J+ Booster Premature Charge Termination

Charger frequently reports that charging is complete even though the vehicle battery is not full, and no error code is shown.

Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Vehicle-side charge limit or timer, Intermittent pilot signal drop from J+ Booster, Overly sensitive temperature or current limit causing early stop, Loose connection in output cable

How to Fix / Troubleshooting

Safety: This is usually not a direct hazard but can be inconvenient.

Check vehicle settings: Ensure the vehicle is not set to charge only to a partial state of charge or within a limited time window.
Monitor session: Watch the charger and vehicle displays when the stop occurs to see which side initiates it.
Inspect cable and connector: Look for damage or looseness that could interrupt the pilot signal.
Try another charger: If another EVSE charges the vehicle fully, the J+ Booster may have an intermittent pilot or temperature issue requiring service.

Repair Difficulty

Medium 3/5

Required Part

J+ Booster Output Cable Assembly

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