John Deere 002007.09 – VLC: CAN BUS Message Fault in Chassis Module

A fault has been detected in the CAN BUS message communication related to the Vehicle Load Center (VLC), also known as the Chassis Module. The .09 suffix signifies a communication error, indicating that the VLC is either not sending messages, not receiving them, or the messages are corrupted on the Controller Area Network (CAN bus).

• 6110R
• 6120R
• 6130R
• 6145R
• 6155R
• 6175R
• 6195R
• 6215R
• 8130
• 8230
• 8330
• 8430
• 8530
• 8225R
• 8335R
• 9330
• 9430
• 9530
• 9630
• 9360R
• 9560R

1. 1

   Visually inspect the wiring harness and connectors associated with the VLC module for signs of damage, chafing, corrosion, pinched wires, or loose connections.

2. 2

   Check the ground points for the VLC and other modules on the CAN bus to ensure they are clean and tight.

3. 3

   Perform a CAN Bus Resistance Check: With the battery disconnected, measure resistance between Pin C (CAN High) and Pin D (CAN Low) at the 9-pin diagnostic connector. Expected reading is approximately 60 Ohms. 120 Ohms indicates a missing terminator or open circuit; 0 Ohms indicates a short circuit; open-loop indicates a break in wiring or both terminators missing.

4. 4

   Perform a CAN Bus Voltage Check: With the battery reconnected and ignition ON (engine off), measure DC voltage between Pin C and ground (Expected: 2.5V to 3.5V) and Pin D and ground (Expected: 1.5V to 2.5V).

1. 1

   Address resistance and voltage issues

   If resistance reads 120 Ohms, locate and inspect the two terminating resistors and their wiring. If resistance is 0 Ohms or voltages are abnormal, unplug modules from the CAN bus one at a time, re-checking readings after each. The last module disconnected before readings normalize is likely the source of the fault.

2. 2

   Isolate the VLC module

   Locate the VLC module (often at the rear of the tractor). Inspect its connectors for damage, corrosion, or pushed-out pins. With the VLC unplugged, check for continuity and shorts to power or ground on the CAN bus wires leading to the module.

3. 3

   Update software and programming

   If the wiring and the module itself appear to be in good condition, perform a software update or reprogram the control unit using a John Deere service tool.

4. 4

   Replace the VLC module

   If all wiring and connections are confirmed to be good, and the fault persists pointing towards an internal failure, replace the Vehicle Load Center (VLC) module.