John Deere 002139.09 – TIQ: CAN Bus Message Fault in TIQ

Fault code 002139.09 indicates a communication failure on the Controller Area Network (CAN bus) originating from the Transmission Intelligence Controller (TIQ). Other control units on the vehicle are not receiving expected data messages from the primary transmission controller, which is responsible for managing transmission functions and communicating its status to other vehicle systems.

• 6R Series
• 7R Series
• 8R Series
• 6110M
• 6120M
• 6130M
• 6145M
• 6155M
• 6175M
• 6195M
• 6090MC
• 6090RC
• 6100MC
• 6100RC
• 6110MC
• 6110RC

1. 1

   Visually inspect the wiring harnesses connected to the transmission controller (TIQ) for physical damage, chafing, pinching, or rodent damage

2. 2

   Check all related connectors for corrosion, moisture intrusion, or pushed-out pins, especially those located under the cab or near the engine

3. 3

   Verify the battery is fully charged and that all battery and ground connections are clean and tight (low voltage causes intermittent communication issues)

4. 4

   Check for any blown fuses related to the transmission controller or other electronic modules

5. 5

   Perform a CAN Bus integrity check (key off, battery disconnected): measure resistance between CAN High and CAN Low at a known good connector, such as the diagnostic port (should be approx. 60 Ohms; 120 Ohms indicates an open circuit/missing resistor, while significantly lower indicates a short circuit between the CAN wires or a faulty controller)

6. 6

   Perform a CAN Bus voltage check (key on): measure voltage of CAN lines relative to chassis ground (CAN High should be 2.5-3.5V, CAN Low should be 1.5-2.5V). Voltages outside of these ranges can indicate a short to power or ground in the wiring or a failure within a control module.

1. 1

   Address immediate electrical findings

   If initial diagnostic checks reveal damaged wiring, corroded connectors, or incorrect CAN bus resistance/voltage, repair damaged wires and clean or replace faulty connectors to restore CAN bus electrical integrity.

2. 2

   Isolate the faulty module

   If wiring is intact, disconnect other control modules from the CAN bus one at a time. If communication with the TIQ module is restored after disconnecting a specific module, that module is likely causing network interference.

3. 3

   Check for software updates

   Have a certified John Deere technician utilize the Service ADVISOR tool to check for and apply any available software updates for the affected controllers.

4. 4

   Replace the TIQ module

   If all other diagnostic steps have been exhausted and the fault points to an internal failure, replace the TIQ module. The new module will require programming by a dealer to ensure compatibility with the specific vehicle's configuration.