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Old 07-28-2009, 09:03 AM   #1
jmac636
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maf wiring-sticky this

Nissan Airflow Meter Diagrams


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Here you can find out how to hook up other Nissan OEM airflow meters for your Nissan engine. I can't take credit for any of this info I've simply munged it all into one spot from trawling various forums, pages, docs etc. Kudos to the guys who have helped make this info available. Cubes, meggala, dr drift and some guys on one of the sr20 forums for the q45 info. Thanks

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Airflow Meter Found on Vehicle Label Wire colour vs Function Size Notes
CA18 AFM Nissan Silvia S13 Pin A - nothing / not needed
Pin B - +12v power
Pin C - ground
Pin D - air flow signal out 65mm
SR20 AFM Nissan S14/200SX Pin A - nothing / not needed
Pin B - +12v power
Pin C - ground
Pin D - air flow signal out 65mm
RB20 AFM Nissan Skyline R32 Wire A - Not Connected
Wire B - Signal
Wire C - 12v Ground
Wire D - Signal Ground
Wire E - 12v Power 80mm Same size and calabration as Rb25 AFM
RB25 AFM Series 1 Nissan Skyline R33 Series 1 Wire A - Not Connected
Wire B - Signal
Wire C - 12v Ground
Wire D - Signal Ground
Wire E - 12v Power 80mm Can be used on RB26 in twin form as an upgrade from the standard AFM's (ECU Change required)
RB25 AFM Series 2 Nissan Skyline R33 Series 2 White with Blue Trace - Ground
Orange with Black Trace- Signal
Black with White Trace - 12v Power
80mm Same size and calabration as Rb25 AFM
RB26 AFM Nissan Skyline GTR Twin Turbo ????????? 65mm Label is same colour as Z32. This is the smallest unit which is 65mm opening diameter. Is it very obvious which AFM is a Z32 and which is an RB26 from the phyiscal size, despite same colour label. The part no is A36-000 J70
RB26 NISMO AFM Nissan Skyline GTR Twin Turbo ????????? 65mm This AFM has the resolution of the Z32 but has the same size as the stock, so you can keep the same piping, air intake and tubing as stock. The part no is A36-000 J71.
Z32 AFM Nissan 300zx Twin Turbo Wire 1 - Not Connected
Wire 2 - Signal
Wire 3 - 12v Ground
Wire 4 - Signal Ground
Wire 5 - 12v Power
Wire 6 Not Connected 80mm Same size as RB20/RB25 but has higher calibration. Should be good for around 350rwkw. Perfect swap into Rb20/Rb25 as bolt pattern is identical and no change is required. RB30 AFM plug fits which can be had very cheaply from any nissan/holden wrecker
Q45 AFM Nissan Infiniti Q45 V8 Wire 1 (White) - Signal
Wire 2 (Black) - Ground
Wire 3 (White & Black --have seen red and black--) - 12v Power 90mm Higher calibration and larger diameter airflow meter. Has been known to go upto 450rwkw. The physical body of the unit is larger and it wont fit standard pod filte adapters or airboxes. It is just over 3.5" in diameter on the outside. The inside diameter is 3".

Here's the link also: http://paulr33.skylinesaustralia.com...er-wiring.html
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Last edited by jmac636; 07-28-2009 at 09:05 AM.
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Old 01-11-2011, 08:58 PM   #2
Gwar10
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good piece of info.
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