John Deere 002168.09 – SCC: SCV 8 CAN Bus Communication Failure

A communication failure has occurred on the CAN bus involving the number 8 Selective Control Valve (SCV). The SCV CAN Controller (SCC) is not receiving the expected messages from the SCV due to an abnormal update rate, resulting in a loss of communication with the electronic valve responsible for controlling its specific hydraulic function.

• 9R Series
• 9RT Series
• 6R Series

1. 1

   Restart the tractor to see if the fault clears on initial reset

2. 2

   Check for other SCV-related codes to determine if there is a broader power, ground, or CAN bus issue affecting multiple valves

3. 3

   Check for 12V power (red wire) and a solid ground connection (black wire) at the connector for SCV 8

4. 4

   Visually inspect the wiring harness connectors for SCV 8 and any intermediate connectors to the Rear Chassis Controller for corrosion, pushed-out pins, or damage

5. 5

   Check continuity of the wiring harness from the SCV connector back to the main frame connector, and from the frame connector to the middle connector of the Rear Chassis Controller

6. 6

   Check the overall health of the CAN bus by measuring resistance between the CAN High (yellow) and CAN Low (green) wires (should be approximately 60 Ohms on a healthy system)

1. 1

   Confirm the fault

   Verify that the fault code SCC 002168.09 is active when trying to operate SCV 8.

2. 2

   Inspect and clean connectors

   Disconnect the electrical connector at SCV 8 and any related harness connectors. Thoroughly inspect for corrosion or damage and clean if necessary.

3. 3

   Test and repair wiring

   If no power is found at the SCV 8 connector and connectors appear good, test the continuity of the power and ground wires in the harness. If a lack of continuity is found in the chassis harness, run a new wire or replace the harness section.

4. 4

   Add temporary ground

   If multiple or all SCVs are cutting out (widespread failure cause), add a new ground wire from the SCV connector to a clean point on the tractor's frame. If this resolves the issue, it points to a grounding problem in the main harness.

5. 5

   Isolate the faulty component

   If the wiring appears to be in good condition, swap components with a known good SCV to isolate whether the issue lies with the electronic controller on the SCV itself or the main SCC.

6. 6

   Replace faulty parts

   Replace the wiring harness, the SCV assembly (if internal electronics failed), or the Rear Chassis Controller (SCC) based on the results of the isolation testing.