Re: TP sensor voltage

Jul 07, 2003 2 Replies

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Larry Hepinstall 23 years ago

Check it going from WOT to idle too. Dropouts on throttle lift can mess up the transmission lockup logic and makes it feel like bad shifting (auto trans).

LJH

95GT

>From: kickerscrt

>
> >I get a reading a .88 volts
> > Isn't it supposed to be closer to .98-1.0
>
> I usually set these at the .98 range
>
> The 4.15v is the reference voltage, the system uses 5v from the computer for
> the sensors.
> I would like to see that voltage just a hair higher however (4.15v) >
> slooooowly open the throttle body butterfly by hand while checking the voltage
> (return, ie .98) and whatch the voltage, it should be nice and smooth with no
> drops or dead spots on the meter.
>
>
> TIM -aka-
> snipped-for-privacy@AOL.COM
>
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Doug Turner 23 years ago

I've had the best luck, response by setting it to .99 volts, also if you check from idle to WOT and vice versa it should be smooth with no spikes or anything... Some test lights will be dim with the .99 and get brighter and vice cersva if you have the ability to use a Light on it make sure it never blinks and brightens/dims smoothly.

--Doug

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Jim Warman 23 years ago

A test light on a sensor circuit.... what an interesting concept. I'd be really surprised to see the PCM allow a high enough current flow to illuminate the test light...... aside from the fact that VREF wont be above

5 volts to start with... I certainly don't have any test lights that will illuminate at less than a volt no matter what the current potential may be.

-- Jim Warman snipped-for-privacy@telusplanet.net

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