Finally back to Fixing 118 and 122 codes

[SuperG]

I have been on a long hiatus, but am now back to fixing my codes, which are 118 - Open in harness (ECT), faulty connection, faulty sensor, or faulty power train module (PCM or known as the computer) and 122 - TP sensor might not be seated properly (tighten down), damaged TP sensor, open harness, grounded harness, or damaged PCM.

From a previous post, Scott and Steve suggested I test the DFPE, ECT, and TP first with a multimeter. Here are the results so far:

The TP checked out at 5.15 VDC, the DPFE did not register, and I am about to check the ECT, if I can find it...

In the meantime, what does it mean that the TP checks out and the DPFE does not?

Thanks for all the help!

 

[projectSHO89]

"Did not register"??? It had to register something...

TPS @ 5.15 v? What/where you checking???

ECT identification has been posted. I posted a pic of it awhile back.

Steve

 

[SuperG]

DNR - 0 volts...

According to your post, 5 VDC was expected at the TPS, wasn't it? I tested it via your instructions...honest!

And I have the ECT location, just haven't looked for it under my hood, yet...

 

[projectSHO89]

Hehe!

You should be checking the TPS output at the center wire. It should vary from about 7/10-9/10 of a volt with the throttle closed (KOEO) and go up to about 4.5 to 5.0 vols with the throttle fully opened. If you are getting 5 V through the whole test, either the ground to the sensor is open or the sensor itself is open internally.

At the DPFE sensor, one wire is ground, one is supply, the third is the output. There should only be an oputput voltage when the DPFE sensor (assuming it is working) senses a difference in pressure/vacuum between the two test ports. The output voltage should be proportional to the difference in pressure/vacuum.

Steve