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We all know that high-end cars generally have this headlight cleaning function. In fact, this function is OK for our customers. It is only used when following a car at high speed at night. Remove a layer of plaster from the lamp to make the light field of the lamp better. I came across a Magotan B7L today. The headlights do not spray water, other functions are normal. The client wants to fix this feature.
We all know that high-end cars generally have this headlight cleaning function. In fact, this function is OK for our customers. It is only used when following a car at high speed at night. Remove a layer of plaster from the lamp to make the light field of the lamp better.
I came across a Magotan B7L today. The headlights do not spray water, other functions are normal. The client wants to fix this feature. I use the computer to check the fault code of this car first, as shown in the figure below: There are 1 reasons why the headlight cleaning does not work due to the fault code. J39 relay. 2. SC22 fuse. 3. Headlamp wash pump. 4. J519. Fault 5. First check the combination switch or circuit failure of fuse Sc22. If you find a blown fuse, replace the fuse, clean the headlights, and test the pump. The fault has not been eliminated.
Then I connect the computer to enter "09-Functional component test". The headlight cleaning function is normal, and the J519 output signal and the headlight cleaning pump control circuit are normal. Therefore, the fault point is concentrated between the combination switch, the J519 receiving signal and the line, and check whether the J519 code is normal.
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