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B0001 B0xxx · 车身（B） 高严重度
Driver Frontal Stage 1 Deployment Control
A fault in the driver's frontal airbag first-stage deployment loop. This is a safety system — the airbag will not fire correctly until it is repaired.
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
- Airbag warning lamp on
- Possibly no horn or steering-wheel buttons
- Airbag disabled
常见原因
按可能性从高到低排列——从最上面开始查。
- 1 Open or high resistance in the squib circuit
- 2 Faulty clock spring under the steering wheel
- 3 Damaged connector under the seat or column
- 4 Failed airbag control module
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。
- ✓ Do not probe airbag circuits with a test lamp — use a load resistor and follow the manufacturer's safety procedure.
- ✓ Read the airbag ECU for the specific loop resistance fault.
- ✓ Inspect the clock spring first; it is the highest-failure item in this circuit.
- ✓ Check connectors under the dash for loose or pushed pins.
维修方案
- Replace the clock spring
- Repair the squib wiring or connector
- Replace the airbag module only after circuit checks
B0001 —— 常见问题
Is the airbag live while I test? +
Disconnect the battery and wait the manufacturer-specified time (usually 10–15 minutes) before touching any yellow connector.
Can I clear the code and ignore it? +
No. The restraint system will not deploy as designed, and the lamp will return immediately.