车身控制模块手刹信号丢失故障分析

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【摘  要】文章针对车辆拉手刹后熄火，再次发动时不显示驻车制动灯的问题，对故障件进行深入测试，从理论分析和实际测试两方面分析出组合仪表无法显示驻车制动灯的主要原因，并为此问题提供软件解决方案。最后经过大量实车测试验证发现，更改手刹CAN信号处理方式能够有效解决这一难题。

【关键词】车身控制模块;CAN信号;软件更新

中图分类号：U463.6    文献标识码：B    文章编号：1003-8639（ 2024 ）11-0105-03

Fault Analysis for the Loss of Handbrake Signal in the BCM

【Abstract】This article referring to the problem that the combined instrument can’t display the parking brake light，when pulling the handbrake before turning off then start again， we have conducted extensive tests to its fault. We summarized the main reasons from two aspects， which is theoretical analysis and practical tests. And we proposed a software programme to solve this problem. In the end， the real vehicle test proved that the change the handbrake CAN signal processing method can solve this problem.

【Key words】BCM;CAN signal;software update

车辆车身控制模块BCM（Body Control Module）的内部电路控制复杂且市场索赔率比较高，大多数的车身控制模块故障件返回之后故障很难再现，造成査找原因困难、分析过程耗时长等问题。（剩余3914字）