CLAAS 7691h – Claas Tr3 A57 3 Transmission Module: Open Circuit on the Automatic Hand Brake Disengaging Solenoid Valve

An open circuit has been detected on the automatic hand brake disengaging solenoid valve. This prevents the automatic hand brake from being disengaged. The issue may be due to a fault in the solenoid valve supply harness or the solenoid valve winding.

1. 1

   The solenoid valve supply harness (Y324)

2. 2

   The resistance of the solenoid valve winding (Y324)

3. 3

   The ‘Auto 5’ module using tool n° 60 05 033 249

1. 1

   Check the solenoid valve supply harness (Y324) for an open circuit.

   Inspect the wiring for damage, disconnection, or corrosion.

2. 2

   Measure the resistance of the solenoid valve winding (Y324).

   Use a multimeter to check for continuity and proper resistance values.

3. 3

   Test the ‘Auto 5’ module using tool n° 60 05 033 249.

   Follow the manufacturer’s procedure to verify the module’s functionality.

4. 4

   Replace the solenoid valve or the ‘Auto 5’ module if a fault is identified.

   Use the appropriate tools and follow the service manual for installation.