CLAAS 769Fh – Claas Tr3 A57 3 Transmission Module: Park-Lock Issue in Transmission Module TR3 (A57-3)

The transmission module TR3 (A57-3) does not detect the key’s status change and enters standby mode. This is caused by a problem with the Park-Lock system. The automatic handbrake is invalid, and the Park-Lock is inoperative.

1. 1

   The Park-Lock system for proper operation

2. 2

   The key’s status change detection by the transmission module TR3 (A57-3)

3. 3

   The main switch and its connection to the transmission module TR3 (A57-3)

1. 1

   Turn off the main switch

   Ensure the main switch is fully turned off.

2. 2

   Wait for at least 30 seconds

   Allow the system to reset.

3. 3

   Restart the engine

   Turn the key to the start position and restart the engine.

4. 4

   Engage Park Lock

   Attempt to engage the Park Lock after the engine has restarted.

5. 5

   Check the Park-Lock operation

   Verify if the Park-Lock is now functioning correctly.