John Deere 524015.09 – SCC: Missing SV III (Selective Control Valve III) External Control Message for 1 Second.

The controller is not receiving the required external control data/message for Selective Control Valve (SCV) III over the CAN bus network for longer than 1 second. This communication breakdown typically happens between the SCV control lever, the Armrest Control Unit (ACU), and the SCC, causing the system to default to a Function Degraded state.

• 6110R
• 6120R
• 6130R
• 6145R
• 6155R
• 6175R
• 6195R
• 6215R
• 7720
• 7820
• 7920
• 8130
• 8230
• 8330
• 8430
• 8530
• 8235R to 8400R
• 8310RT
• 8335RT
• 8360RT
• 9230
• 9330
• 9430
• 9530
• 9630

1. 1

   Restart the tractor to verify if the active code reappears, as transient CAN bus interruptions can often be corrected via a key cycle.

2. 2

   Check the power supply by visually inspecting the batteries and alternator for signs of damage, loose connections, or accumulated debris. Low voltage can cause modules to drop off the CAN network.

3. 3

   Inspect external controls that interface with the SCV system, such as the Resume Switch, iTEC sequence switches, or any attached implement connections that might be interrupting the CAN network.

4. 4

   Check the CommandCenter display to see if the single lever control or specific SCV settings have been altered or disabled.

1. 1

   Acknowledge and Clear

   If the code clears after a restart, acknowledge the alert on the CommandCenter to return the display to normal mode. No further repair is immediately necessary, though the code may be stored in history.

2. 2

   Inspect the CAN Bus Harness

   If the code is active and hard-set, access the wiring harness connecting the SCV III Control Lever (Sensor R702) to the Armrest Control Unit (ACU) and the SCC. Look for chafed wires, pinched harnesses in the armrest pivot, or loose connector pins.

3. 3

   Test the SCV III Control Lever Sensor

   Test the lever sensor (R702) for proper voltage and resistance. If the sensor is failing to send its position data to the ACU, the SCC will flag the missing message.

4. 4

   Check CAN Terminating Resistors

   Verify the integrity of the CAN bus circuit by measuring the resistance across the CAN High and CAN Low pins (should be approximately 60 ohms with the battery disconnected).

5. 5

   Software/Module Update

   If the wiring and lever sensor are intact, the issue may be software corruption or a hardware failure within the ACU or SCC. Have a John Deere dealer re-flash the SCC/ACU software or replace the faulty module.