3512B, 3512C, and 3516B Petroleum Engines and Petroleum Generator Set Engines with Dynamic Gas Blending Caterpillar


Engine Shutdown Override Occurrence

Usage:

3512B 4AW
使用本步骤对下述任一发动机诊断代码进行故障诊断与排除。

表 1
诊断代码表    
J1939 代码和描述     产生代码的状况     系统响应    
971-31
发动机减额开关    
当任意发动机减额启用时,发动机停机超越开关激活。 (1)     电子控制模块 (ECM) 将暂停停机开关发送的任何关停发动机的请求。    
1237-31
发动机停机超越    
发动机停机超越开关激活时,任意发动机停机开关激活。 (1)
注:停机超越开关激活不会停用因发动机超速状况引发的发动机停机。    
( 1 ) 控制面板通过 CAN 数据链路发送请求可以激活此代码以便执行相关作业。

可能原因

发动机停机超越开关

  • 发动机停机超越开关激活

  • 发动机停机超越开关电路故障

建议的措施

注: 下面以概率的先后顺序列出了这些步骤。 依次完成这些步骤。

表 2
故障诊断与排除测试步骤     数值     结果    

1. 检查代码

A. 将 Caterpillar 电子技师(ET)连接到维修工具接头上。 如有必要,请参阅故障诊断与排除, "电子维修工具"。

B. 在执行任何故障诊断与排除或清除故障诊断代码前,从发动机 ECM 下载"产品状态报告"。

C. 确定指向此步骤的故障诊断代码是否存在。

D. 针对指向此步骤的事件代码,检查有无系统相关的激活的诊断代码。
   

971-31 或 1237-31
   

结果:存在相关代码。

修理:在继续进行此测试前,诊断并排除所有相关代码。

结果:971-31 或 1237-31 激活。

转至下一步。

结果:没有激活的代码

停止
   

2. 启动停机开关

A. 与操作员沟通,确定紧急停机关闭的原因。
   

开关    

结果:紧急停机启动。

复位停机开关。 确认紧急停机开关的情况得以解决。

通过循环钥匙开关复位控制系统。

结果:紧急停机未启动。

转至下一步
   

3. 检查停机开关电路

A. 检查停机开关有无振动、潮气或腐蚀引起的损坏迹象。 检查停机开关电路。 请参阅故障诊断与排除, "开关电路 - 测试"。
   

回路    

结果:停机开关电路损坏。

修理:诊断故障后修理故障。

确认修理后故障得到排除。
   

Caterpillar Information System:

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