Diagnostic Capabilities
电子控制模块(ECM)监控 ECM 和发动机部件之间的电路。 ECM 还监控发动机工作状况。 如果 ECM 检测到故障,就会产生一个代码。
有两种代码:
- 诊断故障代码
- 发动机事件
故障诊断代码 - 故障诊断代码表明存在电气故障。 代码可能表示发动机导线或电气部件中存在短路或开路。
发动机事件 - 发动机事件表示检测到异常发动机工作状况。 例如,如果机油压力过低,就会生成一个故障诊断代码。 此时,故障诊断代码表示故障现象。 事件代码表示存在异常工作状况或机械故障,而不是电气故障。
代码可以有两种不同的状态:
- 主动
- 记录
现行代码表示存在故障。 首先应处理现行代码。 请参阅故障诊断与排除, "诊断故障代码"以了解特定代码的相应故障诊断与排除步骤。
这些代码被记录和存储在 ECM 存储器中。 故障可能已经排除和/或故障可能不再存在。 如果系统通电,一旦有部件断开,诊断代码即激活。 重新连接部件后,代码不再为激活状态,但代码会记录下来。
记录的代码可能并不意味着需要修理。 故障可能只是暂时存在过。 记录的代码可能对间歇性故障的诊断和排除有帮助。 记录的代码也可以用来检查发动机和电子系统的性能。
Caterpillar Information System:
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Product Link - PL522/523 System Overview
Product Link - PL522/523 System Components
Product Link - PL522/523 Configuration
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Product Link - PL522/523 Installation Parameters Configure
Product Link - PL522/523 Spare Input Configure