Automotive Forums .com - the leading automotive community online! Automotive Forums .com - the leading automotive community online!
Automotive Forums .com - the leading automotive community online! 
-
Latest | 0 Rplys
Go Back   Automotive Forums .com Car Chat > Engineering/Technical
Engineering/Technical Ask technical questions about cars. Do you know how a car engine works?
Reply Show Printable Version Show Printable Version | Email this Page Email this Page | Subscription Subscribe to this Thread
 
Thread Tools
Old 12-14-2015, 07:48 PM   #1
lahiruchandima
AF Newbie
 
Join Date: Apr 2014
Location: colombo
Posts: 20
Thanks: 10
Thanked 0 Times in 0 Posts
How to trigger an idle throttle position re-learn?

Hi,

My Toyota Vitz 2007 idles roughly and I got advice to clean the throttle body and make the vehicle re-learn the idle by starting the engine and let it idle for some time.
Is it necessary to instruct the vehicle in some way (disconnecting the battery may be) to start re-learning? Or does it keep relearning always so that it is unnecessary to trigger it?
lahiruchandima is offline   Reply With Quote
Old 12-14-2015, 11:32 PM   #2
Black Lotus
AF Regular
 
Black Lotus's Avatar
 
Join Date: Oct 2004
Location: Anywhere, Washington
Posts: 398
Thanks: 0
Thanked 36 Times in 33 Posts
Re: How to trigger an idle throttle position re-learn?

If the battery is disconnected, all my cars all need to have throttle depressed slowly to the floor once or twice, just after the ignition key is turned on. Then the key key is turned off. This resets the idle air control to a default position.
Then you start the car and let it idle, and let it do its own thing. It is necessary to turn the air-con on (make sure the compressor engages), then off, every so often to let the computer learn how much more the idle air needs to open and close down to compensate for the air-con.
Then you have to drive them down the road so they learn they learn a driving neutral position-- well two out of three on that one.
As far as I know, all my 3 computers go thru a certain idle speed learning period, then stop learning. They're always correcting for fuel air ratios.
None of my cars are Toyotas, so your car may be entirely different.
Just sayin'.
If you can't get a better answer on this forum, try a Toyota specific one.
Black Lotus is offline   Reply With Quote
The Following User Says Thank You to Black Lotus For This Useful Post:
lahiruchandima (12-14-2015)
 
Reply

POST REPLY TO THIS THREAD

Go Back   Automotive Forums .com Car Chat > Engineering/Technical

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -5. The time now is 06:25 AM.

Community Participation Guidelines | How to use your User Control Panel

Powered by: vBulletin | Copyright Jelsoft Enterprises Ltd.
 
 
no new posts