John Deere 523343.19 – SCC / SCO: Incorrect CAN Bus Message, Information from AIC Control Software

The value of the multi-function lever (specifically function 3 / the trigger switch) cannot be determined and provided on the CAN Bus by the AIC (Armrest Interface Control) software. Because the system cannot read the actual position of the switch, a transmitted replacement value generates this diagnostic trouble code. When this fault is active, the selective control valves (SCVs) linked to the lever will be disabled and will not function.

• 6110R
• 6120R
• 6130R
• 6145R
• 6155R
• 6175R
• 6195R
• 6215R
• 8225R
• 8245R
• 8270R
• 8295R
• 8320R
• 8335R
• 8345R
• 8370R
• 8400R
• 9470RT
• 9520RT
• 9570RT
• 6M Series
• 7R Series
• 9R Series

1. 1

   Check for Priority Codes: Look for active AIC codes (e.g., AIC 521409.02 or AIC 521412.02) which take priority and indicate exactly which switch circuit failed.

2. 2

   Inspect CAN Bus and LIN Bus Wiring: Check all wiring connecting the Armrest Multi-Function Lever to the AIC and SCC modules for physical damage, loose connector pins, or corrosion.

3. 3

   Verify Multi-Function Lever Operation: Ensure the lever and its trigger switch are physically intact, not binding, and functioning correctly.

4. 4

   Test the CAN Bus Network: Verify proper communication to ensure the AIC is successfully broadcasting to the SCC.

1. 1

   Power Down

   Turn off the tractor, remove the key, and access the armrest control console.

2. 2

   Wiring Repair

   Secure and repair any damaged CAN/LIN bus wiring or loose connections found during the diagnostic inspection.

3. 3

   Recalibration

   If the wiring is intact, attempt to recalibrate the multi-function lever via the CommandCenter display.

4. 4

   Component Replacement

   If calibration fails, or if the trigger switch is physically broken or internally shorted, replace the multi-function lever actuator or the armrest multi-function lever controller.

5. 5

   System Reset

   Reassemble the armrest, turn the key switch to cycle power, and clear the stored SCC/SCO/AIC codes.

6. 6

   Operational Test

   Perform a comprehensive test of the SCVs using the multi-function lever to verify that the CAN Bus message fault does not return and hydraulic functions are restored.