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B1200 B0xxx · 车身（B） 低严重度
Climate Control Module Serial Data / Panel Fault
The climate control panel has lost communication or failed internally. Often a power or data-line issue rather than a dead panel.
严重程度说明： 低——通常不影响行驶，下次保养时处理即可
你会注意到的故障现象
- Climate display blank or unresponsive
- No response to button presses
- Blower runs on a default setting
常见原因
按可能性从高到低排列——从最上面开始查。
- 1 Failed control panel
- 2 LIN or CAN data line fault
- 3 Power supply problem
- 4 Software fault
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。
- ✓ Check the HVAC fuses and the panel connector first.
- ✓ Read for accompanying U-codes — a data-line fault shows up alongside.
- ✓ Inspect the LIN wire between the panel and the HVAC module.
- ✓ Try a panel reset or reconfiguration before replacement.
维修方案
- Repair the power or data line
- Replace the control panel
- Reflash if a software update applies
B1200 —— 常见问题
Is the panel or the wiring at fault? +
Read the accompanying codes. A U-code alongside means check the data line first.
Does the A/C still work with a dead panel? +
Usually in a default mode — enough to demist, but not controllable.