I am getting this code, canister purge volume control valve.
I checked and I am getting battery voltage at the harness pins 2 and 5 to ground. removed the hoses, turned ignition on and off, can see and hear the stepper motor moving. Seems to be smooth, can here the click, click, click as it adjusts.
Get 30 ohms between 2 and 1/3 and 5 and 4. 5 to 6 is 50 ohms. Does that neccessarily mean it is bad?
I checked the canister purge control valve, and if I blow into the B port air comes out the C port, with no vacuum on A. I assume that means it is bad? If I apply vacuum it flows better, with no vacuum it leaks. Looks like it s $70 +/-.

 

I was getting P1445 and sometimes P1777. When I took the EVAP canister purge volume control valve off the car, I could shake little black particles out of it. The particles were also in the EVAP canister purge control valve, but no surprise since the two are connected together.

Turns out the particles were from the EVAP canister which uses carbon to filter the fumes from the gas tank. The carbon particles aren't supposed to come out of the canister but they were getting in the valves and preventing them from working correctly.

So pull off one of the two valves and see if you have particles in them. If you do, besides replacing the charcoal canister, you will have to blow out the metal tube that runs from the canister in the rear to the volume control valve (the one you sested) as well. The EVAP canister is behind the driver's side rear wheel and was only about $35 from the dealer.

 

I checked that yesterday as well, blew the line out. No sign of charcoal.

 

is the stepper motor the one control valve that's by the IAVC? The one that's connected to the UIM by the two hoses that's the larger from the tiny cylndrical black top container? I tried testing it with the on/off ignition test and I did not see the shaft (no homo) moving in or out. Is it supposed to work that way? Cause if so, I think mine might be bad, and I have a smog test coming up, which is why I ask for help. Thanks beforehand!!!

 

See attached diagram. When you first turn the ignition on, you should be able to hear it moving, for few seconds.
I replaced the valve that controls it (Purge cut valve in this diagram), and for now my light is off...
Probably just jinksed myself.

 

Do you know which of two systems from diagram was used when? I am chasing an EVAP issue (gettting a P0446 code) and trying to figure out what to replace first.

 

Mine is a 96 and figure 2 applies to it. I think Figure 2 is 96 and later.

You guys might want to find the FSM for your year on this site and download it. I did that several years ago, not sure where it is or the link to it.

The links are in Fallenone's signature:

http://forums.maxima.org/member.php?u=81096

 

Well, I still have the code.
No charcoal in the lines, the stepper motor moves just fine. What do I check next???
With the code cleared, I get vacuum on the control valve, get vacuum on the line from the canister through the control valve, through the stepper valve. When the code sets, no vacuum on the control valve.

I'm stumped. If the stepper valve is working (IE: it moves) can it still not be working correctly and throw the code?

Checked the harness, continuity to the ECM, no problems found.

 

Physically check the Vacuum Cut Valve on a bracket back near the cannister. Has 4 vacuum lines hooked to it. One of the plastic nipples was broken on mine; it was throwing P0440 and P0446 codes. I replaced that and the VCV Bypass Valve, since both were on the same bracket I pulled from JY.

 

it checked out fine.

 

Even though the purge volume control valve checked out okay, and moved when it was supposed to, I finally went to the salvage yard and got a used unit for $8. Put it on, the code is gone.

 

great posts iam working my max 1996 i have a haynes manual it did not show me all that much but the info i found here will help alot

 

if any one has the factory specs on testing all the evap components i would appreciate it thanks.i went to Nissan bough a evap vol control valve $115, put it on did not fix the problem

 

You can get the FSM for free. Check member FallenOne signature for link.

Has everything you will need to go through the system. They can be a real pain to solve.

 

check your purge, swap out the metal purge for the one inside a 97-99. its a small black one that is simple to clean