CLAAS 7688h: Fault in the rear PTO speed sensor or related components

The fault code indicates an issue related to the rear PTO speed sensor, the rear PTO clutch, the engine speed, the Powertrain CAN bus network, or the 'Auto 5' module. The exact cause requires further inspection of these components.

1. 1

   The rear PTO speed sensor (B142)

2. 2

   The rear PTO clutch

3. 3

   The engine speed

1. 1

   Inspect

   Check the rear PTO speed sensor (B142) for damage or misalignment.

2. 2

   Test

   Verify the operation of the rear PTO clutch and its connection to the system.

3. 3

   Diagnose

   Check the engine speed for consistency and proper signal transmission.