443 is purge valve test but is dumb as brick
the tank must hold pressure so any purge test one must
check pressure first. and if good then open the purge and see it drop
if no drop fails.
my guess is that it sees either of 2 pressure test wrong, 433 fails.
there is gross fail test DTC too. I think 433 is minor leak. like loose cap, would do. this is all tricky FIRMWARE testing in the ECU. poorly documented.
im going to look on 96 chapter 4 for 443 details now.
page 10 here
part 4 here, 443 section , and below the PDF below is 2nd coverage on this EVAP2 system.
http://ge.tt/6gvplbp2
the steps is does to do the actual test is not stated clearly at all, only the most vague.
but the tests are good. in the test logic table there.
the whole thing is here. suz 96
https://fixkick.com/sensors/EVAP/EVAP96.pdf
the tank must hold pressure so any purge test one must
check pressure first. and if good then open the purge and see it drop
if no drop fails.
my guess is that it sees either of 2 pressure test wrong, 433 fails.
there is gross fail test DTC too. I think 433 is minor leak. like loose cap, would do. this is all tricky FIRMWARE testing in the ECU. poorly documented.
im going to look on 96 chapter 4 for 443 details now.
page 10 here
part 4 here, 443 section , and below the PDF below is 2nd coverage on this EVAP2 system.
http://ge.tt/6gvplbp2
the steps is does to do the actual test is not stated clearly at all, only the most vague.
but the tests are good. in the test logic table there.
the whole thing is here. suz 96
https://fixkick.com/sensors/EVAP/EVAP96.pdf
http://www.fixkick.com