John Deere 2033.09 – TIA (Tractor Implement Automation) / Cab Module: Incorrect CAN BUS Message, Information from PDU Control Software / CAN Bus Communication Error with BCU

There is a data transfer problem on the CAN Bus. The reception of messages sent by the PDU or BCU is intermittent or non-existent, indicating a potential open circuit, short circuit, or faulty CAN Bus terminating resistors.

• 6110R
• 6120R
• 6130R
• 6145R
• 6155R
• 6175R
• 6195R
• 6215R
• 260E
• 310E
• 460E
• 670G
• 670GP
• 672G
• 672GP
• 744K

1. 1

   Check CAN Bus resistance between pins C and D (CAN High and CAN Low) of the diagnostic connector with the battery disconnected (should be exactly 60 ohms).

2. 2

   Inspect all CAN Bus wiring and connectors between the TIA (Cab Module) and the PDU/BCU for signs of damage, corrosion, or loose pins.

3. 3

   Check for sources of electrical interference affecting the CAN Bus network and ensure all module grounds are tight.

4. 4

   Monitor CAN Bus communication for high error rates or bus utilization issues using John Deere Service ADVISOR.

1. 1

   Disconnect Power

   Disconnect the machine's battery before servicing the electrical system to prevent short circuits.

2. 2

   Locate the Harness

   Trace the CAN Bus harness connecting the Cab Module (TIA) to the Primary Display Unit (PDU) and Body Control Unit (BCU).

3. 3

   Clean and Secure Connectors

   Unplug the harness connectors at the modules. Inspect for pushed-back pins or corrosion. Clean the contacts with electrical contact cleaner, apply dielectric grease, and firmly reconnect them.

4. 4

   Replace Terminating Resistors

   If your diagnostic resistance test yielded 120 ohms or OL, locate the CAN Bus terminating resistors (often found in the roof panel or behind the instrument panel on tractors) and replace the faulty resistor.

5. 5

   Repair Harness

   Repair or replace any chafed, pinched, or damaged sections of the CAN Bus wiring harness.

6. 6

   Restore Power

   Reconnect the battery.

7. 7

   Update Software

   Connect John Deere Service ADVISOR and ensure that the TIA, PTA, and PDU control software are updated to the latest versions provided by the manufacturer.

8. 8

   Clear and Test

   Clear the 002033.09 diagnostic trouble code and test operate the machine to verify that communication is restored and body control functions operate normally.