John Deere 523828.14 – SCO / SIC: CAN BUS communication failure involving the electronic selective control valves (E-SCV / EICV)

Indicates a data transfer problem between the SCO control software and E-SCV XII, or an incorrect CAN BUS message from the SIC to the M13 Stepper Motor EICV 2. The stepper motor intermittently cannot establish a connection to the control unit via the CAN BUS.

• 6110R
• 6120R
• 6130R
• 6145R
• 6155R
• 6175R
• 6195R
• 6215R
• 6230
• 6330
• 6430

1. 1

   Inspect the CAN BUS wiring harness and connectors between the SCO/SIC control unit and the E-SCV XII / EICV 2 stepper motor for physical damage, chafing, wear, or loose pins

2. 2

   Use John Deere Service ADVISOR or equivalent diagnostic equipment to monitor the CAN BUS network for intermittent data drops or errors

3. 3

   Verify the transmitting control software to ensure the control unit firmware is up to date, ruling out a software glitch

4. 4

   Verify that the SCO/SIC control unit is functioning correctly and processing CAN BUS messages properly

1. 1

   Secure Connections

   Disconnect, clean, and securely reconnect the wiring harness connectors at both the control unit and the E-SCV XII valve to rule out a loose wire or intermittent contact.

2. 2

   Repair Wiring

   If the diagnostic checks reveal damaged CAN BUS wiring, repair or replace the affected section of the wiring harness.

3. 3

   Update Software

   Flash/update the SCO/SIC control unit with the latest firmware to resolve any known software-related transmission issues.

4. 4

   Component Replacement

   If wiring and software are confirmed good but the communication problem persists, the control unit itself may be failing. Note: Do not immediately replace the E-SCV stepper motor, as OEM documentation states the motor itself is not the root cause of this specific CAN BUS code.