914G Compact Wheel Loader and IT14G Integrated Toolcarrier Transmission Electronic Control System Caterpillar


Using Caterpillar Electronic Technician to Determine Diagnostic Codes

Usage:

IT14G 1WN


将 ET 与机器相连。 将钥匙开关转到 RUN(运转)位置。 起动 ET。 ET 将发起与机器上电子控制模块的通信。 通信建立起来之后 , ET 会列出机器上的电子控制模块。 选择所需的电子控制模块。 选择激活的诊断代码屏幕。 使用 CAT ET 确定了诊断代码之后 , 请参阅相应诊断代码的测试程序。

参考: 故障诊断和排除, "维修工具"

激活的诊断代码



图 1g00803779
激活的诊断代码的典型 ET 屏幕

下述程序可能会导致记录新的诊断代码。 因此,执行任何程序之前,先列出所有激活的诊断代码,以确定系统有无故障。 完成各个程序后,清除程序所引起的诊断代码。

注: 执行程序之前,一定要先检查所有断路器。 排除跳闸断路器跳闸的原因。

ET 中提供了显示激活的诊断代码的屏幕。 该屏幕显示所有激活的诊断代码。 激活的诊断信息包括部件识别符 (CID)、故障模式识别符 (FMI) 和问题的文字描述。

记录的诊断代码



图 2g00803780
记录的诊断代码的典型 ET 屏幕

ET 中提供了显示记录的诊断代码的屏幕。 该屏幕显示所有记录的诊断代码。 ET 将记录间歇性诊断代码。 记录的诊断数据包括部件识别符 (CID)、故障模式识别符 (FMI) 和问题的文字描述。 此外,记录的诊断数据还包括问题出现的次数和两个时间标记。 一个时间标记显示问题第一次出现的时间,另一个时间标记显示问题最近一次出现的时间。

诊断信息记录在非挥发性存储器中。 通电时,ECM 会清除过去机器运作 100 小时内未检测到的或未激活的所有诊断代码。

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