CLAAS Id77E2h / 77E2h (13) – HYD (A60) - Hydraulic Module: The "Instruction" message from valve 4 is not in the right format.

As a safety measure, electrodistributor 4 (Valve 4) is forced to return to its neutral position.

• Axion 800 series
• Axion 810
• Axion 820
• Axion 830
• Axion 840
• Axion 850
• Arion 400 series
• Arion 600 series
• Xerion

1. 1

   Check the Hydraulic CAN bus network for communication stability

2. 2

   Check the connectors and continuity of the harnesses linking the HYD (A60) module to the A105-4 electrodistributor module for short-circuits or open circuits

3. 3

   Check the sources of energy (fuses, power supply, and ground) to the electrodistributor module

4. 4

   Check the compatibility of program versions, settings, and calibration for the hydraulic module

1. 1

   Document & Clear

   Note all error codes present on the tractor to analyze if another code is generating this anomaly.

2. 2

   Inspect Valve 4 (A105-4)

   Locate electrodistributor valve 4 on the rear hydraulic block. Disconnect the harness and inspect the pins for corrosion, pushed-out pins, or moisture ingress.

3. 3

   Test the CAN Lines

   Using a multimeter, test the CAN High and CAN Low lines between the HYD (A60) module and the A105-4 valve for proper resistance (typically 60 ohms across the network) and continuity.

4. 4

   Verify Power

   Ensure the valve is receiving proper operating voltage (12V) and has a solid ground.

5. 5

   Component Replacement

   If the wiring, CAN bus, and power supply are all intact, the internal logic or driver of the A105-4 electrodistributor module has likely failed and is sending malformed instruction messages. Replace the electrodistributor valve.

6. 6

   Recalibrate & Test

   After replacing the valve, clear all error codes, recalibrate the hydraulic valves via the CLAAS diagnostic tool (if required), and operate the tractor to ensure the anomaly does not reappear.