John Deere 2145.09 – TID (Direct Drive Gear Shift Module): Incorrect CAN BUS Message, Information from FCC Control Software (FCC Message Missing)

The control software detects a data transfer problem between the TID (Direct Drive Gear Shift Module) and the FCC (Front Console/Chassis Control) software. The CAN bus messages sent from the FCC are being received intermittently or not at all, indicating an open circuit in the CAN bus, a short circuit, or a faulty CAN bus terminating resistor.

• 6110R
• 6120R
• 6130R
• 6145R
• 6155R
• 6175R
• 6195R
• 6215R
• 8225R
• 8245R
• 8270R
• 8295R
• 8320R
• 8335R
• 8345R
• 8370R
• 8400R

1. 1

   Power cycle the tractor by turning off the ignition switch to see if the system recovers and the code clears.

2. 2

   Visually inspect the CAN bus wiring harness between the TID and the FCC for physical damage, chafing, loose connections, or corrosion at the pins.

3. 3

   Test for open or short circuits (exposed wires touching the chassis) in the CAN bus line using a multimeter or diagnostic tool.

4. 4

   Verify CAN bus terminating resistors by disconnecting the batteries and measuring resistance across the CAN High and CAN Low pins (a healthy bus reads ~60 ohms; 120 ohms indicates a missing/faulty resistor; ~40 ohms or lower indicates a short or improper third resistor).

5. 5

   Verify that the FCC and TID control software are updated to the latest versions to rule out software-related communication glitches.

1. 1

   Safely secure the machine

   Park the tractor on level ground, engage the parking brake, and disconnect the battery negative terminal.

2. 2

   Locate the fault

   Based on your multimeter readings, trace the CAN bus harness connecting the Front Console (FCC) to the Direct Drive Gear Shift Module (TID).

3. 3

   Repair Wiring

   If an open or short circuit is found in the harness, repair the damaged section using John Deere approved wiring repair kits, ensuring all wires are properly insulated and shielded.

4. 4

   Replace Terminating Resistor

   If the resistance test failed (e.g., reading 120 ohms) and the wiring is intact, locate the faulty CAN bus terminating resistor on the main harness and replace it.

5. 5

   Reconnect and Test

   Reconnect the battery, turn the key to the ON position, and clear the stored fault codes using a diagnostic tool.

6. 6

   Test Drive

   Start the tractor and shift through the gears to ensure the transmission functions are fully restored and the code does not return.