一輛2006款BMW 730Li，搭載N52B30BF發動機，累計行駛里程約為24.6萬km。該車發動機怠速抖動，發動機故障燈異常點亮，且進氣管處有輕微的回火聲。利用Pico示波器來診斷異常，若只單純做壓力測試是無法發現異常的，因此也要進行汽缸壓縮壓力測試，可以大大提升診斷效率。

若遇到單測傳感器電壓信號與同時測量爆震傳感器電路電壓時，兩個的電壓差異甚大，以下的文章就會介紹其造成的原因，並搭配著PICO波形圖片來讓您更好理解，也會說明如何去解決此問題。總結為TA375探頭測量的CAN信號波型振鈴弱很多，而標準測試線測量CAN信號表現也非常出色，具有很高的分辨率並能夠正常譯碼。

A 2014 Mazda CX-5 with a PY engine. Accumulated mileage of about 250,000 kilometers, the car due to the engine idle speed shaking, engine fault light is lit abnormally fault. Using a pico oscilloscope and a pressure sensor WPS500X, measure the intake and exhaust pulses at startup and the ignition signal of cylinder 1 simultaneously. Replacement of cylinder 4 intake valve and valve seat after test drive, the engine idles smoothly, the fault is eliminated.

2019 Kia Forte, equipped with G4FG engine, accumulated mileage of about 93,000 kilometers, the owner of the car went to the store and reported that the engine malfunction light occasionally illuminated abnormally. Using a pico oscilloscope to simultaneously measure the near-light power supply, FTPS power supply, signal and brake booster vacuum pressure sensor signal waveforms, it was found that when the near-light switch was turned on, the near-light power supply appeared to be significantly fluctuating, and at the same time interfered with the 5 V power supply of the FTPS, so that the signal of the FTPS was also synchronized with the abnormal fluctuations.

燃油泵的三個相線通過線圈相互連接，經過測試，其中任何一個相線與搭鐵短路都會使3個相線電壓全部被拉低，導致燃油泵不工作。圖五中的異常波動波型出現時間不到500ms，時間間隔較短，所以未能導致發動機熄火。使用pico示波器捕捉和模擬器故障發生時的波型，可以幫助維修人員精準、快速診斷偶發性故障。