CLAAS 78D4h: CAN Message for Contacts S1 or S2 Not Received or Invalid

The CAN message for Contacts S1 or S2 is not being received by the EXT (A62) external function module, or the received message contains an invalid value.

1. 1

   The communication between the CAN network and the EXT (A62) external function module

2. 2

   The signal integrity of the CAN bus

3. 3

   The functionality of the component sending the CAN message for Contacts S1 or S2

1. 1

   Verify the CAN bus connections

   Check all physical connections related to the CAN bus for the EXT (A62) external function module.

2. 2

   Test the signal transmission

   Use a diagnostic tool to monitor the CAN bus and confirm whether the message for Contacts S1 or S2 is being transmitted correctly.

3. 3

   Inspect the component sending the message

   Check the component responsible for sending the CAN message for Contacts S1 or S2 for proper operation.