Description:

This diagnostic trouble code is generated when there is a data transfer issue between the Cab Control Unit (CCU) control software and the ECU, with messages being intermittently or entirely not received. Possible causes include an open circuit, a short circuit, or faulty CAN Bus terminating resistors in the communication line.

Reaction:

The malfunction may lead to limited or no functionality of the cab control software, affecting climate control, entertainment, and other cab-related functions.

Recommendations:

• Inspect CAN Bus System: Check the CAN Bus for physical and electrical integrity, focusing on connections and segments involving the CCU.
• Resolve Circuit Issues: Identify and repair any open or short circuits in the CAN Bus system.
• Replace Faulty Terminating Resistors: If terminating resistors are found to be defective, replace them to ensure proper signal termination and reflection prevention.
• Test Communication Pathways: After repairs, use diagnostic tools to ensure that messages are being correctly sent and received between the CCU and ECU.
• Reset and Reconfigure Systems: Reset the related control units to implement the repairs and clear any lingering fault codes.

Note:

The integrity of the CAN Bus system is vital for the seamless operation of all interconnected control units. Regular diagnostics and maintenance are recommended to prevent communication errors and ensure the reliability of vehicle electronic systems.