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Installed the safc 2 the other day. Pretty neat for what it is. But im trying to understand the sensor voltages. Sensor 1 reads avg. 1.5v
Sensor 2. Reads from .45v to 1.05v at wot. Assuming sensor 2 is 02 but what is sensor 1? Maf?
How do the voltages correspond with a/f ratios?
Only assuming higher voltages mean richer ratios. Wot
From 2000-3800 ish rpm voltage is at .75-.8v
After 4500 im up to .95-1.05v. Any insight would be great.
I have searched but cant find defintive answers regarding these cars in specific.
No but the cars ecu can read sensor outputs, and the safc can view some outputs... And this is what i am looking at while driving around. The ecu knows what to do with these voltage outputs from various sensors. Id like to know roughly what they mean.
Ive also read that an 02 sensor operated in the 0-1v range which would seem to correspond with sensor 2. Do you have an safc2 nmex?
Im going to home page options. Click ect./ sensor check/ then it shows voltages of 2 unnamed sensors.
Also the throttle sensor (in volts)/and the knock sensor readout.
The ecu must know what these voltages mean in order to adjust its fuel curve in closed loop. Im trying to learn what they mean just for a general idea of where my air fuel is at during wot.
Last edited by MuskokaMaxima; May 4, 2016 at 04:04 PM.
I know what your saying by showing me the pinout and safc install. but I'm just confused where these numbers are coming from.. i also have a scan tool than can read fuel trims and other stuff that id be able refer to if i knew what they ment lol.
Last edited by MuskokaMaxima; May 4, 2016 at 04:06 PM.
The SAFC2 can only read voltage inputs that you physically wire into the ECU harness. None of which are O2 sensor voltage inputs. So no you cannot see O2 voltages with SAFC2.
