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U0293 U0xxx · 网络通信（U） 高严重度
Lost Communication with Hybrid / EV Battery Energy Control Module
The battery management controller is not responding. The vehicle will not ready-up, and this is high-voltage territory.
严重程度说明： 高——立即停车诊断，继续行驶有扩大损坏的风险
你会注意到的故障现象
- Will not ready
- HV battery warning
- No charging possible
常见原因
按可能性从高到低排列——从最上面开始查。
- 1 BMS supply or earth fault
- 2 HV interlock open
- 3 CAN fault
- 4 Failed BMS board
如何排查
先做花钱最少、侵入最小的检查——大多数这类码不是零件问题。
- ✓ Only HV-qualified technicians should proceed beyond basic checks.
- ✓ Verify the service disconnect and HV interlock are correctly seated.
- ✓ Check the BMS low-voltage supply and earth.
- ✓ Read the BMS directly with a capable EV tool.
维修方案
- Restore the interlock and supply
- Repair the wiring
- Replace the BMS (HV-qualified work)
U0293 —— 常见问题
Can I charge the car? +
No. Charging requires BMS supervision; without it the contactors stay open.
Is this a battery replacement job? +
Rarely. Most cases are interlock, supply or communication faults, not a failed pack.