一辆帕萨特(PASSAT)2.0轿车,采用BFF发动机、自动变速器和制动真空电子助力泵(下称电子助力泵),累计行驶了11.2万km,当发动机怠速运转或正常行驶过程中,只要一踩制动踏板松开后,电子助力泵就工作几秒钟,无论空调是否开启,均是如此,但发动机怠速和加速性能良好。接车后,用故障检测仪检测,发动机电控单元内没有故障代码储存。正常情况下,电子助力泵应该在冷机、节气门开 A PASSAT 2.0 sedan uses a BFF engine, an automatic transmission, and a braked vacuum electric booster pump (112 kilowatts) traveling a total of 112,000 km. As long as the engine is idling or traveling normally, a single step After the brake pedal is released, the electronic booster pump works for a few seconds, regardless of whether the air conditioner is on or off, but the engine idles and accelerates well. After the car, with the fault detector test, the engine ECU no fault code stored. Under normal circumstances, the electronic booster pump should be in the cold, the throttle open