ECM Does Not Communicate with Other Modules
- ECM 的供电
- Cat 数据链路或 CAN 数据链路电路有故障
- 电气接头安装
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| 故障诊断与排除测试步骤 | 数值 | 结果 |
1. ECM 的供电 A. 检查 ECM 的供电。 请参阅故障诊断与排除, "电源 - 测试"。 B. 将 Cat 电子技师连接到维修工具接头上。 |
ECM 的供电 |
结果：Cat ET 未连接。 请参阅故障诊断与排除, "电子维修工具不通信"。 |
2. Cat 数据链路或 CAN 数据链路电路有故障 A. 确认数据链路没有开路或短路。 |
Cat 数据链路 |
结果：请参阅故障诊断与排除, "Cat 数据链路 - 测试"和故障诊断与排除, "CAN 数据链路 - 测试"。 |
3. 电气接头安装 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。 |
电气接头 |
结果：请参阅故障诊断与排除, "电气接头 - 检查"。 |
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