CLAAS Id77CDh / 77CDh (13) – HYD (A60) - Hydraulic Module: Instruction message from valve 3 is not in the right format

The "Instruction" message from valve 3 is not in the right format, causing electrodistributor 3 (Valve 3) to automatically return to neutral as a safety response.

• Axion 800 series
• Axion 810
• Axion 820
• Axion 830
• Axion 840
• Axion 850

1. 1

   Check the Hydraulic CAN bus network for integrity

2. 2

   Check the connectors and continuity of the harnesses linking the HYD (A60) module and the electrodistributor module (A105-3)

3. 3

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

4. 4

   Check the sources of energy (fuses, power supply voltage, and ground connections) for the electrodistributor module

5. 5

   Check the compatibility of program versions, settings, and calibration between the modules

1. 1

   Document Codes

   Note all error codes present on the tractor to analyze any interaction (as one error code can generate another).

2. 2

   Inspect Harness

   Physically inspect the wiring harness running to Valve 3 (Electrodistributor A105-3) and the HYD A60 module. Look for chafed wires, bent pins, or corrosion in the connectors.

3. 3

   Test Voltages

   Using a multimeter, verify that the electrodistributor module is receiving the correct operating voltage and has a solid ground.

4. 4

   Test CAN Communication

   Verify the CAN bus lines for proper resistance and voltage to ensure messages can be formatted and sent correctly.

5. 5

   Replace Component

   If the wiring, power, and software calibrations are all correct, the fault lies within the hardware. Replace the faulty component (most likely the Electrodistributor module A105-3, or in rarer cases, the HYD A60 module).

6. 6

   Clear & Retest

   Clear all error codes from the system, then operate the tractor's hydraulic functions to ensure the anomaly does not appear again.