John Deere 2172.09 – SCO: CAN Bus Message Cannot Be Received, Information from E-SCV XII

There is a data transfer problem between the SCO control software and the Electronic Selective Control Valve 12 (E-SCV XII). The controller is expecting a status message from the E-SCV XII on the CAN Bus network, but the message is missing, suggesting a failure in the CAN Bus wiring, a loss of power to the valve, or a failure of the transmitting control software inside the valve's stepper motor. When this fault is active, the control software will limit or completely disable the functionality of E-SCV XII.

• 6110R
• 6120R
• 6130R
• 6145R
• 6155R
• 6175R
• 6195R
• 6215R
• 6R Series
• 8R Series
• 8RT Series
• 8RX Series
• 8245R
• 8400R
• 6M Series
• 6090M
• 6100M
• 6110M
• 6120M

1. 1

   Inspect all CAN Bus wiring harnesses running between the SCO (Front Chassis Module) and the E-SCV XII for signs of physical damage, chafing, loose connections, or corrosion.

2. 2

   Verify that the E-SCV XII stepper motor is receiving proper supply voltage (typically a minimum of 9V is required; low voltage will cause the module to drop off the CAN network).

3. 3

   Use a multimeter or oscilloscope to test the CAN High and CAN Low lines at the E-SCV XII connector to ensure network integrity.

4. 4

   Gently wiggle the wiring harness while monitoring the live data on a diagnostic tool (like John Deere Service ADVISOR) to see if the connection drops.

1. 1

   Repair Wiring

   If any shorts, breaks, or corroded pins were found during the diagnostic checks, repair the wiring harness or replace the damaged connector pigtail. Clean and securely reconnect the harness to the E-SCV XII.

2. 2

   Recalibrate the Control Unit

   If the wiring is intact, connect the tractor to John Deere Service ADVISOR and attempt to recalibrate the E-SCV XII control unit.

3. 3

   Replace the E-SCV XII Stepper Motor/Valve

   If the E-SCV XII unit fails to recalibrate, is completely unresponsive to CAN pings, or has an internal software/hardware failure, the E-SCV XII stepper motor (or the entire valve slice, depending on the exact hydraulic block design) must be replaced.

4. 4

   Clear Codes and Test

   After replacing the component, clear the 002172.09 fault code from the SCO module. Cycle the tractor's key, warm up the hydraulic oil, and test the SCV 12 lever/controls to ensure full functionality has returned.