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Wiring To Ecu

airbox

By airbox,
in Four Door Family & Wagoneers

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airbox Contributor

airbox

Posted
Posted

I need some help please. I am fitting an SAFC to my series1 stagea awd. I have downloaded the instructions for fitting it but before I commit myself to baring wires etc I was hoping that someone could confirm I have the right wires! Is this right? The wiring colours at the ecu are:

power-black/white

ground-orange/blue

air flow-white/blue

throttle-red/blue

rpm-blue/white

Cheers

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KiwiRS4T Grand Master

KiwiRS4T

Posted
Posted

Do you have a pinout diagram?I believe pin 54 has the wire that you need to cut rather join in to.

These are the pins for the Jaycar fuel adjuster (a simple version of SAFC) I used to run so the cable colours will not apply to you:

Red = 12 volts + * Pin 31

Black = 12 volts - * Pin 32

Green = input from AFM * the cut wire that used to go to Pin 54

Black = output to ECU (where the AFM used to be connected)* Pin 54

Pinouts WGC34_Series_1_-_STAGEA_RB25DET_Auto_ECU_ translated.xls

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airbox Contributor

airbox

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checked and I did have the ground and airflow the wrong way. It is airflow-orange/blue and ground-white/blue. Also the rpm wire is blue/white and not black/white like in your diagram. That is if B=black and L=blue. Must be the right one though as it is in that pin position

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KiwiRS4T Grand Master

KiwiRS4T

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Posted

Yep colours may vary as the S1 had three different ecus and so three different looms. The pin numbers are probably more important. If you look there is a fairly wide choice of pins for the power and earth. You should check with a meter to ensure thjat you are using a switched source so that the SAFC is only live with the key on.

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airbox Contributor

airbox

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thanks mate. I have wired it up now as per the SAFC instructions. I used the power supply that they suggested which is pin 67 which according to your pinout diagram is the control unit power supply and the earth I used is pin 55 which calls it the MAFS ground. Hopefully I have done it correctly!! I haven't plugged in the SAFC yet and the airflow signal I have left connected via a bullet (well spade actually) connector. I am hoping to get it set up tomorrow so all I have to do is plug in the SAFC and join the airflow connection to it.

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KiwiRS4T Grand Master

KiwiRS4T

Posted
Posted

The airflow signal wire should be cut so you should have two connections to make to it - the signal from the airflow meter goes into the safc (white wire) and the out put from the safc (yellow wire) goes to the other side of the cut wire which leads to the ecu. Note also their instruction that the brown earth wire needs to go closer to the ecu than the black earth wire. This is asuming that you have an SAFC II with the screen. If you have the simple SAFC with just the knobs then there is no brown earth wire to worry about.

Do you have a wideband afr meter or are you going to take it to a dyno for tuning?

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