C4.4 and C6.6 Engines for Caterpillar Built Machines Caterpillar


ECM Will Not Communicate with Other Systems or Display Modules

Usage:

CS-56B 437

可能原因

  • 电气接头

  • 数据链路

  • 电子控制模块 (ECM)

  • CAN 数据链路(如适用)

建议的措施

  1. 将电子维修工具连接到诊断接头上。 如果 ECM 与电子维修工具间不通信,请参阅故障诊断与排除, "电子维修工具与 ECM 间不通信"。

  2. 确保以下各项安装正确且无损坏。 请参阅故障诊断与排除, "电气接头 - 检查"。

    • ECM 上的 P1/J1 和 P2/J2 接头

    • 到显示模块的导线

    • 到其他控制模块的导线

  3. 排除数据链路的可能故障。 请参阅故障排除, "数据链路电路 - 测试"。

  4. 确认 CAN 数据链路没有开路或短路。 请参阅故障诊断与排除, "CAN 数据链路电路 - 测试"。

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