Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
I thank you for the quick reponse! I will check out the wiring and see what I can find. If nothing is found, I will get back to you.
Your answer to my question was to look for a short between the ECM and the Throttle body . Well, so far I have not been able to fix the problem. What I did find
is there is a short that seems to exist or affect the left side tail lights. There is only the signal that works on the left side (drivers side), and no brake lights. All lights work ok on the passenger side, stop or brake, signal, and flashers or emergency. Obviously, there is a short somewhere. I could not say if your answer is the solution to my original problem, that is the P2101 error. I am still looking for the short, and it may take awhile. Which brings me to this question....why would the tailslights not work only on the drivers side, and everything is o.k. on the passenger side? Your answer to look for a short between the ECM and the throttle body affect the tail light operation only on the drivers side? Or does a short affect the whole or any part of the truck's operation, including tail-lights and engine?
Jimmy Kurnosoff here. Back to the original problem......I check the wiring from the valve body, and it checks out O.K., but the wiring leads to a componant being called the "Powertrain Control Module" or the PCM. Is the PCM the same as the ECM, (Electronic Control Module)? And if the wiring is O.K., what would be my next vocus point search area that would cause the P2101 error code? ( Throttle Actuator Motor rng check)
I looked in the book for the location of a ECM, but there is no reference of a ECM.
Thatr is why I ask if the PCM & ECM the same? I really do not know and need some help here.
I appreciate the correction on the recall, and for clearifying the the PCM & ECM. I was going nuts trying to find a ECM! Thank You! I will poke around the throttle assembly per your suggestion and see what can dig up. But it is a coincidence
for you to mention gravel......I have a gravel driveway, and so do others for I am in a country enviorment where gravel is common, and I think I see where you are going with it. So I'll check out a few things and let you know....O.K.? This may take a some time to check, but I will get back to you, and give a feedback upon completion of the problem.
Does your truck have a hitch?
Yes! I will need some, no, alot of guidance through this. I apologize for not being more savy minded on this. So I will take any assistance you are willing to give, and put up with my ignorance. But as I skimmed through the provided material, it would seem that I would need a test light, is this correct? If I do, I will need to take a ride to autozone and pick one up. Unless a digital multimeter would suffice. Do I need a test light?
A light will be needed. The multimeter is great for measuring voltage and resistance, but the light will be needed to verify the circuit can handle some amperage.
Yes, got the test light, I'm sorry for the time delay. Now where should I start?
I still have the throttle body on my desk. Should I reinstall it now or does it matter?
Ok. First, connect your test light to ground and test that it works by touching the positive of the battery. If it lights up, touch it to the small metal tabs at on the op of the ETC fuse in location 20 in the under hood fuse block. Test it with the key on, and the key off. Let me know. You only need to accept once. Every Time you accept, I get paid and you get billed. You have accepted 3 times, that means you will be billed 45. If you wish I will request a refund of 2 of the accepts as I only expect one accept.
O.K. here is what I got. On #21 fuse link with the key off there is juice in one of the pins, specifically, the pin that is closest to the headlight shows power with the key on or off . no difference.
Need fuse 20, The fuse is labeled ETC
Greetings and good morning!
Apparently we got cut off for I recieved a message that the site will continue this morning, so here I am, and in hope you have time and are here also. Are you there to pick up where we left off? You asked me to check the yellow & brown wires, well this is what I come up with......positioning the connector to where the yellow wire is at the top left with the connector facing me, and with the key on, there is only 2 places with power, counting from the yellow wire on the left, and counting to the right, the 3rd wire has power, and on the bottom row from the left is the 2nd pin or wire that has power, no other wires have any power to them,
including the yellow wire, which has no power.
Ok, the 2 wires that had power are 5 volt reference, that is good. Next Connect the clip of your test light the battery positive. Touch the light to the Yellow as you had it positioned before, in the top left, the upper left and the one to the immediate right of that. Only test on those 2 wires. HERE is a picture with the 2 circled.
Perfect. Ok. On those 2 wires, yellow and brown. Connect the test light back to ground, and with the ignition off, hold the light to the yellow wire, and turn the ignition on. The light should turn on and then go off. Repeat the same with the brown wire. The last picture was rotated 180 from your description. It is the wire colours that matter.
I think that is because of the PCM seeing that there is a fault. I would not worry about it. You only needed to test it once. I expect that if you go and test it now that it has been sitting for some time, it would work again. Either way, the fact that both wires did light the light for a moment shows the PCM is working. The next step is to check the connections and you have done that so that leaves the throttle body.
Is there a way to check the Throttle Body ? Like somehow connecting something to it to see if the plate opens up ?
No, not yet. I am still waiting for the throttle body housing, which should be in on 12-16-08. I hyad ordered it on 12/08/08, but due to bad weather, it was delayed
until the 16th. So, I have no choice but to wait. But, as soon as I get it and install it, I will definately get back to you, for I may need more assistance, but for now, it's the waiting game.
until the 16th. So, I have no choice but to wait. But, as soon as I get it and install it, I will definately get back to you, for I may need more assistance, but for now, it's the waiting game. I
until the 16th. So, I have no choice but to wait. But, as soon as I get it and install it, I will definately get back to you, for I may need more assistance, but for now, it's the waiting game. I will post a feedback at that time...O.K.?
Thank You for your interest. It shows me you are a pro, and a man of his word.
So until the 16th, have a good weekend.
<emCustomerHere again! We left off with me getting the Throttle Body Housing" as per your suggestion and installing it, and after walking me through the diagnostics, (which was a little tricky) I am happy to report the results of all the work put into this project was worth it, to say the the least.! It seems to run better than it did before the problem started! My hats offs to you. Thank You Very Much for the expert advice and your patience working with me, with your detailed step by step direction, it couldn't be any better! Not only did I get the truck running, I got the running better than before, and I learned a thing or two
on my truck, that I can use for future reference. Again, I Thank You for all of
your assistance in this matter. You can bet I will recommend this site if I hear of somebody who may be in need! Sincerely, XXXXX@XXXXXX.XXX