CLAAS 769Fh: Park-Lock Issue with Transmission Module TR3 (A57-3)

The transmission module TR3 (A57-3) does not detect the key's status change and enters standby mode. This results in the Park-Lock being inoperative and the automatic handbrake being invalid. The fault code appears upon ignition off after Park-Lock codes.

1. 1

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

2. 2

   The Park-Lock functionality and its connection to the transmission module TR3 (A57-3)

3. 3

   The main switch and its impact on 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 after the main switch is turned off.

3. 3

   Restart the engine

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