3524B Engines for Off-Highway Trucks Caterpillar


E272 Inlet Air Restriction Warning

Usage:

3524B 1AW
产生此代码的情况:

电子控制模块(ECM)检测到以下一种情况:

  • 左侧涡轮增压器的进气压力高于默认值 7 千帕 (28 英寸水柱)的情况达五秒钟。

  • 右侧涡轮增压器的进气压力高于默认值 7 千帕 (28 英寸水柱)的情况达五秒钟。

系统响应:

ECM 会记录此事件。

  • 进气系统可能存在问题。

  • 一个进气压力传感器可能存在问题。

测试步骤 1. 检查有无"当前"诊断代码

  1. 启动卡特彼勒电子技师(ET)。

  1. 将钥匙开关转到 ON 位置。 发动机应处于停机状态。

  1. 检查有无当前或记录的诊断代码。

预期结果:

没有任何诊断代码存在。

结果:

  • 与预期结果相符 - 没有任何诊断代码存在。 继续执行测试步骤 2。

  • 与预期结果不相符 - 有诊断代码存在。

    修复: 修正存在的诊断代码。 请参考本手册"对诊断代码进行故障诊断和排除"部分的相应主题。确保修正后问题被排除。

    停止

测试步骤 2. 检查进气系统。

  1. 检查进气系统。 有关检查进气和排气系统的信息,请参考测试和调整手册。

预期结果:

进气系统没有问题。

结果:

  • 与预期结果相符 - 可能存在间歇性问题。

    修复: 监测发动机的运转。 修正问题。 确保修正后问题被排除。

    停止

  • 与预期结果不相符 - 进气系统存在问题。

    修复: 修正问题。 确保修正后问题被排除。

    停止

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