0171-04 Ambient Air Temperature voltage low
产生此代码的情况:
发动机控制模块 (ECM) 检测到以下情况:
- 来自大气压力传感器的信号电压低于 0.2 VDC 超过 8 秒。
- "允许怠速停机超越"被设定为 "基于外界温度"或 "基于 J1587 外界温度"。
- ECM 至少已通电两秒钟。
系统响应:
ECM 将 65°C ()149 °F 默认为外界气温。 在卡特彼勒电子技师 (ET) 中,在 "外界温度传感器"状态的旁边将会显示 "诊断"。
当此代码激活时,"允许怠速停机超越"停用。
测试步骤 1. 进行以下的诊断步骤: 发动机温度传感器开路或短路 - 测试
结果:
- 正常 - 停止
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