Injector Circuit & Wiring Diagram

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Uploaded by on Jan 18, 2011

Learn to test and analyze automotive fuel injector circuits from a wiring diagram perspective. Fuel injectors are attached to the fuel rail. It is very time consuming to detect and prove a clogged fuel injector. The technician needs to disassemble the fuel rail, de-activate the fuel pump and perform lengthy tests to prove the fault. However, there is another way. Using current ramping techniques the technician is able to prove the fuel injector without any disassembly at all. Get the scoop here and save time.

Presented using graphics software technology to denote the concepts. Part of our wiring diagram set of videos shown here in this channel. Enjoy...

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  • Hi thank you for uploading this video, very very informative. However I have a question, does each fuel injector have individual transistors or all injectors have one transistor only? I'm asking because the 4th injector of my car does not fire any fuel. Already swapped injector but still it won't fire. Hope you could help. Thank you and have a great day.

  • Confused, when the injector ground path is active , the relay closes the 30pin to 87 from 87a? to bridge across and grounds 30 to 87 when working properly? ,and when the asd relay detects a problem it bypasses the ground so the injector does not fire ?thanks i am new to automotive electrical.

  • ECU ya tool

  • basic

  • Excellent vide. Thank you very much

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