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05 Honda Accord check engine on

Old Dec 8, 2024 | 12:22 AM
  #1  
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djs
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Exclamation 05 Honda Accord check engine on

Check engine is now on and is solid and will periodically flash. Replaced the radiator when it first came on a while ago. The big issue is that the OBD port does not communicate with a reader.
It turns on but no diagnosis is given. I checked the ports and they look fine (not car savvy). Looking to see what would cause the OBD port to not communicate with any reader?
 
Old Dec 8, 2024 | 04:31 PM
  #2  
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A lot of items can cause the OBD port to loose communication. The easiest is that your code reader is not working. The parts stores read codes as a free service, so you might want to stop by and have them scan for codes.

Other items are damaged wiring, faulty PCM, some component on the network grounding out the network. These items are pretty technical to test. You can check all the fuses in your car, so the engine bay, passenger interior, and driver's interior boxes to see if a fuse blew.

There is a way to check for codes using a piece of wire or a thin paperclip on the OBD2 connector. If you want to try this route, I can give you the pins to short, but you must be 100% sure you are shorting the correct wires. Doing the wrong wires can damage the PCM.
 
Old Dec 8, 2024 | 06:35 PM
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djs
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I went to AutoZone and they couldn't read it as well as trying with a OBD reader on my own did not work. Ironically enough I think someone just sent me the codes. Is there a video reference you recommend to make sure I short the correct wires? Just to confirm as well, are the codes you are referring to from instructables?
 
Old Dec 8, 2024 | 10:41 PM
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I'm not sure where I found the info.

If you look at the OBD2 connector, the wider edge has pins 1-8 and the shorter side 9-16. Getting the spacing right is tricky with the font on this forum.

\...1...2...3...4...5...6...7...8 /
...\9 10 11 12 13 14 15 16 /

Wire colors to the pins are:
4 blk
5 brn/blk
7 gry
9 brn
14 ???
16 wht/grn

Be 100% sure you are jumping the correct wires. I think the obd2 connector can pop out of the housing wiht a clip and I recommend you do this to look closely at the wires.

All you will need is a paperclip or a thin wire. Make sure that you jump the pin with the #9 brown pin to pin #4 blk wire. Then turn the key to the II position, then count the check engine light flashes. A long blink=10, short=1.

Post the check engine light flashes on here.
 

Last edited by PAhonda; Dec 8, 2024 at 10:43 PM.
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