Subaru OEM Wide band O2 sensor idea

[G3-TEG]

This question has kind of been on the back of my mind during this entire topic so I think I'll just go ahead and ask for peace of mind.

Is the wiring diagram/schematic to built an electonic unit to monitor the voltages from a WIDE BAND O2 the 'same' as the unit used on a NON-wide band O2?

If that is the case, then why can't we just use an off the shelf meter (Autometer, haltec etc) and just install a wide band O2 unit in the exhaust to wire it up to?

If I am mistaken, then I must ask, ArturboGSR - Is that schematic specific for the use with a wide band O2 sensor?

Anyone shed some light on that?

[FB]

My mind is drawing a blank, but I believe the
NSX one varies resistance across two wires...

Or was that current? I don't remember. I do know that it is NOT voltage, so you cannot just switch a normal heated one with a wide band. If I remember correctly, the wide-bands are 5-wire.

Mit

[12SecGSR]

wide band O2 sensors have at least 5 wires, some have 6... if the NSX O2 sensor is only aprox. $150, it is probably just a 4 wire like on our gsr's

[ArturboGSR98]

Thanks Zip for clearing that up.
As for the Schematic I posted it only has three wires +12v, Ground, and the varied voltaged from the O2 sensor. Meaning, then what do the other 5 or 6 wires that come off the Wide band O2 from the NSX or WRX?

If Im not mistaken, A O2 sensor is a Thermistor that varies resistance when heated and changes the voltage output according to Ohms Law.

G3, I had the same Idea of getting a Halmeter and hooking it up to the wide band O2. Now I dont know the exact out/imputs or how many wires are on the halmeter, but I think there are 3.
See if you can find out how many wires are on the O2 for the WRX. I can get the one for the Nsx. www.halmeter.com


art



[This message has been edited by ArturboGSR98 (edited April 24, 2001).]

[zip]

Hmmm...five wire AF, it may contain:

+12V for heater
GND for heater
+5V for the sensor
signal line
shielded ground for signal line

the six wire may contain:
+12V for heater
GND for heater
+5V for the sensor
negative sensor reference
signal line
shielded ground for signal line

Just guessing.


------------------
Mods

[This message has been edited by zip (edited April 24, 2001).]

[ArturboGSR98]

Zip, your guess is as good as mine. But that would make sense though.

Is Daly city in the Bay area?

art

[FB]

The NSX also uses wide-bands. They run about 130-160 bucks each. They do not vary voltage, though.

Mit

[G3-TEG]

Hmm ok, i'll see what i can dig up on the wide band O2 wiring.

In any case, I guess we're back to square one for making an electronic device to display the wide band O2 voltages in the car correct?

What do we do now? boohoo