Description:

This error code, VLC 002030.06, indicates that the Vehicle Load Center (VLC) control unit has detected that its total circuit load current is above 75 amps. This condition can be caused by additional auxiliary components like an A/C compressor, headlights, window washers, or horn being added to the existing circuits, leading to an overload.

Reaction:

When this fault is detected, the VLC control unit disables individual load devices (e.g., A/C compressor, various headlights, window washer, and horn) to reduce the overall load current. The software executes a systematic shutdown of these devices starting with those over their fuse ratings, in predefined priority order, and those approaching their fuse limits.

Recommendations:

Identify and Resolve Individual High Current Codes:

• Check for and resolve any individual “current high” codes (XXXXXX.06) that may have triggered this overload. Each individual code must be diagnosed and resolved first.

Inspect Added Auxiliary Devices:

• Review any additional auxiliary devices that have been installed. Ensure they do not exceed the designed capacity of the VLC control unit. If necessary, remove or replace devices with lower current alternatives.

Check Wiring and Connections:

• Inspect all wiring and connections for signs of damage, corrosion, or loose connections that could contribute to increased current draw. Repair or replace any compromised wiring.

Measure Circuit Current:

• Use a multimeter to measure the current draw of each circuit to identify which ones are contributing to the high load. Pay particular attention to circuits involving the A/C compressor, headlights, window washer, and horn.

Replace Faulty Components:

• If any component is found to be drawing excessive current, replace it. Components approaching their fuse ratings or causing repeated overloads may be faulty.

Upgrade System Capacity:

• If the vehicle’s electrical system regularly experiences high loads, consider upgrading the capacity of the VLC control unit or distributing the load across additional circuits to prevent overloads.

Consult Technical Support:

• If you are unable to resolve the issue after taking the above steps, contact technical support for further assistance. Provide detailed information about the fault and the diagnostics performed.

Note:

• The software in the VLC control unit automatically manages overloads by shutting down individual drivers to protect the system. It does this in an order based on fuse ratings, predefined priorities, and proximity to fuse limits. This automated process helps prevent damage but requires that root causes of overloads be addressed promptly.
• Regularly monitoring and maintaining the electrical system, especially after adding auxiliary devices, can help prevent such overload situations.