Description:

This diagnostic trouble code (DTC), SSU 000639.12, is generated when the control unit receives too many incorrect CAN BUS messages or detects a general problem in the connection to the vehicle CAN BUS. This indicates a communication issue with a high error rate on the CAN BUS network.

Reaction:

When this error is detected, the equipment may experience communication delays or failures, leading to reduced functionality or incorrect operation of systems dependent on CAN BUS communication.

Recommendations:

Verify CAN BUS Integrity:

• Inspect the CAN BUS wiring and connectors for any signs of damage, loose connections, or corrosion.
• Use diagnostic tools to check for continuity and proper voltage levels in the CAN BUS lines.

Check for Interference:

• Ensure that there are no sources of electrical interference near the CAN BUS wiring that could be causing errors.
• Check for proper shielding and grounding of the CAN BUS network.

Update Software:

• Ensure that all related system software is up-to-date. Apply any available firmware updates to improve CAN BUS communication protocols.

Replace Faulty Components:

• If any components within the CAN BUS network are found to be defective, replace them with new, genuine parts.

Consult Technical Support:

• If the error persists after performing the above steps, consult technical support or the manufacturer for further assistance in identifying and resolving the issue.

Note:

• Regular maintenance and inspection of the CAN BUS wiring and connected components can help prevent high error rates.
• Keeping the system firmware up-to-date ensures compatibility and reliability of the vehicle’s communication systems.