Machine Security System Caterpillar


General Information

Usage:

143H 1AL
一个电气部件的故障可能会导致其它部件出现故障。 同样,一个电气部件的故障可能是由其它部件的故障引起的。 在更换部件之前,务必先尝试排除电气系统故障的原因。

注: 如果怀疑机器安全系统有问题,确保机器的起动系统工作正常。 利用电气系统示意图进行起动电路的故障诊断与排除。

注: 电子控制模块很少出现故障。 更换 ECM 前,执行本手册故障诊断与排除, "症状程序"部分内提供的故障诊断与排除程序。

测试过程从最容易出现故障的点开始向最不容易出现故障的点依次进行。 这些程序通常按以下顺序进行:

  • 部件损坏。

  • 导线或接头损坏。

  • 电子模块损坏。

每个程序假设以下数据成立:

  • 系统上以前没有执行过故障诊断与排除。

  • 系统未经过更改。

修理假设:

  • 蓄电池充满电且充电系统工作正常。

  • Caterpillar 电子技师(ET)可用,且技师接受过 Cat ET 的操作培训。 请参阅故障诊断与排除, "维修工具"。

故障诊断和排除过程中,在更换任何部件之前应先检查所有连接。 如果这些连接不清洁、不牢固,则可能会导致永久性电气故障或间歇性电气故障。 检查并确认已将导线完全推入接头中。 在进行其它测试之前,确保所有连接牢固。

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