Ignition problem

[PKRWUD]

Originally posted by Mountain Main
I put a new fuse in my DMM and it works so I did a Throttle Position Sensor tests. I did all these tests while KOER.

I first was able to back probe into the wiring harness connector that is closes to the sensor. But I was only able to get a connection with the green wire, which is the name of TP SIG. I tested it from idle to WOT. It looks like 0-5 volts smoothly.

I then wasn't able to back probe the orange wire, which is the Voltage Reference wire. So I jumped the orange wires and also jumped the green wires. The orange wire is consistant 5 volts through out idle and WOT.

Finally I did the black wire, which is the Signal Return wire I measured the return from the sensor and received a constant 4 1/2 Volts through out idle to WOT. There was one time I received 4 1/2 to 5 1/2 Volts from idle to WOT.

What do you think PKRWUD? Is the TPS toast.

First off, this needs to be done at KOEO. The engine is not to be running. Second, what did you connect your other test lead to when you got those readings? It really doesn't matter, what I need to know is what the reading is when you attach your leads to the green and black wires at the same time. Connect your pos. lead to the green wire, and your neg lead to the black wire, and read the meter at idle through WOT. Your readings did not sound normal, because your green wire results should never be zero volts, and I don't understand what you connected to to recieve voltage through the black wire. Forget about about the orange wire for now, just tell me the voltage between the green and black, while going through the throttle range. The wires have to be hooked up, and the key on, but the engine off.