I'm wiring a 4-wire 02 Sensor directly to the ecu.

The directions tell me to:

Wire the White Wire to D14
Wire the Black Wire to A6
Wire the Green Wire to D22
Wire the Black Wire to A25 or B1

Does is matter where the black wires go? Are they specific to a certain pin location? Help.

 

Black wire is the ECU ground. It doesn't matter at all, but I would definitely splice into the A25 or B1. The way it's wired from factory is to the pin-outs of the ECU.

make sense?

HTH.

 

Kinda. But there are 2 black wires. So what your saying is that it makes no difference where to black wires go. As long as one hits the A6 pin, and as long as one hits the b1 or A25 pin.

 

Nope, doesn't matter. They both provide a grounding to the sensor.

Only ones that matter is one goes to the Heater control and you have a ground for it.


Here's wiring it more detailed:

WHT wire goes to D14 which is O2 Sensor Input (needs to be a shielded wire with ground)
BLK wire goes to A6 which is Heater Control
GRN wire goes to D22 which is Sensor Ground
BLK wire goes to B1 or A25 which is Sensor voltage

Hope that helps

 

 

Damn good pic

 

when i got my 00 b18c1 w/ harness the harness had a green wire that was cut, the motor was in a 94 si and i am putting it in my 94 cx...i thought that it'd be safe to soder it so i did...could this have been for the o2 sensor?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by poison &raquo;</TD></TR><TR><TD CLASS="quote">Black wire is the ECU ground. It doesn't matter at all, but I would definitely splice into the A25 or B1. The way it's wired from factory is to the pin-outs of the ECU.

make sense?

HTH.</TD></TR></TABLE>

thanks a million. my dillema is that my car came with the 02 wires cut between the sensor and the female plug [pretty stupid. could've just unplugged the sensor ]. i didnt know whether or not the two black wires mattered. and kataku thats an awesome pic