3126B and 3126E On-highway Engines Caterpillar


0064-11 Secondary Engine Speed no pattern (34)

Usage:

3126B 1AJ
产生此代码的情况:

发动机控制模块 (ECM) 检测到以下情况:

  • 主发动机转速/正时信号仍有效的同时,辅助发动机转速/正时信号缺失,接着在一秒内返回。

  • 辅助发动机转速/正时信号缺失和/或间歇性。

  • 发动机盘车起动期间,辅助发动机转速/正时信号缺失超过 15 秒钟。

系统响应:

ECM 将利用主发动机转速/正时传感器来计算发动机转速。 ECM 在该代码设置激活状态十小时后会点亮检查发动机指示灯。 会记录该故障代码。

除非这两个转速信号都缺失,否则不会影响性能。 如果这两个正时传感器信号都缺失的话,则会使 ECM 关停发动机。

测试步骤 1. 进行以下的诊断步骤: 发动机转速/正时传感器电路 - 测试

结果:

  • 正常 - 停止

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