o2 sim question

[x2xtreme360]

I have installed my O2 sim and have it working, but I have a question. There is one pin on the o2 sensor wiring that is left untouched.

http://www.3sx.com/installs/o2simulator/o2simulator-install-pic-wiring2.jpg

It is the heater ground

My question:

I installed the sim without the o2 sensors (because I didn't have them). I cut the stock connectors off and wired the sim up... but I LEFT the heater grounds connected to nothing (instead of it being connected if the o2 sensors were still attached). Is this going to throw the functionality off? I'm not sure where the heater grounds even go to. They showed no continuity to ground when I tested with my DMM, so I don't even think they're a ground at all. Someone please verify?

[x2xtreme360]

:bump: would like an answer to this question. The O2 heater code showed up:( The only thing I can think of here is that the O2 heater ground wire isn't connected to anything. Should this be grounded?

[HLxDrummer]

Did you get it from http://www.o2simulator.com/ ? I think they tell you within the site what your options are.

[x2xtreme360]

It doesn't matter. I grounded the heater wires just now and it didn't do anything. I'm so fucking sick of this OBDII shit.

[HLxDrummer]

http://www.o2simulator.com/doc/o2sim_installation_manual.pdf

[KeithMac]

I`d put a resistor between the heater +12v and heater ground wires, you need to find the resistance of the stock O2 heater coil and copy that with the resistor..

[mb7050]

I was just about to remove my secondary o2 sensors I´ll wait until you solve this out :)

[x2xtreme360]

Alright, this is what I wanted:


11. If you want to eliminate secondary o2sensor completely, you have to use our heater resistor (20 Ohm, 20 Watt) to simulate o2sensor heater element and avoid the P0141 (faulty o2 heater error code). Hook up heater resistor between 2 heater wires (usually same color): +12V and heater ground. One heater resistor for each o2sensor. Please be aware: Heater resistor will get hot, too hot to touch. Mount heater resistor in a location that keeps anything flammable or melt-able from touching it.

I will try this and see how it works.

[mb7050]

please share the outcome :)
thanks

[x2xtreme360]

I will keep my fingers crossed... that's two of four CELs I can cross off my list if all goes well.

[mb7050]

what are the two others ?

[x2xtreme360]

Damn EVAP and EGR. I attempted to hook up the EGR lines in the hybrid manner, since I'm pretty sure my solenoid is a hybrid solenoid for some reason.:confused: But to no avail, still get the CEL for it:(

[mb7050]

those bitches are hard to deal with

[HLxDrummer]

Eh just get an EMS and call it a day :p

[x2xtreme360]

And absolutely never be able to pass emissions? I don't think so:)

[x2xtreme360]

I've been busy with my car and haven't posted back on this.

I bought 2 20ohm20watt resistors to wire into each heater ground wire. It cured one of the o2 heater codes. So then I tried to eliminate one of the resistors and just wire both o2 heater wires to one resistor... same result.

Not quite sure what the deal is here. I suppose the next step is to splice the one heater signal wire at the ECU into the other signal wire at the ECU and see if that fixes it.

Just not sure why one went away and the other still remains.

[x2xtreme360]

OK.... nevermind the last post. I did some continuity testing with my DMM to find out what the issue is. Turns out I had the rear O2 heater wire mixed up with a different wire and it just simply wasn't connected at all. It's a bit confusing because the one O2 heater wire is black I believe... the other one is green/white. I realized my mistake when I noticed the wire at the ECU was green/white and had a "doh" moment. Swapped wires and the code is GONE.

This is only using one resistor too. The directions say you must use two resistors, but one of mine got trashed so I tried with the single resistor... worked just fine.