CLAAS Id762Eh / 762Eh (415) – TR2 (A57-2): Loss of the theoretical forward speed on the Powertrain CAN bus information although the gearbox intermediate speed information (on Revershift output) is present on Powertrain CAN bus

The transmission control system is receiving intermediate speed data from the Revershift output, but the calculated (theoretical) forward speed data is missing from the Powertrain CAN bus network. When this fault occurs, an audio warning is triggered, but an "ISC" reset is not requested.

• CLAAS Axion 800 series (e.g., 810, 850)
• CLAAS Axion 900 series (e.g., 920, 950)
• CLAAS Arion 400 series (e.g., 410, 430)
• CLAAS Arion 600 series (e.g., 610, 630, 640)

1. 1

   Check the instrument panel module DBD (A101)

2. 2

   Check the status of the crawler range

3. 3

   Check the status of the range module

4. 4

   Check the Powertrain CAN bus network for communication errors

5. 5

   Check the "Auto 5" module using the official CLAAS diagnostic tool

1. 1

   Verify CAN Bus Communication

   Inspect the Powertrain CAN bus network wiring and connections between the TR2 (A57-2) transmission module and the rest of the tractor's network. Look for shorts, open circuits, or frame errors.

2. 2

   Inspect the Instrument Panel Module

   Verify that the DBD (A101) instrument panel module is functioning correctly and communicating on the CAN bus, as it is a primary check for this code.

3. 3

   Verify Range Status

   Use the tractor's diagnostic interface to check the live status of the crawler range and the range module to ensure they are transmitting valid data.

4. 4

   Test the Auto 5 Module

   Connect the specific CLAAS "Auto 5" control unit test tool (Tool No. 60 0503 324 9) to evaluate the Auto 5 module.

5. 5

   Replace Faulty Components

   If the Auto 5 module fails the diagnostic test, or if the TR2 (A57-2) module is found to be internally defective and failing to process the CAN bus speed signals, replace the faulty module.