John Deere 002006.09 – ECU: CAN BUS Message Fault in Cab Module (TIQ)

A fault has been detected in the CAN BUS message communication related to the Cab Module (TIQ). The Engine Control Unit (ECU) has not received an expected message from Source Address 6 in a timely manner, indicated by the '.09' abnormal update rate. This loss of communication points to an issue with the transmission or reception of messages within the cab module's network, which can result in the machine failing to start or move, alongside illuminated dashboard warning lights.

• 5075E
• 6110M
• 6120M
• 6130M
• 7200R
• 7215R
• 7230R
• 7260R
• 7280R
• 8245R
• 8310RT
• 8335RT
• 8360RT
• 8400R
• 9470RT
• 9520RT
• 9570RT
• Diesel Engines with Level 23 ECU

1. 1

   Visually inspect wiring harnesses and connectors for the cab controllers, transmission controller, and ECU for physical damage, corrosion, moisture, or loose connections

2. 2

   Verify that all fuses related to the cab, dash, and electronic control units are intact

3. 3

   Check the main battery ground connection to the frame and cab/control unit grounds using a multimeter (resistance should be close to 0 ohms)

4. 4

   Measure CAN bus resistance between CAN_H and CAN_L at the diagnostic connector with the battery disconnected (should be approximately 60 ohms; 120 ohms indicates an open circuit/missing resistor, while significantly lower indicates a short)

5. 5

   Cycle power by turning the machine off, waiting, and restarting, or disconnect the battery for a few minutes to reset electronic modules

1. 1

   Confirm active faults

   Use a diagnostic scanner to confirm 002006.09 is active and note any other CAN bus-related codes to help pinpoint the location.

2. 2

   Perform Preliminary Checks

   Complete all the diagnostic checks listed in the section above (visual inspection, fuses, grounds, and CAN resistance).

3. 3

   Isolate the faulty module

   If CAN bus resistance is incorrect, unplug controllers one at a time and re-check resistance. If the reading returns to normal (60 ohms) when a specific module is disconnected, that module or its immediate wiring is faulty.

4. 4

   Check CAN voltage

   With power on but the network idle, check DC voltage from CAN_H to ground and CAN_L to ground. Both should be between 2.0 and 4.0 volts (typically 2.5V). Voltages outside this range indicate a faulty transceiver in one of the modules.

5. 5

   Repair wiring

   If a damaged wire or corroded connector is found during isolation, repair or replace it, ensuring connections are secure and protected from elements.

6. 6

   Replace the faulty module

   If the Cab Module (TIQ) or another specific controller is identified as the source of the fault, replace it. Program the new module with John Deere Service ADVISOR software if required.

7. 7

   Clear codes and verify

   Clear all diagnostic trouble codes and operate the machine to ensure the fault code does not reappear.