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TPS not reading.
Posted: Wed May 27, 2009 1:26 pm
by corso
I have a V2.2 board I upgraded with the MS2 daughter card and now the TPS sensor won't register. When I have the stim pluged in and turn the CLT knob back and forth, both the coolant gauge and throttle position gauge move. I have tried reloading the code and it still does the same thing. Any input would be great
Re: TPS not reading.
Posted: Thu May 28, 2009 5:20 am
by Matt Cramer
Check the voltage at the ADC input pins at the daughter card and see if they both move in response to one knob. Could be you have a stray bit of flux or solder blob shorting something together.
Re: TPS not reading.
Posted: Thu May 28, 2009 6:10 am
by corso
Which two pins? just want to make sure. And the board is clean.
Re: TPS not reading.
Posted: Thu May 28, 2009 7:10 am
by Matt Cramer
The pins on the U1 daughter card. TPS is pin 26, AD3-1. CLT is pin 25, AD2-1.
Re: TPS not reading.
Posted: Thu May 28, 2009 2:24 pm
by corso
CLT moves by itself, TPS dosen't move at all
Re: TPS not reading.
Posted: Thu May 28, 2009 7:08 pm
by corso
so what should I do next?
Re: TPS not reading.
Posted: Fri May 29, 2009 4:24 am
by Matt Cramer
Make sure it's getting a TPS voltage from the Stim.
Re: TPS not reading.
Posted: Fri May 29, 2009 5:51 am
by corso
yes, I get a reading off the stim
Re: TPS not reading.
Posted: Fri May 29, 2009 10:25 am
by Matt Cramer
Check the circuit and see where the voltage is disappearing.
Re: TPS not reading.
Posted: Fri May 29, 2009 10:48 am
by corso
when I touch the top of the daughter card with my finger,the TPS gauge bounces around
Re: TPS not reading.
Posted: Fri May 29, 2009 10:58 am
by corso
also, how do I go about checking the circuit?
Re: TPS not reading.
Posted: Fri May 29, 2009 12:10 pm
by Matt Cramer
Use a multimeter. Follow the voltage in from the DB37 connector, through the circuit here:
Find where it disappears.
Re: TPS not reading.
Posted: Fri May 29, 2009 2:08 pm
by corso
So I check at the R9 R5 and R2 and they all move on the multimeter.