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Torque Pro app and reading Wideband A/F sensors

Discussion in 'Technical Chat' started by Caligula, Jun 28, 2015.

  1. Jun 28, 2015 at 2:19 AM
    #1
    Caligula

    Caligula [OP] Well-Known Member

    Joined:
    Sep 14, 2010
    Member:
    #43228
    Messages:
    2,108
    Gender:
    Male
    Los Angeles, CA
    Vehicle:
    2000 Ext. Cab Prerunner 2.7L
    Ive been having some sluggish performance afflicting my Tacoma recently. Its 2000 2.7L Prerunner, later model with coil-on-plug and wideband upstream O2 sensor. A friend has my snap-on scanner, so i tried using a bluetooth adapter and Torque Pro on a Galaxy S4 to take a look at things.

    The status reports that the system is in closed loop. Though when looking at the sensor voltage, bank 1 sensor 1 reads steady at around .65v. I know wide band sensors are designed to maintain a 5v current, and it it the ECM that records the voltage drop from the change in polarity of that voltage, translating it into a + or - reading from 0.5v. In any case, i would expect something to be read from this, not just a steady current, unless Torque was reading the constant voltage from the ECU instead of the polarity change.

    Can anyone shed some light on this?

    Here are some screenshots. First from mild acceleration.
    2019.jpg

    Coasting
    201507.jpg

    Status display
    20150.jpg
     

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