CX31-P600-C11I, CX31-P600-C13I, CX31-P600-C15I, CX31-P600-C18I and CX31-P600-C9I Petroleum Power Train Packages and CX31-P600 Petroleum Transmission Power Train Electronic Control System Caterpillar


MID 027 - CID 1834 - FMI 02

Usage:

CX31-P600 GFY
产生此代码的情况:


图 1g01944364
钥匙起动开关的接线

ECU 检测到以下情况:

由于钥匙开关在最后一秒内循环通断至少三次,导致来自钥匙开关的信号异常。

注: 快速循环钥匙开关即可产生该代码。 应用上有些控制模块可能需要进行此操作,以触发闪存代码。 如果这种情况发生,应清除记录的诊断代码以防将来引起混淆或做出不正确的诊断。

系统响应:

ECU 将记录诊断代码,当此诊断代码激活时,控制面板上的警告灯将闪烁。 ECU 将停止通电喷油器电磁阀,发动机将关闭。

测试步骤 1. 检查线束。

  1. 将钥匙起动开关转到断开位置。

  2. 检查线束。

  3. 检查是否正确配对。

  4. 检查裸露的导线有无刻痕和磨损。

  5. 检查是否潮湿、脏污或腐蚀。

  6. 检查触针/插孔是否合适。

预期结果:

线束正常。

结果:

  • 正常 - 线束正常。 转至测试步骤 2。

  • 异常 - 线束损坏。

    修复: 修理或更换机器线束。

    停止

测试步骤 2. 检查该诊断代码是否仍处于现行状态。

  1. 检查线束接头。 清理线束接头的触点,并检查导线绝缘层是否由于过热、蓄电池酸液或擦伤而损坏。

  2. 对与电路有关的每一根导线进行拉力为 45 N (10 lb) 的拉拔测试。

  3. 重新连接所有线束接头。 确保接头完全座入且每个接头的夹子完全紧固。

  4. 将断路开关和钥匙起动开关转到接通位置。

  5. 操作机器。

  6. 确定 CID 1834 FMI 02 是否为激活状态。

预期结果:

CID 1834 FMI 02 为激活状态。

结果:

  • 是 - CID 1834 FMI 02 为激活状态。 此故障没有得到排除。

    修复: 再次检查电路。 ECU 不太可能会出现故障。 先退出此步骤,然后重新执行此步骤。 如果没有找到该诊断代码的原因,则应更换 ECU。 更换 ECU 之前,务必先咨询当地代理商的技术通信员征求 Caterpillar 可能的意见。 此咨询可以大大降低维修时间。 请参阅测试和调整, KENR8291, "电子控制单元 - 更换"。

    停止

  • 否 - CID 1834 FMI 02 为未激活状态。 此时不存在该故障。

    修复: 原有诊断代码可能是由于某个断开后又重新连接的线束接头存在电气连接不良而引起的。 使机器恢复正常运转。

    停止

Caterpillar Information System:

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