Dud Z32 Afm?

[Stevoss]

i bought a brand new z32 afm from my local Efi specialist and after wiring it as per the diagrams

a) empty

b) signal to ecu

c) ground

d) ground

e)12v

f) empty

i installed it and plugged in. switched to the reds ignition connected up the laptop and clicked consult on the nistune, looked at the afm voltage and i am getting 3.079v without having the car even switched on, i was thinking that it still should be reading about 0.5v even though it has a higher resolution???

Dodgy z32 afm ?

part # 22680 30p00 a36-000 n62

7z15a unisia jecs corporation made in Japan

Genuine Bosch. hmm any ideas?

[rob82]

i bought a brand new z32 afm from my local Efi specialist and after wiring it as per the diagrams

a) empty

b) signal to ecu

c) ground

d) ground

e)12v

f) empty

i installed it and plugged in. switched to the reds ignition connected up the laptop and clicked consult on the nistune, looked at the afm voltage and i am getting 3.079v without having the car even switched on, i was thinking that it still should be reading about 0.5v even though it has a higher resolution???

Dodgy z32 afm ?

part # 22680 30p00 a36-000 n62

7z15a unisia jecs corporation made in Japan

Genuine Bosch. hmm any ideas?

Did you wire it with the designation on the plug or on the afm? It's been a while since I've done one but I'm pretty sure the plug designation is reversed

From the afm designation.

[Stevoss]

found a thread on ns.com with the same problem have sent him a pm and hope to get a response.

http://www.nissansilvia.com/forums/index.php?showtopic=434324

also checked out to make sure i am getting 12v and earth at both pins on the car.

resistance of the afm between pins is as follows

5.390kohms Signal - ground

0.2ohms ground - ground

12.60kohms 12v - ground

18.25kohms 12v - signal

http://300zx-twinturbo.com/cgi-bin/manual.cgi?list=efec&dir=&config=&refresh=&slide=111&cycle=off&scale=0&design=default&total=190

had a look at that i am going to check for continuity from the ecu to the pin b, i dont know why that would be a problems as i have the standard 1 on the same circuit and no problems. i datalogged while trying to blow on the element and it didnt make any difference to the voltage on nistune.

[Stevoss]

Did you wire it with the designation on the plug or on the afm? It's been a while since I've done one but I'm pretty sure the plug designation is reversed

From the afm designation.

i will check that now, it makes sense.

[Stevoss]

Thank you very much rob82 you were exactly right, Noob Mistake, i worked it out it was the 2 pins 12v and signal were connected wrong, i was looking at the plug when wiring but should have been looking at the afm, swapped them around and bingo 0.52v at idle, doesnt matter with the 2 inner pins as they are both earths.

hope this thread helps someone else out if they come across this problem.

[rob82]

Thank you very much rob82 you were exactly right, Noob Mistake, i worked it out it was the 2 pins 12v and signal were connected wrong, i was looking at the plug when wiring but should have been looking at the afm, swapped them around and bingo 0.52v at idle, doesnt matter with the 2 inner pins as they are both earths.

hope this thread helps someone else out if they come across this problem.

Good stuff - happy to help.