Welding Precaution
为避免损坏电子控制模块（ECM）、传感器和相关部件，必须采用正确的焊接步骤。 也应考虑用于从动设备的部件。 如可能，拆下需要焊接的部件。 当在配备电控发动机的应用上进行焊接而又不可能将部件拆下来时，必须遵循下述步骤。 本步骤可尽可能避免电子部件损坏。
- 停止发动机。 断开 ECM 的电源。
- 确保关断通往发动机的燃料供应。
- 从蓄电池上断开蓄电池负极电缆。 如果安装了蓄电池断路开关，应断开此开关。
- 从导线线束上断开所有电气部件。 包括下列部件：
- 从动设备的电气部件
- ECM
- 传感器
- 电子控制阀门
- 继电器
- 电子控制单元
- 从动设备的电气部件
- 如可能，将焊接设备的接地卡箍直接连接到待焊接发动机部件上。 尽可能将夹子夹在焊接点附近。 就近定位可避免焊接电流损坏发动机轴承、电气部件和其他部件。
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| 注意 |
|---|
切勿将电气零部件（电子控制模块或电子控制模块传感器）或电子零部件的接地点用作电焊机的接地点。 |
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| 图 1 | g01143634 |
维修焊接指南（典型示图） | |
- 防止焊接碎屑和/或焊接飞溅物损坏导线线束。
- 采用标准焊接步骤将物料焊接在一起。
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