Kris503

I have a 90 Jeep Cherokee 4.0 Renix my tps is showing 0.00 output voltage, I am measuing in 20 DCV on my meter.

First off, is this the right setting for testing this?

and second if it is, then where should i start to get the output voltage i need?

Radi

Positive you are measuring the output wire and not the ground? Yes- you have the correct range (unless you have a 10VDC setting which might be more accurate), expected voltage is in the 1-5 VDC area.


Check all three wires. You should have +5V input, ground, and signal output.

BobF

I just put in a new TPS and it too shows no output in the b/c (output) connection with the key on. Shows 4.8v on the a/b (reference) connection.

So, tomorrow, I'm going to put the old TPS back in, and retest.

(you can test it in the running state, you should see voltage for sure, unless it's really busted).

cruiser54

Key on? Connector plugged in and you're backprobing it, right?

Do you have my instructions?

Kris503

Yes I have you instructions, im gonna recheck again after work.

and yes to all the above, the key was on, conector plugged in and I was backprobing first got my reference of 4.88, then I checked the output, but it showed 0.00.

BobF

Crusier54, I'm using yours also. I was not able to swap the old one in, and check it, will do tomorrow if it doesn't snow. As the OP stated, I too saw 0.0 on the output of the new TPS. Saw voltage on the old one. So, we'll see tomorrow.

cruiser54

Unless your backprobing isn't working on the output, it's gotta be the TPS.

Try this. Unplug the connector. Backprobe it with your meter set on Ohms. Touch the other lead to the pin inside the connector. If you get ) as a reading, then your backprobing is good. Plug it back together and continue with your testing.

BobF

I am slow no doubt. Well, we put the old one back in, and was able to I was able to read 4.8v on input, and adjusted output to .8v .

Tomorrow, I'm going to put the new one back in, and do it all over again.
(clue 42: Make sure the TPS 'tang' is under the TB mount)

cruiser54

Good "clue" there. LOL. You ain't the first and you won't be the last.

BobF

Well, I don't know about the OP, but I reinstalled the new TPS and initially got .3v, adjusted to .8v (with same ref 4.8v reading on input).

I hope the OP has some good luck also!
Thanks for the help.
Dylan