C13, C15, and C18 Tier 4 Interim Engines Caterpillar


Aftertreatment Cooling Fan - Test

Usage:

C18 BDN
系统运作描述:

该代码表示低风扇转速警告。 如果到电子控制模块(ECM)的反馈不在指令转速的 300 rpm 范围内,则此警告出现。 如果失去与风扇的通信,此警告也出现。

利用此步骤进行后处理冷却风扇的故障诊断与排除,或者在表 1 内的诊断代码激活或被记录时采用此步骤。

注: 以下代码可能不适用于特定的应用。

表 1
故障诊断代码    
CDL 代码     J1939 代码     说明
(代码说明可能不同)    
系统响应    
E1190(3)         后处理风扇转速 - 低     如果风扇转速不在指令转速的 300 rpm 范围内,则记录该代码。 另外,如果电子控制模块(ECM)和风扇之间失去 CAN 数据链路的通信,也记录该代码。    



图 1g03195256

典型接线示意图

表 2
故障诊断与排除测试步骤     数值     结果    

1. 检查风扇

A. 检查风扇有无下列情况:

1. 风扇叶片损坏
2. 碎屑阻塞风扇叶片
3. 气流受阻
   

风扇损坏    

结果:风扇未损坏或阻塞。

转至测试步骤 2。

结果:风扇阻塞。

清除阻塞物。 确认故障已排除。

结果:风扇损坏。

更换风扇。 确认故障已排除。
   

2. 检查风扇上有无电压

A. 断开到风扇的两针接头。

B. 测量接头上的触针 1 和 2 之间的电压。
   

电压等于蓄电池电压    

结果:电压等于蓄电池电压。

转至测试步骤 3。

结果:电压不等于系统电压。

风扇和蓄电池之间的导线存在故障。 检查风扇和蓄电池之间的保险丝。 修理导线。
   

3. 检查风扇和 ECM 之间是否导通

A. 断开后处理冷却风扇上的四针接头。

B. 检查接头和 ECM 之间是否导通。 检查全部三条导线是否导通。
   

导通性    

结果:全部三条导线都导通。

更换后处理冷却风扇。 确认故障已排除。

结果:全部三条导线都不导通。

修理或更换导线。 确认故障已排除。
   

测试步骤 1.

按所列步骤顺序完成以上步骤。

结果:

  • 以上步骤解决了此问题。 - 停止

  • 以上步骤没有解决问题。 -

    修复: 联系当地 Cat 代理商的技术通信员(TC)。 如需进一步的帮助,您的 TC 可以通过代理商解决方案网络(DSN)与您交谈。

    停止

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