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B1500 B0xxx · 车身（B） 中严重度
Seat Belt Switch / Buckle Circuit Fault
The buckle switch that tells the vehicle whether the belt is fastened is not reporting correctly, affecting warnings and restraint strategy.
严重程度说明： 中——已影响行驶或排放，请本周内安排检修
你会注意到的故障现象
- Belt warning chime with the belt fastened
- No warning when unfastened
- Airbag lamp on some vehicles
常见原因
按可能性从高到低排列——从最上面开始查。
- 1 Failed buckle switch
- 2 Debris or drink residue in the buckle
- 3 Wiring damage under the seat
- 4 Corroded connector
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。
- ✓ Operate the buckle several times and watch the switch state in live data.
- ✓ Inspect the buckle for contamination — spilled drinks are a common cause.
- ✓ Check the connector and wiring under the seat.
维修方案
- Replace the buckle assembly
- Clean the buckle
- Repair the wiring
B1500 —— 常见问题
Can I clean a sticky buckle? +
Yes — flush with clean water and dry thoroughly. Avoid penetrating oils that attract dirt.
Does it affect airbag deployment? +
On many vehicles yes: the ECU uses buckle status to choose the deployment strategy.