What causes the insulation fault display in BAIC New Energy vehicles?
3 Answers
BAIC New Energy vehicles displaying insulation faults may be caused by electric vehicle insulation failure, damaged or leaking insulation in the wiring, or insulation damage in the motor coils, which could be burnt or water-damaged. Professional inspection is required. Blown fuse: Solution: Use a multimeter to measure the battery terminal voltage. If there is voltage output, it is normal; if there is no voltage output, the fuse may be blown, the battery connector may be loose, or the battery may be faulty. Loose wiring connector: Solution: Check the power switch connector. Faulty power switch: Solution: Use a multimeter to measure the voltage at both the input and output ends of the power switch. If there is normal voltage output, the power switch is functioning properly; if there is no voltage output (when the battery has voltage output), the power switch is faulty and should be repaired or replaced.
I've been researching electric vehicles for over a decade. BAIC New Energy insulation faults are usually high-voltage system issues. Damaged insulation in battery pack wiring or connectors may cause short circuits due to vibration wear or water ingress; water entering the drive motor or charging port can also trigger alarms; battery cooling pipeline leaks are common causes; software sometimes falsely reports faults; high environmental humidity accelerates corrosion. During inspection, measure insulation resistance values - if below safety thresholds it's dangerous and components must be replaced or sealed. Never force operation as high-voltage leakage can cause injuries or fires. Recommended to have professional repair shops conduct tool-based diagnostics to avoid DIY electric shock risks.
Last year, while driving my BAIC New Energy vehicle, I encountered an insulation fault warning, which gave me quite a scare. After the car was parked outdoors following a rainy day, the system alarm went off, and I immediately sent it to the after-sales service. The technician found accumulated water droplets on the chassis wiring, repaired the sealing ring, and dried it. They also advised avoiding the charging port and cooling areas when washing the car and parking in a garage to prevent moisture. Since then, I've been regularly maintaining and checking the wiring, and the issue hasn't recurred. If you encounter something similar, don't ignore the alarm; promptly visit a 4S shop to prevent minor issues from escalating and disrupting your trip.
