12年奥迪A7空调压缩机不工作
<section style="box-sizing: border-box; color: rgb(78, 83, 88); font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; outline: 0px !important;">故 障 车 型：奥迪A7</section><section style="box-sizing: border-box; color: rgb(78, 83, 88); font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; outline: 0px !important;">出 厂 日 期：2012年1月</section><section style="box-sizing: border-box; color: rgb(78, 83, 88); font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; outline: 0px !important;">发动机 型号：CHM</section><section style="box-sizing: border-box; color: rgb(78, 83, 88); font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; outline: 0px !important;">发动机 排量：3.0TFSI</section><section style="box-sizing: border-box; color: rgb(78, 83, 88); font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; outline: 0px !important;">行 驶 里 程：90236KM</section><section style="box-sizing: border-box; color: rgb(78, 83, 88); font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; outline: 0px !important;">V I N 代 码：WAUSGC4G9CNXXXXXX</section><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/2025/03/20250304224158247-640.png" alt="20250304224158247-640" data-edit-file-id="243" data-full-url="https://wapq.cn/wp-content/uploads/2025/03/20250304224158247-640.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><section style="box-sizing: border-box; color: rgb(78, 83, 88); font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; outline: 0px !important;"><section style="box-sizing: border-box; outline: 0px !important;"><section style="box-sizing: border-box; outline: 0px !important;"><section style="box-sizing: border-box; outline: 0px !important;"><section style="box-sizing: border-box; outline: 0px !important;"><p style="box-sizing: border-box; margin-bottom: 20px; outline: 0px !important;"><em style="box-sizing: border-box; outline: 0px !important;"><span style="box-sizing: border-box; outline: 0px !important; font-weight: 700;">02</span></em></p></section></section></section></section><section style="box-sizing: border-box; outline: 0px !important;"><section style="box-sizing: border-box; outline: 0px !important;"><section style="box-sizing: border-box; outline: 0px !important;"><section style="box-sizing: border-box; outline: 0px !important;"><section style="box-sizing: border-box; outline: 0px !important;"><p style="box-sizing: border-box; margin-bottom: 20px; outline: 0px !important;">故障现象</p></section></section></section></section></section></section><section style="box-sizing: border-box; color: rgb(78, 83, 88); font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; outline: 0px !important;"><section style="box-sizing: border-box; outline: 0px !important;">客户报修空调不制冷，无维修历史。</section><section style="box-sizing: border-box; outline: 0px !important;"></section></section><section style="box-sizing: border-box; color: rgb(78, 83, 88); font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; outline: 0px !important;"><section style="box-sizing: border-box; outline: 0px !important;"><section style="box-sizing: border-box; outline: 0px !important;"><section style="box-sizing: border-box; outline: 0px !important;"><section style="box-sizing: border-box; outline: 0px !important;"><p style="box-sizing: border-box; margin-bottom: 20px; outline: 0px !important;"><em style="box-sizing: border-box; outline: 0px !important;"><span style="box-sizing: border-box; outline: 0px !important; font-weight: 700;">03</span></em></p></section></section></section></section><section style="box-sizing: border-box; outline: 0px !important;"><section style="box-sizing: border-box; outline: 0px !important;"><section style="box-sizing: border-box; outline: 0px !important;"><section style="box-sizing: border-box; outline: 0px !important;"><section style="box-sizing: border-box; outline: 0px !important;"><p style="box-sizing: border-box; margin-bottom: 20px; outline: 0px !important;">故障确认</p></section></section></section></section></section></section><section style="box-sizing: border-box; color: rgb(78, 83, 88); font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; outline: 0px !important;"><section style="box-sizing: border-box; outline: 0px !important;">接手后试车，操作空调面板AC开关，AC灯点亮后马上熄灭，空调压缩机不工作，与客户描述的报修故障一致。</section></section><section style="box-sizing: border-box; color: rgb(78, 83, 88); font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; outline: 0px !important;"><section style="box-sizing: border-box; outline: 0px !important;"><section style="box-sizing: border-box; outline: 0px !important;"><section style="box-sizing: border-box; outline: 0px !important;"><section style="box-sizing: border-box; outline: 0px !important;"><p style="box-sizing: border-box; margin-bottom: 20px; outline: 0px !important;"><em style="box-sizing: border-box; outline: 0px !important;"><span style="box-sizing: border-box; outline: 0px !important; font-weight: 700;">04</span></em></p></section></section></section></section><section style="box-sizing: border-box; outline: 0px !important;"><section style="box-sizing: border-box; outline: 0px !important;"><section style="box-sizing: border-box; outline: 0px !important;"><section style="box-sizing: border-box; outline: 0px !important;"><section style="box-sizing: border-box; outline: 0px !important;"><p style="box-sizing: border-box; margin-bottom: 20px; outline: 0px !important;">维修过程</p></section></section></section></section></section></section><section style="box-sizing: border-box; color: rgb(78, 83, 88); font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; outline: 0px !important;"><section style="box-sizing: border-box; outline: 0px !important;">接手车辆后，首先连接了空调压力表，以确定空调系统中有足够的制冷剂可以让空调压缩机工作，观察空调压力表，制冷剂压力为6.5巴左右，满足空调压缩机启动的要求。</section></section><section style="box-sizing: border-box; color: rgb(78, 83, 88); font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; outline: 0px !important;"><section style="box-sizing: border-box; outline: 0px !important;"><section style="box-sizing: border-box; outline: 0px !important;"></section></section></section><section style="box-sizing: border-box; color: rgb(78, 83, 88); font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; outline: 0px !important;"><section style="box-sizing: border-box; outline: 0px !important;">因为该车型的压缩机是否工作全部都由控制模块进行控制，所以我们使用解码器连接车辆，利用解码器进行诊断。</section></section><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/2025/03/20250304224052993-640-1.png" alt="20250304224052993-640 (1)" data-edit-file-id="240" data-full-url="https://wapq.cn/wp-content/uploads/2025/03/20250304224052993-640-1.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><section style="box-sizing: border-box; color: rgb(78, 83, 88); font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; outline: 0px !important;"><section style="box-sizing: border-box; outline: 0px !important;">使用解码器读取全车故障代码发现了几个故障代码而且无法清除，这几个故障码中有一个关键的故障代码就是制冷剂压力/温度传感器（无信号通讯）。</section></section><section style="box-sizing: border-box; color: rgb(78, 83, 88); font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; outline: 0px !important;"><section style="box-sizing: border-box; outline: 0px !important;"><section style="box-sizing: border-box; outline: 0px !important;"></section></section></section><section style="box-sizing: border-box; color: rgb(78, 83, 88); font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; outline: 0px !important;"><section style="box-sizing: border-box; outline: 0px !important;">如果空调控制模块接收不到制冷剂压力传感器的信号，那么空调控制模块就无法判断现在空调系统管路中的制冷剂压力是多少，为了防止空调系统损坏，控制模块在接收不到制冷剂压力传感器信号或者接收到错误的制冷剂压力传感器信号时，不会控制空调压缩机工作，这时也就无法制冷。</section></section><section style="box-sizing: border-box; color: rgb(78, 83, 88); font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; outline: 0px !important;"><section style="box-sizing: border-box; outline: 0px !important;"><section style="box-sizing: border-box; outline: 0px !important;"></section></section></section><section style="box-sizing: border-box; color: rgb(78, 83, 88); font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; outline: 0px !important;"><section style="box-sizing: border-box; outline: 0px !important;">接着我们找到空调压力/温度传感器，拔下插头测量传感器的三根线。</section></section><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/2025/03/20250304224033182-640-2.png" alt="20250304224033182-640 (2)" data-edit-file-id="235" data-full-url="https://wapq.cn/wp-content/uploads/2025/03/20250304224033182-640-2.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><section style="box-sizing: border-box; color: rgb(78, 83, 88); font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; outline: 0px !important;"><section style="box-sizing: border-box; outline: 0px !important;">测量空调压力传感器三根线电压，发现传感器的供电部分是正常的，但是信号部分不正常，该车型的空调压力传感器信号是通过LIN总线进行传递的，无论拔下插头还是插上插头，电压都不应该是6.6V。</section></section><section style="box-sizing: border-box; color: rgb(78, 83, 88); font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; outline: 0px !important;"><section style="box-sizing: border-box; outline: 0px !important;"><section style="box-sizing: border-box; outline: 0px !important;"></section></section></section><section style="box-sizing: border-box; color: rgb(78, 83, 88); font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; outline: 0px !important;"><section style="box-sizing: border-box; outline: 0px !important;">那么造成这种情况的可能一般为线路有故障或这条LIN总线上的其他模块有故障导致的电压过低，接着查找电路图。</section></section><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/2025/03/20250304224034965-640-3.png" alt="20250304224034965-640 (3)" data-edit-file-id="236" data-full-url="https://wapq.cn/wp-content/uploads/2025/03/20250304224034965-640-3.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;">根据电路图的标示，在空调压力传感器的这条LIN总线上，还有一个空气湿度传感器，如果空气湿度传感器有故障，也有可能导致LIN总线电压异常，接着我们拔下空气湿度传感器的插头，测量了空气湿度传感器的插头，测量结果为空气湿度传感器供电正常，LIN总线电压5.37V。</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/2025/03/20250304224034624-640-4.png" alt="20250304224034624-640 (4)" data-edit-file-id="237" data-full-url="https://wapq.cn/wp-content/uploads/2025/03/20250304224034624-640-4.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;">LIN总线电压同样低于正常电压，说明故障不在空气湿度传感器，现在排除了LIN总线上的两个传感器，那么故障只有可能是线路故障或J519控制模块故障了。为了快速判断是J519损坏还是LIN总线线路有问题，我们决定找到J519，在J519插头处测量LIN总线电压。</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;"> </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/2025/03/20250304224034300-640-5.png" alt="20250304224034300-640 (5)" data-edit-file-id="238" data-full-url="https://wapq.cn/wp-content/uploads/2025/03/20250304224034300-640-5.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;">找到J519后，把J519模块上的LIN总线端子使用端子拆装工具把端子推出，插头插回去测量从J519出来的LIN总线电压。</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/2025/03/20250304224035801-640-6.png" alt="20250304224035801-640 (6)" data-edit-file-id="239" data-full-url="https://wapq.cn/wp-content/uploads/2025/03/20250304224035801-640-6.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;">从J519插头处测量到的LIN总线电压为8V左右，但是从两个传感器插头处测量的电压只有6V左右，说明线路存在问题，于是直接使用一根导线代替原车线路（飞线），再次使用解码器清除故障码，发现空调压力传感器的故障码可以清除了。</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/2025/03/20250304224157222-640-7.png" alt="20250304224157222-640 (7)" data-edit-file-id="241" data-full-url="https://wapq.cn/wp-content/uploads/2025/03/20250304224157222-640-7.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;">现在空调压力信号已经恢复正常，但是还有一个空调试运行技术规格-无基本设置的故障码，想要解决这个故障码，我们需要使用ODIS进行操作。<img decoding="async" src="https://wapq.cn/wp-content/uploads/2025/03/20250304224158557-640-8.png" alt="20250304224158557-640 (8)" data-edit-file-id="242" data-full-url="https://wapq.cn/wp-content/uploads/2025/03/20250304224158557-640-8.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;"><img decoding="async" src="https://wapq.cn/wp-content/uploads/2025/03/20250304225036749-640-9.png" alt="20250304225036749-640 (9)" data-edit-file-id="244" data-full-url="https://wapq.cn/wp-content/uploads/2025/03/20250304225036749-640-9.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><section style="box-sizing: border-box; color: rgb(78, 83, 88); font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; outline: 0px !important;"><section style="box-sizing: border-box; outline: 0px !important;">使用ODIS的引导性功能对该模块进行活动风门和空调压缩机运行匹配后故障排除。</section><section style="box-sizing: border-box; outline: 0px !important;"></section></section><section style="box-sizing: border-box; color: rgb(78, 83, 88); font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; outline: 0px !important;"><section style="box-sizing: border-box; outline: 0px !important;"><section style="box-sizing: border-box; outline: 0px !important;"><section style="box-sizing: border-box; outline: 0px !important;"><section style="box-sizing: border-box; outline: 0px !important;"><p style="box-sizing: border-box; margin-bottom: 20px; outline: 0px !important;"><em style="box-sizing: border-box; outline: 0px !important;"><span style="box-sizing: border-box; outline: 0px !important; font-weight: 700;">05</span></em></p></section></section></section></section><section style="box-sizing: border-box; outline: 0px !important;"><section style="box-sizing: border-box; outline: 0px !important;"><section style="box-sizing: border-box; outline: 0px !important;"><section style="box-sizing: border-box; outline: 0px !important;"><section style="box-sizing: border-box; outline: 0px !important;"><p style="box-sizing: border-box; margin-bottom: 20px; outline: 0px !important;">维修总结</p></section></section></section></section></section></section><section style="box-sizing: border-box; color: rgb(78, 83, 88); font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px; outline: 0px !important;"><section style="box-sizing: border-box; outline: 0px !important;">在维修空调压缩机不工作时，可以使用解码器读取故障代码，看看有没有能影响到空调压缩机工作的故障代码，同时也要注意其他控制单元是否存有空调相关的故障码。</section><section style="box-sizing: border-box; outline: 0px !important;"></section><section style="box-sizing: border-box; outline: 0px !important;">还有该车型的空调压力/温度传感器是使用LIN总线进行信号传递的，而接收这些信息是J519车载电网控制单元，J519车载电网控制单元再通过CAN总线把这些信息发送到空调控制模块，所以在空调控制系统内就读不到关于空调压力/温度传感器相关的故障码，而是只能读出“由于丢失信息而功能受到损害”</section></section><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></p>
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