I have an 02’ Honda Civic that’s not starting, it cranks fine but no start, changed the battery, checked the fuses, checked fuel pump and looked fine. I decided that the immobilizer green flashing key was the most likely issue so I tried scanning it but my scanner had no communication to the original ECU so I got one from the scrapyard after I had a technician tell me the original ECU was no good but still have same issue. The OBDII port has power as when I plug it in with multiple scanners the scanners recognize that it’s connected but try to read but fail to. I need help figuring out how to get my scanners reading the car in order to bypass the immobilizer. I really don’t want to junk the car because it’s still in decent condition with low mileage someone please help I’d be greatly appreciated!

 

Symptoms can also be a failed MICU.

 

can that be the reason my OBDII isnt working properly?

 

 

I've heard people have luck checking the #9 fuse in your engine compartment.

​Other than that, grab a voltmeter.
Pins 4 and 5 are grounds
Pin 16 is power from that fuse IIRC
Dont mess with the others becuase they are for communication and could mess up a bunch of other stuff.

 

Did you ever resolve this? I have the exact same problem. Thanks

 

no I just ended up selling the car

 

yours cracks but doesn’t start too?