3126B and 3126E On-highway Engines Caterpillar


0064-02 Secondary Engine Speed loss of signal (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:

  • 辅助发动机转速/正时信号缺失,接着在一秒内返回。

  • 发动机已运转超过 3 秒。

  • 发动机转速没有经过 350 到 500 rpm 的范围。

  • 信号缺失之前蓄电池电压高于 9 VDC 至少两秒钟。

系统响应:

ECM 将利用辅助发动机转速/正时传感器来计算发动机转速。 卡特彼勒电子技师 (ET) 上"发动机转速"状态的旁边会显示"诊断"。 该代码不会使检查发动机指示灯亮,除非代码保持激活状态十小时以上。 会记录该故障代码。

除非这两个传感器信号都缺失,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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