WebJun 25, 2024 · Save Big on Auto Repairs. The PCM power diode is put into the fuel pump and PCM relay power circuit to prevent power surge feedback into the circuit called flyback voltage then can be higher than normal operating voltage. The computer may get flyback voltage surge and may damage power circuits inside the PCM is the diode was not used … WebHello Select your address All ...
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WebSep 19, 2010 · John Mc : The fuel pumps stop with the diode because it interrupts the pcm. If the fuel pump is running constant it is because you have a short to vref (5v sensor circuit) and this is causing your problem. WebHow To Check A Diode Using A Digital Multimeter ...Top diode testing tips on youtube!! Klown How To Use A Multimeter To Test a diode .. Tutorial Automotive E... prorewards atd
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