John Deere 2168.09 – SCC: SV VIII Message Missing

This is a communication error indicating that the control module is not receiving the expected CAN bus data messages from the Selective Control Valve 8 (SCV 8 / SV VIII) electronic control unit. This is typically caused by a wiring issue, a faulty CAN bus terminator, a loss of power/ground to the SCV 8 module, or an internal failure of the SCV 8 electronic control unit itself.

• 6110R
• 6120R
• 6130R
• 6145R
• 6155R
• 6175R
• 6195R
• 6215R
• 8235R
• 8260R
• 8285R
• 8310R
• 8335R
• 8360R
• 8310RT
• 8335RT
• 8360RT
• 9370R
• 9420R
• 9470R
• 9520R
• 9570R
• 9620R
• 9470RT
• 9520RT
• 9570RT

1. 1

   Power cycle the tractor's key switch to see if the communication fault is a temporary glitch that clears upon reboot.

2. 2

   Check for global power codes (e.g., SCC 000158.04 or SCC 000168.04) to verify if the SCC itself has low voltage or a blown fuse, which could cause multiple SCVs to drop offline.

3. 3

   Inspect the wiring harness and connectors leading to the SCV 8 valve slice at the rear hydraulic stack for pinched wires, rubbed-through insulation, or debris/moisture inside the connector.

4. 4

   Using a multimeter, verify that the SCV 8 module is receiving proper unswitched/switched supply voltage and has a clean ground.

5. 5

   Test the CAN High and CAN Low pins for continuity back to the SCC and ensure there are no shorts to ground or power.

1. 1

   Isolate Power

   Turn off the tractor and engage the battery disconnect switch to prevent electrical spikes.

2. 2

   Access the SCV Stack

   Locate the SCV 8 valve slice at the rear hydraulic stack.

3. 3

   Disconnect and Clean

   Unplug the electrical harness connector at the SCV 8 Electronic Control Unit. Inspect for pushed-out pins or corrosion. Clean the contacts with electrical contact cleaner and apply dielectric grease.

4. 4

   Harness Repair (If Applicable)

   If the diagnostic checks revealed a broken CAN wire or power wire, repair the harness using OEM-approved splicing methods or replace the SCV wiring harness section.

5. 5

   Replace the SCV ECU

   If wiring, power, and ground are all verified as good, the SCV 8 Electronic Control Unit has failed internally. Unbolt the electronic control unit/pilot valve from the mechanical valve slice and install the replacement unit.

6. 6

   Reassembly and Calibration

   Reconnect the harness and restore battery power. Connect John Deere Service ADVISOR to clear the SCC 002168.09 fault code. You may need to run an SCV configuration/calibration procedure so the SCC recognizes the new SCV 8 module on the CAN bus network.