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Q. BMW X5 N62 엔진인데, 점화코일 교환후에 LIN BUS고장코드가 뜨는데 원인이 뭘까요?
BMW N62엔진은 550i, X5, X6, 750i, 650i 등에 사용되는 V8 트윈터보 엔진이다. 점화코일 교환하거나 벨브커버 교환시에는 절대적으로 기억해야할것이 그라운드 가 확실하게 해주어야 한다. 정확한 볼트 부품에 정확한 토크로 잘 잠그어주어야 한다. 그렇지 않을경우 LIN BUS 고장코드가 발생할 수 있다.
Courtesy of https://static.nhtsa.gov/odi/tsbs/2014/MC-10148021-9999.pdf
N63: Proper Ignition Harness Installation and Ground Connections
BMW TSB #SI B12 24 14, Engine Electrical Systems, September 2014 Technical Service.
MODEL All with the N63 engine SITUATION The BSD (Bit Serial Data) interface communication fault(s) are set shortly after repairs, which required removal of the ignition harness from the cylinder head cover. Depending on the type of a fault, when the BSD communication is disrupted and the oil level sensor (QLT) data is no longer received by the DME, possible symptoms will include: Reduced CBS oil service forecast Not possible to reset the CBS oil service Oil level measurement not possible Diagnosis of the fault leads to isolating the damaged component on the BSD circuit (DME, alternator voltage regulator, QLT sensor). CAUSE Any of the BSD interface components could be damaged immediately upon engine start if the ignition ground circuit, integrated into the metal bushing of the ignition coil harness duct on both cylinder banks, is not secured to the engine cover with the correct bolt and to the specified torque.
Courtesy of https://static.nhtsa.gov/odi/tsbs/2014/MC-10148021-9999.pdf
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