Description:

This error code, VLC 001542.04, indicates that the Vehicle Load Center (VLC) control unit has detected that the wake-up voltage from the Cab Load Center (CLC) control unit is low. The wake-up voltage should be within the range of 12.5 to 14.5 volts.

Reaction:

When this fault is detected, the VLC control unit’s functions may be limited due to inadequate wake-up voltage, affecting the overall performance of the vehicle’s electrical systems.

Recommendations:

Check Battery Voltage:

• Measure the battery voltage to ensure it is within the 12.5 to 14.5 volts range. Replace or recharge the battery if the voltage is low.

Inspect Wiring and Connections:

• Examine the wiring and connections between the CLC and VLC control units. Look for loose connections, corrosion, or damaged wires that could cause voltage drops.

Check Alternator Output:

• Verify that the alternator is functioning correctly and providing sufficient voltage to the battery and electrical systems.

Replace Faulty Components:

• If any components in the wake-up voltage circuit are found to be faulty, replace them to restore proper voltage levels.

Consult Technical Support:

• If the issue cannot be resolved with the above steps, contact technical support for further assistance. Provide detailed information about the fault and the diagnostic steps taken.

Note:

Low wake-up voltage can be caused by various factors, including aging batteries, poor electrical connections, or faulty alternators. Regular maintenance of the vehicle’s electrical system can help prevent these issues.