John Deere 000084.31 – REU: Missing Wheel Speed Message on CAN Bus

The system is not receiving a wheel speed message from the main control module located at the rear of the cab (Rear Electronic Control Unit or chassis module). This indicates a communication error on the Controller Area Network (CAN bus) where the expected wheel speed data is missing or unavailable. This communication breakdown can affect the proper operation of various machine systems that rely on wheel speed data.

• 5085M
• 5100M
• 5100MH
• 5100ML
• 5115ML
• 6110M
• 6120M
• 6130M
• 6145M
• 6155M
• 6175M
• 6195M
• 6110R
• 6120R
• 6130R
• 6145R
• 6155R
• 6175R
• 6195R
• 6215R

1. 1

   Check for other active or stored error codes, as this fault is often a secondary symptom of a broader CAN bus issue

2. 2

   Perform a 'cold boot' (hard reset) by disconnecting the battery for a period of time to clear temporary communication glitches

3. 3

   Check the CAN bus status on the tractor's diagnostic display for errors such as 'Passive', 'Warn', 'Off', or high 'Bus Utilization'

4. 4

   Inspect the wiring harness and connectors between the wheel speed sensor, the main control module at the rear of the cab, and related ECUs for damage, corrosion, or loose connections (CAN High is yellow, CAN Low is green)

5. 5

   Check the CAN bus network terminating resistors at each end of the network to ensure signal integrity

1. 1

   Address primary fault codes

   Diagnose and resolve any other active fault codes first, as they may be the root cause of the missing CAN bus message.

2. 2

   Repair CAN bus wiring

   If visual inspection reveals damage, corrosion, or loose connections in the CAN bus wiring or connectors, repair or replace the affected components.

3. 3

   Test and replace wheel speed sensor

   If a specific wheel speed sensor is implicated by other fault codes, test the sensor and its circuit. Replace the sensor if it is found to be faulty.

4. 4

   Replace Rear Electronic Control Unit

   If CAN bus errors persist, wiring is intact, and the main control module at the rear of the cab is suspected, replace the module. This replacement typically requires programming by a certified technician.