CLAAS Id76B1h / 76B1h (728) – REH (A58): Error on the rear lifting mode selector

Error on the rear lifting mode selector. When this fault is triggered, the rear lifting function is blocked from the in-cab controls. However, the external lifting controls located on the rear fenders can still be used.

• CLAAS Axion 850–810
• CLAAS Axion 950–920
• CLAAS Arion 640–510
• CLAAS Arion 430–410

1. 1

   Restart the tractor to see if the module resets and clears the fault

2. 2

   Test the external fender controls (S181 / S182) to verify the issue is isolated to the in-cab mode selector

3. 3

   Inspect connectors and harness continuity linking the rear lifting mode selector, the MFA (A100) armrest multifunction module, and the REH (A58) lifting module

4. 4

   Check for any short-circuits or open circuits in the wiring

5. 5

   Check the sources of energy (fuses, 12V supply, and ground) to the REH (A58) and MFA (A100) modules

6. 6

   Check the component's resistance and adjustment values (potentiometer/switch voltages)

1. 1

   Document Codes

   Note all error codes present on the tractor (e.g., via the CEBIS terminal) to see if the mode selector fault is generating secondary codes.

2. 2

   Access the Armrest/Console

   Gain access to the MFA (A100) armrest multifunction module where the rear lifting mode selector is located.

3. 3

   Perform Harness Measurements

   Using a multimeter, test the wiring harness between the mode selector switch/potentiometer and the REH (A58) module (located under the right-hand console).

4. 4

   Replace Faulty Component

   If the wiring and power supplies are intact but the selector signal remains invalid, replace the rear lifting mode selector switch/potentiometer.

5. 5

   Clear and Retest

   Clear all error codes from the system memory, restart the tractor, and test the rear lifting system to ensure the anomaly does not reappear.