994F Wheel Loader Hydraulic System Caterpillar


Electronic Control Module (ECM) - Replace

Usage:

994F 442
更换 ECM 之前,应确保确实有必要更换 ECM。 ECM 不太可能是诊断代码的原因。 务必检查 ECM 有适当的接地和电源。 更换 ECM 之前,建议代理商维修人员联系 ECM 热线帮助台。 ECM 热线将提供指导意见以确定是否需要更换 ECM。 代理商技术联系人有 ECM 热线的联系信息。

注: 新的电子控制模块可以按两种方式提供:一种是针对特定机器进行预编程,一种是不编程的 ECM。 对于未编程的 ECM,必须使用 Caterpillar 电子技师(ET) 进行编程。 请参阅测试和调整, "电子控制模块 (ECM) - 闪存编程"。 查看项目6 以确定 ECM 是否已编程。

  1. 将钥匙起动开关和断路开关转到 OFF 位置。

  2. 从 ECM 上断开机器线束。

  3. 拆下 ECM。

  4. 确保用来更换的 ECM 的零件号正确。

  5. 将机器线束与 ECM 相连。

  6. 确定 ECM 是否已编程。 将 Caterpillar 电子技师(ET)连接到维修工具接头上。 ET 与 ECM 通信。

    ET 会指明 ECM 是否已编程。 对于未编程的 ECM,必须使用 ET 中含有的 WinFlash 软件进行编程。 请参阅测试和调整, "电子控制模块 (ECM) - 闪存编程"。

    如果 ECM 已经编程,ET 将接入 ECM。

注: 可能会看到 ET 菜单发生变化。 有关特定 ET 菜单的信息,请查看适当的主题。

注: 任何标定步骤都不能忽略,否则会影响性能。 确保执行全部标定步骤。 即使用来更换的 ECM 是从类似机器获得的,也要执行全部标定步骤。

注: 更换 ECM 后,操作员的档案会丢失。

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