John Deere 3841.01 – XMC / XSC: Wheel Angle Sensor Channel 1, Voltage Too Low

The control unit is registering a voltage below 0.5 volts at Channel 1 of the front axle wheel angle sensor. This indicates a potential hardware issue with the sensor itself or a fault in its wiring circuit, causing the control software to exhibit limited or no functionality and directly affecting the AutoTrac and wheel angle sensing systems.

• 6110M
• 6120M
• 6130M
• 6145M
• 6155M
• 6175M
• 6195M
• 6110R
• 6120R
• 6130R
• 6145R
• 6155R
• 6175R
• 6195R
• 6215R
• 6145J
• 6165J
• 6180J
• 6205J
• 8225R
• 8235R
• 8245R
• 8260R
• 8270R
• 8285R
• 8295R
• 8310R
• 8320R
• 8335R
• 8360R
• 8400R
• 7R Series Tractors
• John Deere Sprayers
• John Deere Combines

1. 1

   Visually inspect the wheel angle sensor on the front axle for any signs of physical damage or wear, ensuring it is properly installed and securely connected.

2. 2

   Inspect the wiring harness and connectors associated with the wheel angle sensor for damage, corrosion, or loose connections that could cause a voltage drop below the 0.5V threshold.

3. 3

   Connect John Deere Service ADVISOR to monitor the voltage levels of the sensor in real-time to identify and correct any deviations from the normal operating range.

4. 4

   Check for and install any available updates for the XMC/XSC control software to address potential bugs or signal processing issues.

1. 1

   Power Down

   Turn off the machine and disconnect the battery to prevent electrical shorts during service.

2. 2

   Repair Wiring

   If the diagnostic checks revealed damaged wiring or corroded connector pins at the sensor harness, repair or replace the affected wiring.

3. 3

   Replace Sensor

   If the wiring is intact but Channel 1 voltage remains too low, remove the defective wheel angle sensor from the steering linkage/axle housing. Install the new sensor and secure the mounting hardware.

4. 4

   Reassemble

   Reconnect the sensor wiring harness, ensuring the connector is fully seated and locked.

5. 5

   Clear Codes & Calibrate

   Reconnect the battery. Use the diagnostic tool to delete the XMC/XSC 003841.01 diagnostic trouble code.

6. 6

   System Calibration

   You must execute the steering system and wheel angle sensor configurations and calibrations as outlined in the service manual before returning the tractor to the field.