Deutz-Fahr 0: Data Stream Defect in Working Area 2

The system has detected that the data stream in working area 2 is defective, indicating a potential issue with the data transmission or processing in this specific area. This is a generic indication of a CAN bus communication error, meaning messages between electronic control units (ECUs) are lost, corrupted, or not being received. This failure can lead to a loss of communication with specific modules (such as the engine, transmission, or instrument panel), intermittent machine function failures, or a 'bus-off' state where a module stops communicating to protect the network.

• 5 Series Tractors
• 6 Series Tractors
• 7 Series Tractors
• 8 Series Tractors
• 9 Series Tractors
• Models with EMR3 engines
• Models with EMR4 engines
• Models with newer engine management systems
• Combines with Deutz engines
• Telehandlers with Deutz engines

1. 1

   Use a reliable diagnostic tool like Deutz SerDia to read all active and stored fault codes from all ECUs to find a more specific SPN/FMI code related to the CAN communication.

2. 2

   Thoroughly inspect the wiring harnesses, connectors, and CAN bus routing for physical damage, chafing, corrosion, pinched wires, or loose connections. Pay close attention to areas where harnesses pass through bulkheads or are exposed to movement and vibration.

3. 3

   With all modules unpowered, measure the resistance between the CAN High (CAN_H) and CAN Low (CAN_L) wires (a healthy network should read approximately 60 Ohms).

4. 4

   With power off, measure the resistance from CAN_H and CAN_L to chassis ground and power supply to check for short circuits (should read mega-ohms).

5. 5

   With the system powered on and idle, measure the DC voltage of the CAN lines relative to ground (CAN_H should be 2.5V-3.0V, CAN_L should be 2.0V-2.5V).

6. 6

   Isolate the faulty component: If a physical fault is not immediately apparent, disconnect one ECU from the CAN bus at a time and re-test the network. Start with the most likely or accessible modules. When the fault disappears, that module or its stub harness is the likely culprit.

1. 1

   Repair wiring

   If damaged wiring or corroded connectors are found, repair or replace them. Ensure all connections are secure and protected from the elements.

2. 2

   Replace faulty module

   If a specific ECU is identified as faulty (e.g., by causing incorrect bus resistance or voltage even when wiring is good), it will need to be replaced. A replacement ECU will often require programming or configuration using specialized dealer tools like Deutz SerDia.

3. 3

   Replace termination resistor

   If a termination resistor is found to be missing or faulty, install a new 120-Ohm resistor at the correct location on the network.

4. 4

   Clear faults and re-test

   After any repair, clear all diagnostic trouble codes, operate the machine, and re-check for faults to confirm the repair was successful.