在大多数汽车的引擎盖下，在2010年之前出售的卡车和SUV是液压转向系统。它利用动力转向压力开关来测量液压线内部的压力，以便发动机控制模块可以增加或降低液压流以最大程度地提高整个电池的效率。
The power steering pressure switch is like any other sensor in that it is suspect to wearing out or breaking due to the extreme conditions it is exposed to daily. This component is always sending information to the vehicle's ECM anytime the engine runs, which can cause extensive wear within the electrical components that are contained inside the pressure switch. If this situation occurs, the动力转向压力开关故障将给出一些警告标志，例如检查引擎灯亮起，并在开车时转向缓慢。
第1部分：更换动力转向压力开关
需要的材料
- Boxed end wrench or ratchet wrench
- Hydraulic line wrenches
- 液体遏制排水盘
- 替换动力转向压力开关
- Safety equipment (safety glasses & plastic or rubber gloves)
- 扫描工具
步骤1：断开电池并抬起车辆。Before removing any parts, locate the vehicle's battery and disconnect the positive and negative battery cables.
- 笔记：此步骤应该始终是您在任何车辆上工作时要做的第一件事。
用液压升降机或千斤顶和千斤顶支架抬起车辆。
步骤2：卸下发动机盖和辅助部件。With most vehicles, it is easy to gain access to the power steering pressure switch, but some require you to remove a few components, including the engine cover, air filter and hoses, and the battery.
有关您需要删除的内容的确切说明，请始终参考车辆的服务手册。
步骤3：卸下动力转向压力开关的电气线束。Once you locate the power steering pressure switch, you'll need to remove the electrical harness attached to this component.
用手指按下电气线束侧面的标签，将其卸下。
如果将电动线束连接到另一个线束上，请从该连接中取出线束，而不是在动力转向压力开关上的连接。这是带有新安全带的动力转向压力开关很常见的。
步骤4：卸下压力开关。If the pressure switch is attached to a hydraulic line, you'll need to use two wrenches to remove it.
Secure one side of the end wrench to the bottom of the hydraulic line and the other to the actual sensor switch.
Hold the bottom wrench in place as you loosen the top power steering pressure switch. Once you get it loose, you should be able to hand screw the power steering pressure switch off the hydraulic line.
Make sure you place rags underneath the fitting as hydraulic fluid will most likely leak.
步骤5：检查旧的和新的动力转向压力开关。自动零件商店为您提供错误的动力转向压力开关非常常见。
这就是为什么我们建议您完成对新旧检查的物理检查的原因。
Make sure the following parts are exactly the same: the connection that screws into the hydraulic line or the power steering pump, and the electrical harness connection.
The color, size and shape can be different for individual aftermarket part manufacturers, but as long as the fittings are identical, it should be okay to use.
步骤6：安装新的压力开关。将新的动力转向压力开关拧入在液压线或动力转向泵上的连接中。
开关紧密后，使用两个扳手固定新开关。不要过度拧紧此开关，否则可能会剥离。
步骤7：将电动线束重新连接到传感器或继电器。根据您拥有哪种类型的安全带，请确保在完成此工作之前已连接。
步骤8：准备驾驶车辆。将动力转向液储存液填充到正确的指示线，然后重新连接电池电缆。
步骤9：测试车辆。作业完成后，在测试维修之前，请确保使用扫描工具从计算机上清除所有错误代码。在您进行路线测试车辆之前，请启动车辆并在下面检查是否有泄漏。建议快速进行5英里的路测。
如果您已经阅读了这些说明，但仍然没有100％对完成此维修的自信万博体育入口万博亚洲客户端动力转向pressure switch replacement为你工作。
