Description:

This diagnostic trouble code indicates a data transfer problem between the Automatic Transmission Control (ATC) or Engine Timing Control (ETC) software and the ECU, characterized by intermittent or non-existent reception of CAN messages, likely due to an open circuit, short circuit, or faulty CAN Bus terminating resistors.

Reaction:

The response from the control software may be limited or non-functional, potentially affecting the transmission or engine timing operations.

Recommendations:

• Inspect CAN Bus Network: Check for any physical damage, loose connections, or signs of corrosion that might be affecting the integrity of the CAN Bus network.
• Measure CAN Bus Signal Integrity: Use specialized diagnostic tools to measure and diagnose the signal quality across the CAN Bus to pinpoint disruptions.
• Replace Faulty Terminating Resistors: If the terminating resistors are found to be faulty, replace them to restore proper network function.
• Test Connectivity and Communication: After repairs or adjustments, test the CAN Bus network to ensure robust communication between the ATC/ETC and ECU.
• Reset Systems and Re-test: Reset all affected systems to clear any stored error states and conduct a thorough test to ensure all functionalities are active and error-free.

Note:

Maintaining a stable and robust CAN Bus network is crucial for the seamless integration and communication between various vehicle control units. Regular checks can help prevent connectivity issues.