Cat Data Link
CAT 数据链路是 ECM 的输入和输出。 数据链路通过接头 J1-3 和 J1-9 与 ECM 相连。 数据链路设计用于通过机器线束与其他电子控制模块进行通信。 数据链路是不可见的部件。 数据链路由内部 ECM 电路和连接线束线路组成。 数据链路是双向的。 数据链路可使 ECM 接收并发送信息。
Caterpillar 电子技师（ET）还可通过数据链路与其它 ECM 模块进行通信。 ET 会列出其它 ECM 模块及可用的诊断信息。 接收的信息如下所示。
- 发动机转速 - 显示在 Caterpillar 监控系统上。
变速箱 / 底盘 ECM 从Caterpillar 监控系统中接收位置代码的信息。
变速箱 / 底盘 ECM 通过数据链路发送信息。 要发送的信息如下所示。
- 档位状态 - 显示在 Caterpillar 监控系统上。
- 停车制动器状态 - 显示在 Caterpillar 监控系统上。 此外，无论何时停车制动器开启，Caterpillar 监控系统就会显示发动机小时数。
- 机器速度 - 显示在 Caterpillar 监控系统上。
- 诊断维修代码 - 显示在 Caterpillar 监控系统上。
- 举升模式状态 - 显示在 Caterpillar 监控系统 和 ET 上。
- 更多信息可以通过 ET 维修工具和 ECAP 维修工具获取以供使用。
所有使用数据链路的电子控制装置都有一个模块识别符（MID）。 变速箱 / 底盘 ECM 的 MID 是数字 027。
Caterpillar Information System:
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