This is how to wire in a A'PEXi S-AFC onto a 1.6L SOHC MX-3 wiring harness.
Red Wire - Power
Green Wire - RPM Signal
Gray Wire - Throttle Signal
Brown Wire - Ground
Black Wire - Ground
Yellow Wire - Air Flow Signal Output
White Wire - Air Flow Signal Input
Blue Wire - used for 300ZX
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Red Wire - 12v Source
Green Wire - 2E
Gray Wire - 2L
Brown Wire - 2C(Closer to ECU)
Black Wire - 2C(1cm Away From Black Wire)
Yellow Wire - 2O(Wire Coming From ECU)
White Wire - 2O(Wire Coming From Harness)
Blue Wire - 2N(Reads 02 Voltage)
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Green Wire - 2E - White
Gray Wire - 2L - Light Green with White Stripe
Brown Wire - 2C - Black with Light Green Stripe
Black Wire - Same but 1cm Further Away
Yellow Wire - 2O - Red
White Wire - 2O - Red
The Red Wire on the S-AFC harness can go to 1B which is a power wire.
If you don't have the service manual this is how the connecters are arranged:
2Y 2W 2U 2S 2Q 2O 2M 2K 2I 2G 2E 2C 2A
2Z 2X 2V 2T 2R 2P 2N 2L 2J 2H 2F 2D 2B
1U 1S 1Q 1O 1M 1K 1I 1G 1E 1C 1A
1V 1T 1R 1P 1N 1L 1J 1H 1F 1D 1B
Plug 1 is closer to the firewall while plug 2 is closer to the center console.
DISCLAIMER: In no way am I responsible for your screw up. If you have any doubts, you should consult your genuine Mazda shop manual or have your Mazda dealer photocopy the appropriate pages from the wiring manual. Once wired up, you will need to tune your car. I can offer tips but again, it is your ass. This device will either help your car or blow your engine up, what you do will result in one of those outcomes. Choose wisely.
Thanks Maldo
