Automobiles Forum banner
1 - 15 of 15 Posts

·
Registered
Joined
·
1,439 Posts
Discussion Starter · #1 ·
Hey all,

With the diving into tuning that I'm about to embark on, I think it'd make my life a LOT easier to hook my Zeitronix WB setup into my Ic so I can actually log my A/F ratios vs. trying to drive, watch the zeitronix readout and the fuel table on my laptop all at the same time.

After following the 034 pin out diagram and the Zeitronix manual, I hook up the output from the WBO2 to pin 1 (EGO 1+: Black/Red wire) on the ECU. I then hooked up the sensor ground from the Zeitronix unit to pin 16, (EGO 1 -: Grey/Red wire).

After doing that, I noticed that my lambda on the monitor page didn't change past .711, regardless of revving, etc.

So, did I wire it wrong? Is the Ic not compatable w/ the Zeitronix unit? Any BTDT?

Any help is much appreciated.

Thanks!
 

·
Registered
Joined
·
1,439 Posts
Discussion Starter · #3 ·
From the zeitronix manual, it's .15V (9.7 AFR) to 3.27V (21.2 AFR). Found on 2nd page: http://www.zeitronix.com/installation/Z ... ctions.pdf. There's a chart that maps it all out...

So would I adjust the upper and lower ranges in the the EGO/WB setup in the config file? I only noticed two values to change when selecting the wideband O2 setup, so not 100% sure if that's where I'd put this adjustment.

I tinkered with it a little yesterday, but after spending 2 hours in the 95* heat, I decided I had enough (and didn't want to upset the neighbors/police anymore w/ my lapping of the block w/o a muffler... heh). Also wasn't sure if I wired it correctly, but it looks like I did.
 

·
Registered
Joined
·
1,439 Posts
Discussion Starter · #5 ·
very good, thanks!

So by using my goggle converter, I'm coming up with .65 lambda (approximating that 0V = 9.5afr based on the remainder of the chart) to .75 lambda for the ~0V to 1V chart... will the ECU do the math for up to the 5V range that the zeitronix unit offers?

Thanks for the help! Much appreciated.
 

·
Registered
Joined
·
1,439 Posts
Discussion Starter · #7 ·
Sounds good. But if the wideband uses a 5V range vs. a 1V range in the ECU, will the ECU keep calculating the values up to the max lean (3.27V) reading?? Or is that not as important as the 1V range?

More curiosity than anything... thanks!
 

·
Registered
Joined
·
2,564 Posts
No, you must alter the output voltage so that it outputs in the 0 to 1v range.
The unit must be reconfigured.
If the unit can not be configured as such, you may use a resistor pair to attenuate the larger signal to
the required input range. You will need to calculate the equivalent lambda at the attenuated voltages.
 

·
Registered
Joined
·
1,439 Posts
Discussion Starter · #9 ·
ah, OK...

I'm assuming if I need a resistor, I'd need to put it b/n the PIN1 on the ECU and the WB02 output line coming from the computer, right? Any ideas on what sized resistor? I'm falling into my danger zone here, as my calculations for electronics is REALLY rusty (i.e. it's been almost 10 years, and it took me twice to go through my engineering electronics class... lol)... not to mention dangerous... ha.
 

·
Registered
Joined
·
1,439 Posts
Discussion Starter · #11 ·
I am going to call Zeitronix later this afternoon and see. As of right now, I'm not seeing any literature or manuals that show you how to do this. Obviously this would be the easier/better route so I don't have to figure out how to recalculate the AFR values in relation to the volts... again, entering danger zone for me :)

Will shoot you a PM if the system is unable to be converted.
 

·
Registered
Joined
·
2,564 Posts
Rocco16V said:
check out this page. Autronic only accepts 0-1v and tech edge's output is 0-5v so the issue is similar yours with the Zeitronix and 034. only we have more adjustability so we dont have to do a 10-1 divider but should do a 5-1 divider. so you will not use their resistor values.
http://wbo2.com/faqs/autronic.htm" onclick="window.open(this.href);return false;
I have been corresponding with jretal offline and I gave him the values of 2.26k and 1.00k 1% based on the zeitronix datasheet (reduces 0 to 3.26v to 0 to 1.00v).

This though would only be applicable to the zeitronix since it has a rather odd max voltage output.
 

·
Registered
Joined
·
1,439 Posts
Discussion Starter · #15 ·
yup... resistors have been ordered and should be showing up this week sometime. Then I can tinker and get everything wired up and see if the ECU sees the same values I see on the zeitronix readout screen.

Thanks again for the values!
 
1 - 15 of 15 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top