there are 3 wires on the lambda sensor on the downpipe, can i connect my afr meter wire direct to one of these? is so, which one?

thanks

ian

p.s. cant connect to ecu plug wire, as no-one has any idea which one to use, it is slightly different to impreza ecu, with G7 code on case. thanks.

 

If you do try and connect it, at the sensor end, you'll need to do it on the "loom" side of the connector. Lambda sensors use a very weird wire, that can't be soldered.

If you have some time, and a voltage meter, I would suggest tracing the lambda signal wire through. It won't take too long, and will give you a far more reliable signal.

Mark.

 

thanks mate

how would i trace the signal? i know to use a voltage tester on each wire of the ecu plug, but what signals should i look for?

would i put the tester on each wire, one at a time, and rev the engine a bit to see if the voltage increases, or does this voltage increase happen on other wires too, as i suspect? (afm signal for example).

an help really appreciated

ian

p.s. off tomorrow, so if i know the method, ill have time to do it.

 

Black wire from the sensor is the one you need. Wires are PTFE insulated to resist heat. This type of wire can be very difficult to connect to.
If the AFR fitting is temporary you could push a sewing needle down beside the wire into the connector (not the sensor). This is how it is done in a garage when using diagnostic tools. When the needle is removed the silicone rubber seal will return to it's original position.

 

Legacy is similar to pre 97 Impreza.

At the ECU Oxygen Sensor Pin is No. 6 on Connector B43.

Check out my home page (in my profile) & download the ECU pinout diagrams.

Cheers,

Chris

 

thanks again guys

chris, ill check your homepage now mate, thanks.

ian

 

thanks to you all for your help, got the prob sorted

chris, printed the pages off your site, conected it and it works fine

cheers

ian

 

Legacy, are you the fella that bought the AFR from my son?

If you are, glad it works ok, are you happy with it?

If you are not, glad it works.

Cheers, MD.