I bought a new throttle body, and when I went to remove my TPS sensor I found that the bolts were not normal bolts. Rather then dremel them and all that good stuff I just bought a new TPS (JDM) to match up with my JDM ECU. Now I have done tons of reading through old posts and learned lots of things. However one thing everyone suggests is checking the voltages, they should be .45 at idle and 4.5 at full throttle. My question is where the hell do I stick the multimeter probes to test the voltages? I read in post that the ignition should be turned (car not started though) and then I measure the voltages, but how?

 

there are 3 wires. one will read ground one will read 12 volts and the other one will move voltage when you move the throttle.

 

Yeah but where do I stick the probe to measure it? the wires are insulated at the ends that go to the socket. So where do the probes go?

 

I have read so many posts where pople talk about what you need to do, however no one ever mentions how to test the wire, please someone has to know...

What if I wrapped a peice of wire around the male end of the plug (Obviously only the tps sensor wire) so that it extended out of the socket and I could probe it. Then when I had it set and screwed in I could take the plug off and remove the wire. Also if I have the car turned on and the engine off will it "flood" the engine if I keep pressing on the gas pedal while I am trying to adjust the TPS?


Modified by g2tegsown at 8:45 AM 6/9/2007

 

Generally the signal wire is the middle wire. you can probe the middle wire with the key on and see if it has about .5 volts then if it does open the throttle all the way and see if it has 4.5 volts approx. If it does chances are the TPS is ok. if not then you could have a short in the wire or a bad TPS. you wont flood the engine by doing this. if the tps needs to be adjusted make the voltage .45-.5 volts at closed throttle.


Modified by omniman at 7:12 PM 6/9/2007

 

Ok there are 2 parts involved here the actual TPS and the connector that is part of the harness. I am adding a TPS not becaus eof a problem, but because I am doing a total Throttle body swap (TPS, MAP, and Throttle Body). What I don't understand is where do I stick the red test lead? Where do I physically put the red test lead? Am I measuring the socket side? or the TPS side? Does the TPS istself change the voltage of the wire? If not then why am I measuring the voltage? Isn't the wire going to send the same current no matter what? Or does the TPS actually draw more electricity when it turns?

 

The easiest way I've found to check TPS signal is this:

I depinned the two outer wires.

Once depinned, the rubber insulator can be spun and pulled on and it will slide out of the crimp.

Repin and put back on TPS

Insert probes into the two outer (I think...) slots where the rubber insulator has been removed.

Adjust as necessary, depin again, spin the rubber insulator back onto the pin and reinsert.

BTW to depin, I just used the probe of one of those testing light things to push down on the lil plastic foot that holds the pin in place and then the pin slid out.

The red and black probes don't matter where they go, you're just measuring the difference in voltage output from the sensor, direction doesn't matter.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by omniman &raquo;</TD></TR><TR><TD CLASS="quote">Generally the signal wire is the middle wire. you can probe the middle wire with the key on and see if it has about .5 volts then if it does open the throttle all the way and see if it has 4.5 volts approx. If it does chances are the TPS is ok. if not then you could have a short in the wire or a bad TPS. you wont flood the engine by doing this. if the tps needs to be adjusted make the voltage .45-.5 volts at closed throttle.


Modified by omniman at 7:12 PM 6/9/2007</TD></TR></TABLE>

hey
i measured my tps today and i got .55volts..... Is this acceptable?
i have a surging idle