CLAAS Id765Eh / 765Eh (463) – TR2 (A57-2) Transmission Module: Claas Power Management function faulty due to loss of engine speed information on the Powertrain CAN bus

Claas Power Management function faulty due to loss of engine speed information on the Powertrain CAN bus. When this fault is triggered, the system's default response is to restrict the tractor's performance by automatically selecting the lowest power curve.

• Axion 810
• Axion 820
• Axion 830
• Axion 840
• Axion 850
• Arion 410
• Arion 420
• Arion 430
• Arion 510
• Arion 640

1. 1

   Verify the operational status of the Engine Module (A15), as it is responsible for broadcasting the engine speed signal.

2. 2

   Check the connectors and continuity of the Powertrain CAN bus harnesses linking the A15 Engine Module and the A57-2 TR2 Transmission Module.

3. 3

   Inspect the Powertrain CAN bus network for short-circuits or open circuits, and verify the sources of energy including fuses, power supply, and ground.

4. 4

   Test the 'Auto 5' module using CLAAS diagnostic tool n° 60 05 033 249.

1. 1

   Document Codes

   Note all error codes present on the tractor. Analyze the interaction between them, as a primary CAN bus failure can generate secondary codes like this one.

2. 2

   Inspect Wiring

   Perform physical tests and multimeter measurements on the Powertrain CAN bus wiring between the A15 Engine Module and the TR2 Transmission Module to rule out harness damage.

3. 3

   Test Modules

   Hook up the CLAAS diagnostic system. Use tool n° 60 05 033 249 to test the 'Auto 5' module. If the module fails the diagnostic test, it must be changed.

4. 4

   Clear and Retest

   Once the wiring is repaired or the faulty module is replaced, clear all error codes from the TR2 memory. Test drive the tractor to ensure the anomaly does not reappear and that full power management is restored.