Q45 Afm - Rb20 Afm

[jnr32r]

I need the wiring order for both these, from a search i did the Q45's wiring goes: (IGN-Signal-GND) but im not sure about the RB20.s shouldnt be too hard to figure out i think just havent had a look yet....

Thanks

[BigDatto]

You've pretty much answered your own Q, jnr.

Armed with a multimeter:

IGN will be bat. voltage

SIG will fluctuate according to airflow i.e. RPM

GND will short to the chassis.

should be easy to map the loom with your stock sensor.

Unless I have no idea WTF...

Hope that helps.

[jnr32r]

Didnt think about a multimeter, dah!

thanx BigDatto

[RedDrifter]

Go to www.rb20det.com as I think they have a diagram for the pinout on the rb20 AFM.

[jnr32r]

Still unsure about this one cos that diagram actully shows an extra "signal ground" does that have to be joined to the Q45 GND, would they be the same. In that diagram the look different ... ????

[Roy]

Still unsure about this one cos that diagram actully shows an extra "signal ground" does that have to be joined to the Q45 GND, would they be the same. In that diagram the look different ... ????

Ok the RB20 wires are:

Black with silver flashing - Earth

Orange/Blue - Signal Wire

Black/White - 12V Power

Blue/White - ECU Earth

One ground is thru the ECU the other direct to the chassis. At the moment as im using a Series II R33 AFM i only have the ECU earth wire connected, meaning the black with silver flashing wire is NOT connected to anything.

Do you know what the spades on the Q45 equate to?

[Roy]

If the Q45 AFM has an additional spade for a direct earth, then thats what the balck with silver flashing should be connected to.

But yeh if you can tell me how many spades the Q45 AFM has, and what they equate to, ill be able to tell you what goes where.

[predator]

Sorry: dumb question.. but with is the Q45 AFM ? Are you using this as a substitute for the Z32 AFM ? How much? I can do some rewiring if it comes to Z32 AFM time.. ~$300 for an AFM seems a little rich for a bit of plastic and a heat resistor..

[sidewaymambo]

I know there are only three wires from my Q45 AFM..weird..

[Roy]

Well if there is only 3 wires on the Q45 AFM then it is like the RB25 Series II AFM which aslo only has 3 wires.

You can be pretty sure (It is on my R32 RB20DET...can check with a multimeter) that the :

- black/white is 12V power,

- the orange/blue is the signal wire,

- blue white ECU earth

...and just leave the black with silver flashing.