John Deere 523804.19 – SCO (Front Chassis Module): CAN BUS Message Fault, Front Chassis Module (SCO) / Multi-Function Lever (Potentiometer) Function 2 / Lateral Sensor Fault Message Received

The value of the multi-function lever (specifically function 2 / the lateral sensor) cannot be determined and provided on the CAN Bus by the AIC control software, causing a transmitted replacement value to generate this diagnostic trouble code and disabling the selective control valve (SCV) as a safety reaction.

• 6110R
• 6120R
• 6130R
• 6145R
• 6155R
• 6175R
• 6195R
• 6215R
• 8225R
• 8245R
• 8270R
• 8295R
• 8320R
• 8345R
• 8400R
• 8310RT
• 8335RT
• 8360RT
• 9230
• 9330
• 9430
• 9530
• 9630

1. 1

   Inspect all CAN Bus wiring harnesses leading to the multi-function lever and the SCO module for signs of physical damage, loose connections, pinched wires, or corrosion.

2. 2

   Test the lateral (side-to-side) movement of the multi-function lever to ensure it is not physically binding or damaged.

3. 3

   Use a diagnostic tool to test the CAN Bus network for proper communication to isolate whether the fault is in the lever's internal potentiometer or the wiring harness.

1. 1

   Repair Wiring

   Secure and repair any damaged wiring, loose pins, or corroded connectors found during the visual inspection. Clear the codes and retest.

2. 2

   Recalibrate the Lever

   If the wiring is intact, attempt to recalibrate the multi-function lever using John Deere Service ADVISOR. Sometimes a loss of calibration can trigger a CAN message fault.

3. 3

   Replace the Multi-Function Lever

   If the lever fails calibration or the internal lateral sensor (potentiometer) is dead, the multi-function lever assembly must be replaced.

4. 4

   Clear and Retest

   After installing the new lever, clear the diagnostic trouble codes and verify that the selective control valves (SCVs) function normally.