Intake Manifold Air Differential Temperature Is High
系统运作描述:
表 1 列出了进气歧管空气温差高的诊断故障代码。
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| 诊断故障代码 | ||
|---|---|---|
| CDL 代码 | 代码说明 | 注释 |
| E1228（1） | 进气歧管空气温差高 | 此代码表示发动机进气的温差已升高到编程设定的阈值以上。 |
遵循故障排除步骤来确定故障根源。
测试步骤 1. 检查空对空后冷器（ATAAC）有无阻塞（如有配备）
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 | |
| 图 1 | g02129374 |
ATAAC 的检查点 | |
检查 ATAAC 外表面是否积累了大量污垢或碎屑。 另外确认 ATAAC 散热片没有损坏。
预期结果:
ATAAC 上没有可见的污垢、碎屑积累迹象或损坏。
结果:
- 正常 - ATAAC 表面未损坏，并且 ATAAC 没有积累大量的污垢或碎屑。 转至测试步骤 2。
- 正常 - ATAAC 表面损坏，或 ATAAC 已经积累大量的污垢或碎屑。
修复: 如有必要，清洁 ATAAC。 如果 ATAAC 损坏，则更换 ATAAC。
如果故障仍然存在，转至测试步骤2。
测试步骤 2. 检查冷却风扇的工作情况
- 确认发动机冷却风扇工作正常。
如果风扇由传动带驱动，则确认传动带张力适当。 另外，确认离合器工作正常。
如果风扇由液压驱动，则确认马达四周无泄漏，且风扇的压力适当。
预期结果:
风扇驱动系统工作正常。
结果:
- 异常 - 风扇驱动系统工作异常。
修复: 如果风扇由传动带驱动，则对离合器或传动带张紧装置执行必要的调整或执行所有必要的修理。 有关详细信息，参考测试和调整。如果风扇由液压驱动，则修理发现的所有泄漏。 确保风扇控制系统工作正常。 有关详细信息，参考故障排除, "冷却风扇控制 - 测试"。
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