no power to obd2 port
 

my 01 civic lx has a cel and i have my own scanner but when i plug it in nothing happens. it should light right up and start reading, but i get nothing. is there a fuse or something that i dont know about? i thought it was connected directly to the ecu.

RE: no power to obd2 port
 

Check fuse 9 in the under-hood fuse relay/box (see picture). Note that multiple other functions would also be lost if fuse 9 were blown.

http://img231.imageshack.us/img231/7...ure0308ek0.jpg

RE: no power to obd2 port
 

fuse no9 is good i think i may have lost the ground, anyone have any idea where to find that?

RE: no power to obd2 port
 

The manual for your code reader may show a diagram of the data link connector (DLC), where you can determine which terminal supplies battery power. With this information, you can use a multimeter or test light to directly test whether your car's DLC is receiving battery power. If so, the problem might be your code reader.

RE: no power to obd2 port
 

See picture. Again, it may be helpful that the same ground is shared by several other components.

http://img218.imageshack.us/img218/4...ure0312db4.jpg

RE: no power to obd2 port
 

my code reader is good i just used it on my wifes car to check it. as for shared grounds my car is m/t and have no heated seats. i did have my center console out today installing a new shifter boot, i may have knocked something loose, but i dont think i did.

RE: no power to obd2 port
 

Edit: Comment deleted - your previous post answered the questions.