3516B Engine for 994F and 994H Wheel Loaders Caterpillar


ECM Does Not Communicate with Other Modules

Usage:

994F 442

可能原因

  • 电气接头

  • Cat 数据链路

  • CAN 数据链路(如适用)

  • 电子控制模块(ECM)

建议的措施

电气接头

检查 J1/P1 和 J2/P2 ECM 接头的安装是否正确。 检查所有其他相关接头的安装是否正确。 请参阅故障诊断与排除, "电气接头 - 检查"。

Cat 数据链路

确认 Cat 数据链路没有开路或短路。 请参考故障诊断与排除, "Cat 数据链路 - 测试"。

CAN 数据链路(如适用)

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"。

ECM

连接 Caterpillar 电子技师(ET)。 如果 ECM 与 Cat ET 不通信,请参阅故障诊断与排除, "电子维修工具不通信"。

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