John Deere 523805.19 – SCO or SCC: Incorrect CAN Bus Message, Information from AIC Control Software / Multi-Function Lever Fore-Aft Sensor Fault Message Received

This code indicates that the value of the multi-function lever (specifically Function 1 / the fore-aft sensor) cannot be determined and provided on the CAN Bus by the AIC (Armrest Interface Control) software. Because the system cannot read the lever's position, a transmitted replacement value generates this diagnostic trouble code. When this fault is detected, the Selective Control Valves (SCVs) will be disabled and will not function.

• 6110R
• 6120R
• 6130R
• 6145R
• 6155R
• 6175R
• 6195R
• 6215R
• 8225R
• 8245R
• 8270R
• 8295R
• 8320R
• 8345R
• 8310RT
• 8335RT
• 8360RT
• 9230
• 9330
• 9430
• 9530
• 9630
• 9470RT
• 9520RT
• 9570RT

1. 1

   Check for Priority Codes: In its active state, this fault can also generate diagnostic trouble codes at the AIC control software. If AIC codes are present, they take priority and should be diagnosed first.

2. 2

   Inspect CAN Bus Wiring: Check all CAN Bus wiring between the multi-function lever, the armrest console, and the SCO module for signs of damage, loose connections, or corrosion.

3. 3

   Verify Multi-Function Lever Operation: Ensure the multi-function lever is not physically jammed or sticking in the fore-aft position.

4. 4

   Test CAN Bus Network: Test the CAN Bus network for proper communication to rule out a broader network failure before condemning the lever itself.

1. 1

   Power Down

   Turn off the tractor and disconnect the battery to prevent electrical shorts while working on the CAN Bus system.

2. 2

   Access the Lever

   Remove the trim panels on the right-hand armrest console to access the base of the multi-function lever.

3. 3

   Inspect Connections

   Disconnect the wiring harness at the base of the multi-function lever. Inspect the connector pins for corrosion, pushed-back pins, or wire chafing. Secure and repair any wiring issues found.

4. 4

   Replace the Lever

   If the wiring and CAN Bus network test fine, the internal potentiometer (fore-aft sensor) inside the multi-function lever has failed. The lever actuator must be replaced. Remove the mounting hardware, swap in the new multi-function lever actuator, and reconnect the harness.

5. 5

   Reassemble and Power Up

   Reinstall the armrest trim and reconnect the battery.

6. 6

   Recalibrate

   Turn the key to the ON position. The new multi-function lever must be recalibrated using the CommandCenter display or John Deere Service ADVISOR.

7. 7

   Test

   Clear the fault codes and test the operation of the Selective Control Valves (SCVs) to ensure full functionality has returned.