throttle body replacement re-learn procedure

I didn't think we could really do anything to our throttle bodies but they're so reliable they rarely get touched If they mess up in the code points to that I thought most people just changed out the throttle body they're plentiful rebuilt new or used I do believe there's not a lot to them. There's my assumption that you take the throttle body new used wherever you get it Mount it to the car plug it up boot the car up it's a ready mode and the temp to make the car start whatever it is you do backup out of your space a little bit or step on the gas and the engine comes on whatever it takes and if it starts and doesn't immediately die and act up and all of that stuff drive it around and see what happens should work just like it's supposed to I imagine I don't think there's any serious relearning The car will see the part I should know how to work it. And if not plug up the Toyota software run a health check and the stuff will pop up orange that it's not liking whether it's your throttle body or what have you I've had to put my factory throttle body on JDM engines because the JDM engines come in with the throttle bodies quite flooded and God knows what else I know mine's clean and was working before the engine blew so and it's a federal part versus the JDM part which I don't know if there's any difference or not All I know is it doesn't work as soon as I plug mine up all this well

 

The ECM will relearn the minimal throttle opening for starting and idling the engine. It does that within a minute or so of first starting.

In your situation, replacing an old throttle body with a new one, there probably won't be any issue. Sometimes people get no-start issues when they've disconnected the 12 V battery (ECM forgets learned throttle position and assumes new-throttle-body values) and their throttle body is old and gunked up.

In your case, you might want to disconnect the 12 V battery on purpose; having the ECM forget the learned value and assume new throttle body will probably work pretty well for your new throttle body.

You haven't mentioned the reason you're replacing the pedal assembly too. It's not as if they're bound to each other or anything.

 

My engine does that because of the hybrid battery. A couple cells are over and out of balance. So the car is trying to use power by revving the engine. That's coasting downhill or sitting at a light. I'm not even fully charged when that happens.
Otherwise I've also had my throttle door get stuck. Which put it into limp mode and barely drove. I pulled the throttle body and cleaned behind it and the manifold. Fixed that problem.

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Did the FTPR state a reason for the advice?

 

I was afraid of that. The tech just didn't know what's in this post, to wit:

The trouble code situation is very confusing. Codes P0120, P0121, P0122, P0123, P0220, P0222, P0223, and P2135 pertain to the throttle position sensor. Codes P2120, P2121, P2122, P2123, P2125, P2126, P2127, P2128, and P2138 pertain to the pedal position sensor.​

So P0122 is definitely a code about the throttle body sensor and nothing to do with the pedal. What confused the tech is that the fortune cookies for all of those codes all start with "throttle / pedal position sensor ..." because SAE picked that wording (P0 and P2 codes are all SAE standardized) and that's the wording baked into code scanner tools, so you still have to look the code up in the car's actual repair manual to find out if it's about the throttle body or about the pedal.

Well, you've got a nice new pedal now, anyway.