have you tested the harness? Can you provide more specific details on what you've tested and the results you got.

 

Heres a list of what I did:

1. Purge Valve Ohms is 25.7 (across pins 1 and 2 on the purge valve)
2. Pin 1 on the PCSV harness and ground measure the same as battery voltage (11.65)
3. Pin 2 on the pcsv connector and pin 42 on the ECM harness is 0 ohms.

everything seems to be checking out atm so i dont know why the code is up there.

Edit:ive noticed on hyundaitechinfo that one wire ends up some where in the fuse box. i havent traced it back that far just so you know

 

yup all that sounds right. The only thing I see a little off is your battery voltage seems a bit low, but that may just be because the test is done with key ON. With key OFF, what voltage do you have across the battery terminals?

Just to double check, you cleared the code after replacing the purge valve right, and then it came back?

 

I'm at work so i cant get a voltage with the key off for you but i would expect it to be normal. ill check to make sure and its the same voltage i have across my battery terminals with the key on.

i cleared the code after replacing the purge valve and the connector individually so 2 times and it came back immediatly each time. from the research ive been doing on the schematics on the electrical system, i dont think the sensor fuse would be back considering for the 2.7Ls its the main fuse for like 8 sensors and id have a lot more codes if that fuse went out.

 

the wiring sounds fine. The fact that the voltage drop between pin 1 and chassis ground is the same as between the battery terminals, means all the voltage is getting to the connector and not being dropped somewhere else. And the fact that you have 0 ohms between pin 2 and the ECU connector confirms the wiring is good there.

Definitely a tough one. So the question is, why does the ECU think there is an open in the circuit.

Question: You said you replaced the purge valve, and the harness connector? which one did you do first, and what made you think to replace the connector? (in other words, what test results did you see to make you replace the connector?)

You sure you didn't accidentally reverse the pins when you rewired the connector? (just a thought)

 

I initially thought the purge valve was bad and just replaced it like a retard.....(should have prob thought it though first) and the connecter had some bad corrosion and the connecter pins were gapped badly so i thought it was just a bad connection.

 

how does it run? have you checked/cleared the code since? have you cleared the code and then unplugged your battery for 20 minutes?

 

runs great

yes i cleared it

cleared the code and unpluged the battery while i was working on the o2 sensors ( bout 30 mins )

 

bump for any more suggestions

 

I'm pretty sure P0444 is thrown when the ECU detects an open in that circuit, so I don't think it is related to the purge valve operating correctly or and blockage in the evap system, as it is purely electrical based. If you had a blockage I think you would have seen a P0441.

Here's another test you could try.

Take your volt meter and back probe the ECU connector P133-3 pin 42 (leave the connector plugged in a use something like a t-pin). Take the red lead on your meter and put it on that pin, take the black lead and put it on a good ground.

With key ON you should see battery voltage on the meter, because no current should be flowing through the circuit since the ECU hasn't ground the circuit on pin 42. You could then try starting the car. I'm not sure exactly when the ECU will decide to ground the purge valve circuit, you may need to be driving, but when it does you should see the voltage on your meter drop to near 0.

This will at least verify the circuit is working, if it checks out, it could be an internal problem in the ECU.

 

im picking up a new ecu from seoful anyways so maybe this will fix the issue