3406E, C-10 and C-12 On-highway Engines Caterpillar


Intermittent Engine Shutdown

Usage:

3406E 1LW

可能原因

故障的根本原因按顺序列于下方:

  • 诊断代码

  • 蓄电池供电或 ECM 接地

  • 售后发动机保护设备

  • 燃油供给

  • 发动机速度/正时传感器

  • ECM 或个性化模块

注: 在试图故障诊断与排除前,使发动机停机。

建议的措施

按次序进行下述诊断步骤:

  1. 检查有无诊断代码。

    1. 连接 Caterpillar 电子技师(Cat ET)。

    1. 检查 Cat ET 上有无激活的诊断代码。

      注: 某些诊断代码会导致发动机停机。 在继续进行本程序之前,应先进行所有故障诊断代码的故障诊断与排除。

  1. 检查 ECM 的蓄电池电源或接地。

    1. 确保下列接头已正确安装:

      • J1/P1 和 J2/P2 ECM 接头

      • J5/P5 喷油器接头

      • J9/P9 发动机转速/正时传感器接头

    1. 如果故障只是在发动机暖机后出现,并且在发动机冷却后消失,断路器可能由于热量而跳闸。 检查车上的断路器,以确定断路器是否自动复位。

  1. 检查售后发动机保护设备。 这些设备通常会中断 ECM 的供电,ECM 将无法与 Cat ET 进行通信。

    1. 检查售后发动机保护设备是否正确安装。

    1. 检查售后发动机保护设备是否正确安装。

    1. 确认 ECM 接收到蓄电池供电电压。

  1. 检查燃油供油。

    1. 监测起动盘车发动机期间排气有无白烟。

      如果未出现白烟的话,故障可能出在燃油质量或供油上。

    1. 检查燃油质量。

    1. 检查燃油压力。

    1. 确保燃油系统已充注。

    1. 检查供油管路有无阻塞。

    1. 检查燃油滤清器。 关于燃油系统方面的更多信息,请参阅测试和调整。 此外请参阅卡车应用和安装指南, LEBT5109。

    1. 如果温度低于 0 °C (32 °F),检查燃油有无凝固(结蜡)。

  1. 检查发动机转速 / 正时传感器。

    请参阅故障诊断与排除, "发动机转速 / 正时传感器电路 - 测试"。

  1. 检查 ECM 或个性化模块。

    请参阅故障诊断与排除, "ECM 存储器 - 测试"。

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