0190-02 Primary Engine Speed Loss of Signal (34)
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。
- 发生短路或开路状况之前蓄电池电压高于 9 VDC。
系统响应:
ECM 将使用辅助转速/正时传感器。 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"。
发动机响应没有明显变化，除非辅助转速/正时传感器送来的信号同时缺失。 这样的缺失将会使发动机停机。
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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