How to deal with intermittent failures如何处理间歇性故障

Note:提示： ♦  In order to facilitate the determination of the status of intermittent faults, the customer should first be asked about the driving conditions of the vehicle, weather conditions, frequency of fault occurrence and fault symptoms, and then try to simulate the fault phenomenon. Determine whether the detection circuit is damaged or normal, and at the same time confirm and eliminate the fault. You can refer to the fault symptom table of each system to narrow down the scope of possible faults.为便于确定出现间歇性故障的状态，首先应询问客户关于车辆的行驶状况、天气状况、故障出现频率及故障症状，然后尝试模拟故障现象。判断检测回路是否损坏或正常，同时确认并排除故障。可参考每个系统的故障现象表，缩小可能发生故障的范围。

1. Vibration method1. 震动法

1 Use your finger to gently vibrate the potentially malfunctioning component or sensor and check to see if the malfunction recurs.用手指轻轻震动有可能出现故障的部件或传感器，并检查故障是否重现。   Caution:注意： ♦  If you use too much force, it may cause the relay to open circuit.若太过用力，可能导致继电器断路。

2 Gently shake the connector horizontally and vertically to determine whether the fault recurs.在水平和垂直方向上轻轻地摇动接插件，判断故障是否重现。

3 Gently shake the wiring harness and connector horizontally and vertically to determine whether the fault recurs.在水平和垂直方向轻轻地摇动线束和接插件，判断故障是否重现。

2. Heating method2. 加热法

1 Use a hair dryer or similar items to heat the parts where the malfunction may occur to determine whether the malfunction recurs.采用电吹风或相似物品对有可能产生故障的部位加热，判断故障是否重现。   Caution:注意： ♦  It is prohibited to damage the structure of parts when heating.加热时禁止破坏零部件结构。 ♦  Do not apply heat directly to the control unit and other electronic control units.请勿直接对控制单元及其他电子控制单元加热。

3. Water spray method3. 喷水法 1 Spray water on the vehicle to determine whether the fault recurs.对车辆进行喷水，判断故障是否重现。   Caution:注意： ♦  It is prohibited to spray water directly on the front compartment and high- and low-voltage components.禁止直接对前舱以及高低压部件喷水。   Note:提示： ♦  If a vehicle leaks water, it can cause damage to some electrical components. Be particularly careful when conducting water spray tests on your vehicle.如果车辆漏水，会对一些电气元件造成损害。对车辆进行喷水试验时，一定要特别小心。

4. Others4. 其他 1 Turn on all loads and check whether the fault recurs.接通所有负载，检查故障是否重现。