BYD Sealion 06 EV: USB Charging Ports Not Working Diagnosis

If you want to correctly troubleshoot the USB charging port faults on the BYD Sealion 06 EV, simply refer to the OEM Wiring Diagram. This diagram provides the circuit-level reference needed to trace the USB charging circuits and associated accessory power-supply paths when diagnosing inoperative USB charging ports. Attempting to do repairs without the wiring diagram may be difficult, and there is a huge risk of misdiagnosis or unnecessary component replacement.

This diagram helps answer these questions​

1. Why are the BYD Sealion 06 EV USB charging ports not working?
2. How do you diagnose a BYD Sealion 06 EV USB charging-port fault?
3. How do you test the USB charging power circuit?
4. How do you identify the accessory power supply for the BYD Sealion 06 EV USB ports?
5. How do you diagnose a fault in the USB charging circuit?
6. Which circuit diagram is needed to diagnose the BYD Sealion 06 EV USB charging ports?
7. How are the USB charging, backup power supply, and wireless phone charging circuits documented?

How to Access the Diagram​

To access the wiring diagram, simply click on the link below. Within the diagram, you will find the USB charging circuits. I have attached a screenshot below to help you quickly navigate to the section where the diagram is located. Once you find it, you can then print or save it.

Please note that the year in the document is not the YOM but the document release date, so it covers the entire model range. Also note that the document applies to all countries where the model is sold, including China, South Africa, Singapore, the UK, Australia, New Zealand, Thailand, Brazil, Canada, etc.