How do i use this to adjust TPS.
Discussion
I need to adjust my TPS (throttle position Sensor)once i have found the wire with a varriation in voltage i need to set the TPS @ .6 when the trottle is completly closed,but how do i use this piece of equipment to set it.
Thanks.
[pic]http://i4.photobucket.com/albums/y114/LoTu5/2005_1005volt0001.jpg[/pic]
Thanks.
[pic]http://i4.photobucket.com/albums/y114/LoTu5/2005_1005volt0001.jpg[/pic]
The leads are in the right way, so just select Vdc on the dial in a range covering the expected voltage.
Get a paper clip and open it up, then carefully push it into the back of the TPS multiplug on the signal cable you've already found. Turn on the ignition, attach the red lead to the exposed section of the paper clip and the black probe to a good earth point.
You'll be able to read of the voltage on screen, and adjust the position of the switch until you have the desired output voltage.
Using the paper clip is a little fiddly, but a better option than stabbing through the cables insulation.
Get a paper clip and open it up, then carefully push it into the back of the TPS multiplug on the signal cable you've already found. Turn on the ignition, attach the red lead to the exposed section of the paper clip and the black probe to a good earth point.
You'll be able to read of the voltage on screen, and adjust the position of the switch until you have the desired output voltage.
Using the paper clip is a little fiddly, but a better option than stabbing through the cables insulation.
It's for checking current flow without learning to arc weld 
Or you could call it an inductive ammeter.
Out of interest, does the V scale go down to the voltage range you need?
It looks like it's more of an industrial set up as opposed to an automotive meter. That current clamp is h000000000000000ge
Or you could call it an inductive ammeter.
Out of interest, does the V scale go down to the voltage range you need?
It looks like it's more of an industrial set up as opposed to an automotive meter. That current clamp is h000000000000000ge
nighthawk said:
http://i4.photobucket.com/albums/y114/LoTu5/2005_1005volt0001.jpg
Thats the link to the pic GreenV
Strange! why did the photo not get through?
nighthawk said:It would be more accurate to connect the Black lead to the return wire in the TPS plug.
...Turn on the ignition, attach the red lead to the exposed section of the paper clip and the black probe to a good earth point.
I've measured servo error voltages(on industrial machines) with this method and found "a good earth" to be anything up to 0.2 V different from the signal return wire. Doesn't sound like much but as a fraction of 0.6, 1/3 is quite an error.
Make sure you make a note of what the voltage was originally so that you can put it back if your fiddeling makes things worse.
Leo
leorest said:
...Turn on the ignition, attach the red lead to the exposed section of the paper clip and the black probe to a good earth point.
It would be more accurate to connect the Black lead to the return wire in the TPS plug.
I've measured servo error voltages(on industrial machines) with this method and found "a good earth" to be anything up to 0.2 V different from the signal return wire. Doesn't sound like much but as a fraction of 0.6, 1/3 is quite an error.
Make sure you make a note of what the voltage was originally so that you can put it back if your fiddeling makes things worse.
Leo
The TPS has been apart so ime starting from scratch,ive clamped the black lead to the earth on the battery to give a secure connection.
I have found one of the 3 wires that comes off the TPS to have tape wrapped around it,taken the tape off to find some exposed wire(i should imagine this is where a reading has been taken before) and putting the red probe on the wire i get a constant reading of 004,no matter what i do the reading doesnt change?
The meter is switched to DCV mode?
This is a bit of a guess but I'd say the three connections are supply, earth and output, with the supply being 5 volts (a very common voltage in digital systems). Digital multimeters usually have an error of +/-1 on the last digit. I'm guessing that your wire with the bit of tape on is the supply, not the output, and you're measuring 5 volts and the +/-1 error makes it come out as 4.
That meter is not really suitable for the job. It's a bit hard to see in the photo but it looks as if its only DC voltage range is 1000V. To set a level of 0.6V you need a meter that gives at least two decimal places, which with the usual meter displays means a 20V range (0.00V - 19.99V).
Even cheap digital meters are pretty accurate so a £5 meter from the local pikey shop should sort you out.
That meter is not really suitable for the job. It's a bit hard to see in the photo but it looks as if its only DC voltage range is 1000V. To set a level of 0.6V you need a meter that gives at least two decimal places, which with the usual meter displays means a 20V range (0.00V - 19.99V).
Even cheap digital meters are pretty accurate so a £5 meter from the local pikey shop should sort you out.
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