I think I fixed it ! (i made web page for it and how to make one better)
First, off, i tested on the bench, it is stuck at 1.5v. (just like in your car)
id not run it long range, not me,but would make spare. (if it works) an emergancy spare, but gorky gut a used one for 1/2 the china price.
(i assume, DD service not toy/hangerqueens or offroad (low range), or pulling stumps)
when i got it , I documented the wiring inside, then i finished the PCB schematic. (pen and paper then cad)
I found that someone (had to be factory) has the HOT wire on the wrong pins. (my guess is the pcb card is calibrated on a jig, 3 trims on resistors done.
then they put the pcb the body and ship it untested ! (nasty QA), the lid was thermal plastic sealed. (welded ) so is original from factory.
i put the wires, back correctly, see my new schematic. The air temp sensor now works and the hot wire, like magic. wired right.
and then used my vacuum cleaner (DIY flow bench), and got 3v , out, increased nicely from 1.5v, as i increased the air flow.
i tested all the parts in on the card and all checked out. (PCB means printed circuit card, as seen above ,3 layers too)
here is that schematic. rev 3.
See TP1 , yours was dead, but now it works great.
![[Image: schem1b.jpg]](http://www.fixkick.com/sensors/china-maf/schem1b.jpg)
warning, to readers.
dont spend $100 on this , it's junky.
it was not even cleaned (defluxed) after they "by hand" soldered it and that one part , see photo1 , the ugly part, this part sits, .001" from the power trace, almost shorted. horrid quality controls.!
and the power supply can blow up at any moment, due to poor design. (can be corrected easy , by adding a filter)
I suspect, (yah,think?) they never tested the final assembled product. zero QA. (the uP chip is pre-programmed before installation, good luck getting a unit with Suzuki tables in side. with zero QA.
QA is quality assurance , systems.
YMMV , (your maf may vary , LOL) YCMV, you clone may very , after all, just how may clones are there, or clone shops.?
if, using a CAI system , MOD, cold air insanity
make sure the MAF is not backwards, see arrow? on body.
with CAI it fits both ways, 2.75" O.D. but not on any stock car, as there WAS a mount preventing that.
and do not remove the screen, it's not a screen.
First, off, i tested on the bench, it is stuck at 1.5v. (just like in your car)
id not run it long range, not me,but would make spare. (if it works) an emergancy spare, but gorky gut a used one for 1/2 the china price.
(i assume, DD service not toy/hangerqueens or offroad (low range), or pulling stumps)
when i got it , I documented the wiring inside, then i finished the PCB schematic. (pen and paper then cad)
I found that someone (had to be factory) has the HOT wire on the wrong pins. (my guess is the pcb card is calibrated on a jig, 3 trims on resistors done.
then they put the pcb the body and ship it untested ! (nasty QA), the lid was thermal plastic sealed. (welded ) so is original from factory.
i put the wires, back correctly, see my new schematic. The air temp sensor now works and the hot wire, like magic. wired right.
and then used my vacuum cleaner (DIY flow bench), and got 3v , out, increased nicely from 1.5v, as i increased the air flow.
i tested all the parts in on the card and all checked out. (PCB means printed circuit card, as seen above ,3 layers too)
here is that schematic. rev 3.
See TP1 , yours was dead, but now it works great.
warning, to readers.
dont spend $100 on this , it's junky.
it was not even cleaned (defluxed) after they "by hand" soldered it and that one part , see photo1 , the ugly part, this part sits, .001" from the power trace, almost shorted. horrid quality controls.!
and the power supply can blow up at any moment, due to poor design. (can be corrected easy , by adding a filter)
I suspect, (yah,think?) they never tested the final assembled product. zero QA. (the uP chip is pre-programmed before installation, good luck getting a unit with Suzuki tables in side. with zero QA.
QA is quality assurance , systems.
YMMV , (your maf may vary , LOL) YCMV, you clone may very , after all, just how may clones are there, or clone shops.?
if, using a CAI system , MOD, cold air insanity
make sure the MAF is not backwards, see arrow? on body.
with CAI it fits both ways, 2.75" O.D. but not on any stock car, as there WAS a mount preventing that.
and do not remove the screen, it's not a screen.
http://www.fixkick.com