Product Link 121S/300 Caterpillar


MID 122 - CID 0168 - FMI 01

Usage:

769C 01X
产生此代码的情况:

当 Product Link 检测到低于 11 VDC 的蓄电池电压时,此诊断代码被记录。

测试步骤 1. 检查 PRODUCT LINK 模块的系统电压。

起动发动机并在高怠速下运行发动机 5 到 10 分钟。 测量"无开关电源"和"接地"触点间的系统电压。 触针 52 是"无开关电源"的端子,触针 65 是"接地"端子。

预期结果:

24 VDC 系统的电压为 27 VDC 到 29 VDC。 12 VDC 系统的电压为 13 VDC 到 15 VDC。

结果:

  • 确定 - 电压正确。 清除此诊断代码并检查有无其他诊断代码出现。停止

  • 异常 - 电压不正确。 转至测试步骤 2。

测试步骤 2. 检查交流发电机。

高怠速下运行发动机 5 到 10 分钟。 测量蓄电池接线柱上的电压输出。

预期结果:

对于 24 VDC 系统来说,电压范围应当为 27 VDC 到 29 VDC。 12 VDC 系统的电压范围应当为 13 VDC 到 15 VDC。

结果:

  • 确定 - 电压正确。 转至测试步骤 3。

  • 异常 - 电压不正确。

    修复: 修理或更换交流发电机。

    停止

测试步骤 3. 检查蓄电池电压。

将钥匙起动开关转到断开位置。 在蓄电池接线柱处测量电压。

预期结果:

12 VDC 系统的电压应当为 12 VDC 到 15 VDC。 24 VDC 系统的电压应当为 24 VDC 到 27 VDC。

结果:

  • 确定 - 电压在 12 VDC 和 15 VDC 之间,或者电压在 24 VDC 和 27 VDC 之间。

    修复: Product Link 可能出现故障。 更换 Product Link 前,重新检查系统。 Product Link 很少成为诊断代码产生的根源。 请参阅系统操作、故障诊断与排除、测试和调整, "电子控制模块(ECM)- 更换"。 更换 Product Link 后,重新检查系统和检查诊断代码的状态。

    停止

  • 异常 - 电压不在 12 VDC 和 15 VDC 之间,或者电压不在 24 VDC 和 27 VDC 之间。

    修复: 请参考专门说明书, REHS0354, "充电系统故障诊断与排除"。 如果情况未得到解决,则 Product Link 可能出现故障。 更换 Product Link 前,重新检查系统。 Product Link 很少成为诊断代码产生的根源。 请参阅系统操作、故障诊断与排除、测试和调整, "电子控制模块(ECM)- 更换"。 更换 Product Link 后,重新检查系统和检查诊断代码的状态。

    停止

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