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In the maintenance work, I have encountered several two valve Jetta king often incipient failure, the common point of these failures is that when the engine can not start, the system can not supply oil, the investigation is that the electric gasoline pump has no power supply. Through multi-party inspection, it is determined that the internal contact of the central distribution box is bad, and the output to the power terminal of the oil pump G1 plug No. 8 pin (the back of the distribution box) has no output voltage, and the central distribution box should be replaced.