CLAAS Id7714h / 7714h (1568 02) – ENG (A15) Engine Module: Missing or erroneous torque curve selection information on Powertrain CAN bus

The ENG (A15) engine module receives no information from torque curve selection on the Powertrain CAN bus or this information is in error on the Powertrain CAN bus. When this fault is logged, the CLAAS Sequence Management (CSM) becomes inactive and the system defaults to a degraded mode where the lowest power curve is selected automatically.

• CLAAS Axion 850
• CLAAS Axion 840
• CLAAS Axion 830
• CLAAS Axion 820
• CLAAS Axion 810
• CLAAS Arion 640
• CLAAS Arion 630
• CLAAS Arion 620
• CLAAS Arion 610
• CLAAS Arion 510
• CLAAS Arion 430
• CLAAS Arion 410

1. 1

   Verify the physical integrity of the Powertrain CAN bus network

2. 2

   Ensure the TR2 (A57-2) transmission module is communicating and powered

3. 3

   Ensure the engine module ENG (A15) is properly receiving CAN signals

1. 1

   Inspect Wiring and Connectors

   Check the connectors and the continuity of the wiring harnesses linking the ENG (A15) module and the TR2 (A57-2) module along the Powertrain CAN bus.

2. 2

   Test for Shorts/Opens

   Use a multimeter to verify there are no short circuits to ground, short circuits to power, or open circuits on the CAN High and CAN Low lines.

3. 3

   Check Power and Ground

   Verify the energy sources for both the A15 and A57-2 modules. Check all relevant fuses, main power feeds, and ground connections.

4. 4

   Module Diagnostics

   If the wiring harness is intact, use the official diagnostic tool (e.g., tool n° 60 05 033 249 for the 'Auto 5' TR2 module) to test module responsiveness.

5. 5

   Replace Faulty Module

   If either the TR2 (A57-2) or ENG (A15) module fails to communicate during the diagnostic tool test, replace the faulty module and re-flash/calibrate it using CLAAS MetaDiag software.