John Deere 002167.09 – SCC: SCV 7 CAN Bus Communication Fault

The Selective Control Unit (SCC) has detected a communication breakdown on the CAN bus, specifically a loss of messaging with the number seven Selective Control Valve (SV VII). This interruption in data exchange prevents the proper functioning of the associated hydraulic valve and is typically caused by wiring issues, connector damage, or a failure within the electronic modules.

• 8030 Series Tractors
• 8130
• 8230
• 8330
• 8430
• 8530
• 9R Series
• 9360R
• 9410R
• 9460R
• 9510R
• 9560R
• 6M Series
• 6R Series
• 7R Series

1. 1

   Cycle tractor power to see if the fault clears, which may resolve temporary communication glitches

2. 2

   Check for other active CAN bus or electrical system fault codes to rule out a widespread network problem

3. 3

   Inspect hydraulic oil level, as low fluid can sometimes trigger SCV-related fault codes

4. 4

   Visually inspect the wiring harness and connectors between the SCC and SCV 7 for corrosion, chafing, or loose connections

5. 5

   Verify power and ground at SCV 7 using a multimeter, as power is often supplied in pairs (e.g., SCVs 1 & 2, 3 & 4)

6. 6

   Perform a CAN bus voltage check: CAN High (yellow) and CAN Low (green) should both read approximately 2.5 volts when idle

1. 1

   Address basic issues

   Top off hydraulic oil if low, cycle the tractor power, clear the codes, and monitor the system to see if the fault returns.

2. 2

   Repair wiring and connectors

   Repair or replace any damaged wiring or corroded connectors found during inspection. Ensure all connections are clean and secure, then clear codes and re-test.

3. 3

   Isolate the faulty component

   Swap the electrical portion of SCV 7 with a known good component (like SCV 6). If the fault code changes to a message fault for SCV 6, the SCV 7 control unit is faulty.

4. 4

   Replace faulty components

   Replace the SCV 7 control unit, the wiring harness (if an internal break is found via continuity testing), or the Rear Chassis Controller (SCC) if all other components and wiring verify as good.