evap code PO0443

[fixkick]

Hey Jerry, got up this morning and checked item 4 on your last post. I got engine to hot idle and pulled hose leading to the canister, there was no vacuum, pulled top hose from vsv to plenum and have good vacuum from intake, which is a good thing,


lol. I them back probed the vsv and have no voltage registering from it. I reset back probes several times to insure I was getting a connection. Still no voltage registering from vsv.
so the valve is commanded closed, i wonder why? ill look in the fSM to see the permissives,for that......


I now have dtc's reset and have car idling in drive. with vsv hose detached from the evap canister. trying to get a new code to pop or the same one. per your instructions. I am going to take it for a drive with scan tool attached, it may come up with better info if a code pops.

there are 2 conditions, one is normal, and the other is testing.
it says on page A132 the normal conditions, are hot motor, idling and driving, that valve is commanded open and sucks at the top of the canister.
the above is just normal actions, (eating fumes)
the does a test
the test rules arelive monitor rules) that trip the test off are way more complex.
coolant 158-230F
air sensor 15F to 158F (IAT sensor) im sure it is.
baro reading GREATER 75kpa (relative not absolute) 22inches HG mercury, vacuum I think they meant about 22inchs. not greater
I'm sure they are using a metric vacuum gauge here.
fuel tank above 15%
10seconds, above true

hark i found it, page 133 contradicts 132, step 3, hot engine at idle, VSV closed, then race motor and the valve opens and sucks.
use finger tip to feel this action with the hose removed.
the errors on page 132 im sure are japanese to English translations.
my guess, the at idle is closes to that you don't get funny idle , with huge fumes being sucked in, so keeps it closed. (normal ops)
but the test is done at idle in 10 seconds flat.
they , just open the valve for 10s at idle see the RPM BUMP and that bump passes the test. end test.
Toyota has some great books that explain all this 10times more clear than suzuki, and 100 times Geo books..

now you can do the hose test, at idle then 3000rpm , and you know the VSV is good. and ECU.

good luck you you.