检查和测试机械单位，如发动机，变速器，车桥及制动系统，以确定故障和失灵位置。

Inspect and test mechanical units, such as engines, transmissions, axles and brake systems, to locate faults and malfunctions.

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同样地，有时，有些故障可能在系统中已经产生但并没有“检查发动机”灯或故障码信号显示。

Similarly, at times, some problems may occur in the system even when there has been no check engine light or trouble code signal.

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注意：避免过量填充，否则发动机可能发生故障。在加入机油后，应再次检查油平面。

Notice: Avoid overfilling, or the engine could be damaged. Check the oil level on the dipstick once again after adding the oil.

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