2010年宝马523L油位传感器故障案例
<p style="box-sizing: border-box; margin-bottom: 20px; color: rgb(78, 83, 88); font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; outline: 0px !important;"><span style="box-sizing: border-box; outline: 0px !important; color: var(--main-color);">车辆信息：2010年宝马523LI，搭载子N52自然吸气发动机</span></p><p style="box-sizing: border-box; margin-bottom: 20px; color: rgb(78, 83, 88); font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; outline: 0px !important;"><img decoding="async" src="https://wapq.cn/wp-content/uploads/2025/03/%E5%9B%BE%E7%89%87-1-2.png" alt="图片 1" data-edit-file-id="166" data-full-url="https://wapq.cn/wp-content/uploads/2025/03/图片-1-2.png" imgbox-index="0" style="box-sizing: border-box; outline: 0px !important; border: 0px; vertical-align: middle; max-width: 100%; max-height: 100%; height: auto; display: block; margin: auto;"></p><p style="box-sizing: border-box; margin-bottom: 20px; color: rgb(78, 83, 88); font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; outline: 0px !important;">故障现象：该车加满汽油之后，仪表油位显示指针升不到顶，修理厂反映更换了油箱浮子，仪表油位显示指针依然升不到顶。准备更换仪表，但拿不准，犹豫不决，故开到我厂检测。</p><p style="box-sizing: border-box; margin-bottom: 20px; color: rgb(78, 83, 88); font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; outline: 0px !important;">故障检修：接车后，修理厂司机告诉我现在油箱已经加满汽油，但仪表油位指针只在一半的位置。连接诊断仪读取故障码，故障码如下图所示:</p><p style="box-sizing: border-box; margin-bottom: 20px; color: rgb(78, 83, 88); font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; outline: 0px !important;"><img decoding="async" src="https://wapq.cn/wp-content/uploads/2025/03/%E5%9B%BE%E7%89%874.png" alt="图片4" data-edit-file-id="167" data-full-url="https://wapq.cn/wp-content/uploads/2025/03/图片4.png" imgbox-index="1" style="box-sizing: border-box; outline: 0px !important; border: 0px; vertical-align: middle; max-width: 100%; max-height: 100%; height: auto; display: block; margin: auto;"></p><p style="box-sizing: border-box; margin-bottom: 20px; color: rgb(78, 83, 88); font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; outline: 0px !important;"> </p><p style="box-sizing: border-box; margin-bottom: 20px; color: rgb(78, 83, 88); font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; outline: 0px !important;">有两个油箱传感器的故障码，其他故障码咱先不管，因为司机报修的只是仪表油箱剩余油量显示不准确。然后使用专检读取该车油箱的油量</p><p style="box-sizing: border-box; margin-bottom: 20px; color: rgb(78, 83, 88); font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; outline: 0px !important;"><img fetchpriority="high" decoding="async" class="" src="https://wapq.cn/wp-content/uploads/2025/03/%E5%9B%BE%E7%89%875.png" alt="图片5" width="743" height="350" data-edit-file-id="171" data-full-url="https://wapq.cn/wp-content/uploads/2025/03/图片5.png" imgbox-index="2" style="box-sizing: border-box; outline: 0px !important; border: 0px; vertical-align: middle; max-width: 100%; max-height: 100%; height: auto; display: block; margin: auto;"></p><p style="box-sizing: border-box; margin-bottom: 20px; color: rgb(78, 83, 88); font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; outline: 0px !important;">可以从数据流中看出，油箱传感器2是没有检测到油位的，之后根据引导查看该车的电路图，电路图如下:</p><p style="box-sizing: border-box; margin-bottom: 20px; color: rgb(78, 83, 88); font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; outline: 0px !important;"><img decoding="async" src="https://wapq.cn/wp-content/uploads/2025/03/%E5%9B%BE%E7%89%876.png" alt="图片6" data-edit-file-id="168" data-full-url="https://wapq.cn/wp-content/uploads/2025/03/图片6.png" imgbox-index="3" style="box-sizing: border-box; outline: 0px !important; border: 0px; vertical-align: middle; max-width: 100%; max-height: 100%; height: auto; display: block; margin: auto;"></p><p style="box-sizing: border-box; margin-bottom: 20px; color: rgb(78, 83, 88); font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; outline: 0px !important;">从该电路图得知，油箱的油量传感器是通过仪表2号脚和3号脚给的信号电压到达燃油泵的5号和6号脚，通过油量传感器后从燃油泵的2号和3号脚回到仪表的16号和15号脚接地。如果油位显示不准确，有可能是：线路、油位传感器、仪表损坏，因此便拔下油泵插头，使用万用表20v直流档测量2号和5号脚，和3号和6号脚，测量值如下:</p><p style="box-sizing: border-box; margin-bottom: 20px; color: rgb(78, 83, 88); font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; outline: 0px !important;"><img decoding="async" src="https://wapq.cn/wp-content/uploads/2025/03/%E5%9B%BE%E7%89%877.png" alt="图片7" data-edit-file-id="169" data-full-url="https://wapq.cn/wp-content/uploads/2025/03/图片7.png" imgbox-index="4" style="box-sizing: border-box; outline: 0px !important; border: 0px; vertical-align: middle; max-width: 100%; max-height: 100%; height: auto; display: block; margin: auto;"></p><p style="box-sizing: border-box; margin-bottom: 20px; color: rgb(78, 83, 88); font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; outline: 0px !important;"><img decoding="async" src="https://wapq.cn/wp-content/uploads/2025/03/%E5%9B%BE%E7%89%878.png" alt="图片8" data-edit-file-id="170" data-full-url="https://wapq.cn/wp-content/uploads/2025/03/图片8.png" imgbox-index="5" style="box-sizing: border-box; outline: 0px !important; border: 0px; vertical-align: middle; max-width: 100%; max-height: 100%; height: auto; display: block; margin: auto;"></p><p style="box-sizing: border-box; margin-bottom: 20px; color: rgb(78, 83, 88); font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; outline: 0px !important;">可以从两次测量中确定，仪表到油泵之间的线路，没有问题，然后便使用阻值档测量油泵上插头的，2号和5号脚，与3号和6号脚，测量结果如下。</p><p style="box-sizing: border-box; margin-bottom: 20px; color: rgb(78, 83, 88); font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; outline: 0px !important;"><img decoding="async" src="https://wapq.cn/wp-content/uploads/2025/03/%E5%9B%BE%E7%89%879.png" alt="图片9" data-edit-file-id="172" data-full-url="https://wapq.cn/wp-content/uploads/2025/03/图片9.png" imgbox-index="6" style="box-sizing: border-box; outline: 0px !important; border: 0px; vertical-align: middle; max-width: 100%; max-height: 100%; height: auto; display: block; margin: auto;"></p><p style="box-sizing: border-box; margin-bottom: 20px; color: rgb(78, 83, 88); font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; outline: 0px !important;"><img decoding="async" src="https://wapq.cn/wp-content/uploads/2025/03/%E5%9B%BE%E7%89%8710.png" alt="图片10" data-edit-file-id="173" data-full-url="https://wapq.cn/wp-content/uploads/2025/03/图片10.png" imgbox-index="7" style="box-sizing: border-box; outline: 0px !important; border: 0px; vertical-align: middle; max-width: 100%; max-height: 100%; height: auto; display: block; margin: auto;"></p><p style="box-sizing: border-box; margin-bottom: 20px; color: rgb(78, 83, 88); font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; outline: 0px !important;">可以从测量中得出2号和5号脚阻值是过小的，只有20欧母，而3号和6号脚却有250欧母。现在以经可以初步判定油位传感器损坏，但是了百分百确定油位传感器损坏，找了两个可调电阻，把阻值调到250欧母。接到3号和6号脚与2号和5号脚。如下图所示:</p><p style="box-sizing: border-box; margin-bottom: 20px; color: rgb(78, 83, 88); font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; outline: 0px !important;"><img decoding="async" src="https://wapq.cn/wp-content/uploads/2025/03/%E5%9B%BE%E7%89%8711.png" alt="图片11" data-edit-file-id="174" data-full-url="https://wapq.cn/wp-content/uploads/2025/03/图片11.png" imgbox-index="8" style="box-sizing: border-box; outline: 0px !important; border: 0px; vertical-align: middle; max-width: 100%; max-height: 100%; height: auto; display: block; margin: auto;"></p><p style="box-sizing: border-box; margin-bottom: 20px; color: rgb(78, 83, 88); font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; outline: 0px !important;">再读取数据流:</p><p style="box-sizing: border-box; margin-bottom: 20px; color: rgb(78, 83, 88); font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; outline: 0px !important;"><img decoding="async" src="https://wapq.cn/wp-content/uploads/2025/03/%E5%9B%BE%E7%89%8712.png" alt="图片12" data-edit-file-id="175" data-full-url="https://wapq.cn/wp-content/uploads/2025/03/图片12.png" imgbox-index="9" style="box-sizing: border-box; outline: 0px !important; border: 0px; vertical-align: middle; max-width: 100%; max-height: 100%; height: auto; display: block; margin: auto;"></p><p style="box-sizing: border-box; margin-bottom: 20px; color: rgb(78, 83, 88); font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; outline: 0px !important;">可以看到油位传感器显示数值了，再看仪表，仪表正常到顶。</p><p style="box-sizing: border-box; margin-bottom: 20px; color: rgb(78, 83, 88); font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; outline: 0px !important;">故障排除：更换油位传感器2，故障解决。</p><p style="box-sizing: border-box; margin-bottom: 20px; color: rgb(78, 83, 88); font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; outline: 0px !important;">故障总结：像油位传感器、水温传感器等，大多都是通过电阻串联分压，从两个电阻中间采样电压做为信号使用，因而在测量时我们可以先使用万用表测量传感器的电压，如何有电压，并不能百分之百说明他线路是好的，这时我们便可以使用滑动电阻进行模拟传感器，便可以快速判定问题的所在。</p><p></p>
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