414E, 416E, 420E and 430E Backhoe Loaders Caterpillar


Backup Alarm Always On

Usage:

416E BWC
系统运作描述:


图 1g01662373

倒车报警器示意图

当 ECM 从反向方向开关收到信号时,ECM 向倒车报警器供电。

倒车警报的可能原因如下:

  • 线束电路短路。

  • ECM 出现故障。

测试步骤 1. 检查有无线束短路

  1. 将断路开关转到断开位置。

  1. 从 ECM 上断开线束接头。

  1. 将倒车报警器从线束上断开。

  1. 在 ECM 的机器线束接头上,测量触点 J2-13(导线 331-OR)与所有其他可能的蓄电池正极电源之间的电阻。

预期结果:

各个电阻应大于 5000 欧姆。

结果:

  • 是 - 所有电阻测量值都大于 5000 欧姆(无连续性)。 线束电路的电阻正确。 ECM 不太可能会出现故障。 再次进行该步骤。

    修复: 如果没有找到原因,则需更换 ECM。 请参阅故障诊断和排除, "ECM(Electronic Control Module,电子控制模块)- 更换"。

    停止

  • 否 - 电阻测量值小于 5000 欧姆(连续性)。 线束出现故障。 对应的导线对线束内的导线 331-OR 短路。

    修复: 修理或更换线束。

    停止

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