EFIE Wiring? Quest

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Ready to start wiring my 06 GM 3.5 I5 engine. Looking at schematics of wiring and wanting to take some sample readings with my meter under driving conditions. Wondering which signal wires to pick?...

These engine controls sensors are OBDII meaning 2- 02 sensors. Position one at the exhaust manifold (4 wire circuit) and position 2 further back in the exhaust pipe (4 wire circuit)...

Each ciruit position is the same wire layout except wire d...
a Ground
b High Signal
c Low Signal
*d Heater High Control on position 1 Heater low control on postion 2

Anyone have any experience with which is the one to tap?

Reasoning that I will need to tap into d on each to adjust high low balance of fuel mix ratio to ECN/PCM (Power Control Mod) but looking for expert opionins only

Thanks for looking
W

[pln4472]

[mr. peepers]

Normally the signal wire is gray. But, 2 of the wires should be identical in color - those are the heaters. Of the 2 remaining, one is usually stripped, the other ground. Shouldnt take long to get the correct wire.

[Redmeanie]

Exactly....4 Wires have the Heater + and - . Then the Signal + and -...What you are thinking about is a Wide Band 5 Wire O2 sensor.

I just posted the PDF D17 in my Sales posting in the Energy Forum. Just go there and print it out. It goes through the whole procedure on "How to determine which wire is which" its very easy....

Oh well here you go....I will post it here also for others:

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Thanks everyone

All,

Thanks for the valuable data...

Between this and a service manual schematic I should be good to go!

Then its time to decide wether or not I need to defeat the knock sensor on my intake sytem!

Blessings