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Thread: Abnormal TPS values in Toyota corolla XLI 2012

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    Default Abnormal TPS values in Toyota corolla XLI 2012

    My car's throttle position sensor is registering 18.82% on engine off and only 81.17% on WOT. I believe it should be less than 5% on engine off/(no pressure on the accelerator while running) and should touch 100% on WOT. I can't find any repair/service manual for 2NZ-FE to know how to troubleshoot this problem.

    Is this just because of a dirty throttle body? Can I calibrate TPS or do I need a new one?

    Info on car:
    Mileage is about 26000km
    Car starts and runs normally.
    Once when I had just started the car, it died even when I had accelerator half way down. The engine light came on. I started the car again after a minute and it turned on fine and the engine light was gone. I checked for DTC but there were none.

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    Come on guys, it is eerily quiet!

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    Get your battery and charging system checked then report

    Oh and the values you see for tps in percentage are just reference values calculated by the ecu in my understanding, never seen a car's throttle sensor show 100 percent on obd scanner

    If you want to be sure check the resistance of the tps using a multimeter throughout the range; it should increase or decrease smoothly without missing any movement

    Then you turn the ignition on, and check the voltage between ground and output signal of the tps, voltage range is usually 0v to 5v (wot) but you gotta find a manual first




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    on Toyota's it is normal to had tps value on idle or engine off on 11% to 18%. And on WOT it hardly goes to maximum 80% to 85% max it is normal no need to calibrate it (there is no calibration in old NZ series) it come's with fixed type throttle sensor. But in your case it is totally normal as your Engine is ETCSi so no need of calibration. don't worry.

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    When it comes to voltages 0.5 Volts on Closed Throttle (10%) and 4.5 on WOT (90%) these are the ideal settings. What i think you need to adjust them. its common when you get your throttle body serviced.
    93 Accord CB7 (Sold) / 2005 CL7

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    Get your battery and charging system checked then report
    13.9 volts on engine running. 12.05 volts on engine off.

    Oh and the values you see for tps in percentage are just reference values calculated by the ecu in my understanding, never seen a car's throttle sensor show 100 percent on obd scanner
    There is also a relative throttle position sensor value given by the scanner. It shows 0 and then increases proportionally with the pressure on the accelerator

    If you want to be sure check the resistance of the tps using a multimeter throughout the range; it should increase or decrease smoothly without missing any movement
    I did check the voltage using the scanner. It increases and decreases gradually without any sudden changes

    I think what I really need is a service manual to be sure. There is also a CNG kit installed in this car and I don't know how much the installer tinkered with the intake system.

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    If Its Adjustable.....Adjust It........

    It Should Read 0-2% On Closed And 100% WOT

    SHowing 10%-15% On Idle Makes It Run RICH Also
    TOYOTA Sprinter 86- AE80 DOHC 20v'D TOYOTA Corolla 98- AE101 4AFE 16v

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    For Exact Checking And Adjusting Procedure..Refer To Service Manual ...You Will Find Readings To Check And Adjust It
    TOYOTA Sprinter 86- AE80 DOHC 20v'D TOYOTA Corolla 98- AE101 4AFE 16v

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    Anyone knows where I might get the 2NZ-FE service manual? I have searched a lot but it always turns out to be some site looking for click money.

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