CLAAS Id787Fh / 787Fh – MFT (A30) - Cebis terminal module: The Cebis terminal no longer emits messages over the CLAAS vehicle CAN bus

The terminal is experiencing excessive data frame errors, so it shuts down its transmission on the network to prevent corrupting other modules, which can cause associated functions to become inactive or force the machine into a degraded operating mode.

• Arion 500 series
• Arion 600 series
• Arion 510
• Arion 530
• Arion 540
• Arion 550
• Arion 610
• Arion 620
• Arion 640
• Arion 650
• Axion 800 series
• Axion 900 series
• Axion 810
• Axion 850
• Axion 920
• Axion 950
• Axion 960
• Lexion 500 series
• Lexion 600 series
• Lexion 560R
• Lexion 570
• Lexion 580R
• Lexion 590R
• Lexion 600
• Jaguar 900 series
• Jaguar 930-990

1. 1

   Check the CLAAS vehicle CAN bus network wiring harness for physical damage, open circuits, or short-circuits to ground or 12V

2. 2

   Verify the power supply, ground connections, and fuses leading to the Cebis terminal module (MFT A30)

3. 3

   Check for related codes (such as Id7700h or Id7701h) which indicate a short-circuit to the ground on the CAN bus or a failure of the BDG (A103) communication module

4. 4

   Verify the compatibility of the program versions, settings, and calibration of the Cebis terminal

1. 1

   Connect Diagnostic Tool

   Hook up the CLAAS Diagnostic System (CDS) / METADIAG to the machine to confirm Id787Fh is active and to check for other module communication errors.

2. 2

   Isolate the CAN Bus

   Disconnect the Cebis terminal (MFT A30) and test the CAN bus resistance at the connector (with the battery disconnected). A healthy CAN bus should read approximately 60 ohms across CAN High and CAN Low.

3. 3

   Inspect Wiring

   If resistance is out of spec, trace the CAN lines from the Cebis terminal to the main harness, looking for chafed wires or corroded pins. Repair any damaged wiring.

4. 4

   Test Power and Ground

   Turn the key ON and verify that the Cebis terminal is receiving proper 12V operating voltage and has a clean ground.

5. 5

   Replace the Terminal

   If the wiring, power, and ground are all within specification, the internal CAN transceiver inside the Cebis terminal module (MFT A30) has failed. The terminal must be replaced or sent out for board-level repair.

6. 6

   Clear Codes

   After replacing the terminal or repairing the wiring, use the CDS tool to clear the error codes and verify that the Cebis terminal is successfully communicating on the network again.