue, replace the faulty component (the sensor itself or the associated linkage). After replacement, the calibration procedure must be performed again.