how do i do the throttle body relearn procedure???
New Member
Joined: Aug 2012
Posts: 201
Likes: 2
From: Yarmouth, Nova Scotia, Canada
New Member
Joined: Aug 2012
Posts: 201
Likes: 2
From: Yarmouth, Nova Scotia, Canada
New Member
Joined: May 2009
Posts: 211
Likes: 3
From: Columbus, Ohio
Accelerator Pedal Released Position Learning
Without CONSULT-II
NOTE:
It is better to count the time accurately with a clock.
It is impossible to switch the diagnostic mode when an accelerator pedal position sensor circuit has a malfunction.
1. Perform EC-42, "Accelerator Pedal Released Position Learning" .
2. Perform EC-42, "Throttle Valve Closed Position Learning" .
3. Start engine and warm it up to normal operating temperature.
4. Check that all items listed under the topic PREPARATION (previously mentioned) are in good order.
5. Turn ignition switch OFF and wait at least 10 seconds.
6. Confirm that accelerator pedal is fully released, turn ignition switch ON and wait 3 seconds.
7. Repeat the following procedure quickly five times within 5 seconds.
a. Fully depress the accelerator pedal.
b. Fully release the accelerator pedal.
8. Wait 7 seconds, fully depress the accelerator pedal and keep it for approx. 20 seconds until the MIL stops blinking and turned ON.
9. Fully release the accelerator pedal within 3 seconds after the MIL turned ON.
10. Start engine and let it idle.
11. Wait 20 seconds.
12. Rev up the engine two or three times and make sure that idle speed and ignition timing are within the specifications.
13. If idle speed and ignition timing are not within the specification, Idle Air Volume Learning will not be carried out successfully. In this case, find the cause of the incident by referring to the DIAGNOSTIC PROCEDURE below.
Without CONSULT-II
NOTE:
It is better to count the time accurately with a clock.
It is impossible to switch the diagnostic mode when an accelerator pedal position sensor circuit has a malfunction.
1. Perform EC-42, "Accelerator Pedal Released Position Learning" .
2. Perform EC-42, "Throttle Valve Closed Position Learning" .
3. Start engine and warm it up to normal operating temperature.
4. Check that all items listed under the topic PREPARATION (previously mentioned) are in good order.
5. Turn ignition switch OFF and wait at least 10 seconds.
6. Confirm that accelerator pedal is fully released, turn ignition switch ON and wait 3 seconds.
7. Repeat the following procedure quickly five times within 5 seconds.
a. Fully depress the accelerator pedal.
b. Fully release the accelerator pedal.
8. Wait 7 seconds, fully depress the accelerator pedal and keep it for approx. 20 seconds until the MIL stops blinking and turned ON.
9. Fully release the accelerator pedal within 3 seconds after the MIL turned ON.
10. Start engine and let it idle.
11. Wait 20 seconds.
12. Rev up the engine two or three times and make sure that idle speed and ignition timing are within the specifications.
13. If idle speed and ignition timing are not within the specification, Idle Air Volume Learning will not be carried out successfully. In this case, find the cause of the incident by referring to the DIAGNOSTIC PROCEDURE below.
I follow the appropriate procedure but my MIL never blinks. What am I doing wrong here?
Last edited by I DTW I; Jun 24, 2015 at 05:27 PM.
New Member
Joined: May 2009
Posts: 211
Likes: 3
From: Columbus, Ohio
On the 11th try I got the MIL to blink, followed the final steps and yes perfect idle!!!!
I drove it for the first time in a month, came back and restarted it to make sure it still idled well but it went right back to idle at 1,000 rpm! Argh
Why?
So I followed the reset procedure again and successfully reset the idle. This time, I drove around for a good 15 minutes, pausing many times to idle so it'd hopefully remember it.
Get home and restart it and it's right back at 1,000 rpm. Why does the car forget the proper idle every restart?
I drove it for the first time in a month, came back and restarted it to make sure it still idled well but it went right back to idle at 1,000 rpm! Argh
Why?So I followed the reset procedure again and successfully reset the idle. This time, I drove around for a good 15 minutes, pausing many times to idle so it'd hopefully remember it.
Get home and restart it and it's right back at 1,000 rpm. Why does the car forget the proper idle every restart?
sorry.
Oh wait, yes i can!!!!
It's battery level. They're not kidding when they say turn everything off in the service manual.
Before you start, turn of everything, radio, fans, AC, anything, lights for doors. Try it all again, it'll save.
It's battery level. They're not kidding when they say turn everything off in the service manual.
Before you start, turn of everything, radio, fans, AC, anything, lights for doors. Try it all again, it'll save.
New Member
Joined: May 2009
Posts: 211
Likes: 3
From: Columbus, Ohio
Mods, can we add turning the blower motor, radio off and doors closed to the original directions that DaveZ#3 posted on the first page please?
Glad it worked (and that i could even remember it!)
The info is there in the instructions, it's just not as clear, most people will not realise their voltage will sag enough to fail this.
The info is there in the instructions, it's just not as clear, most people will not realise their voltage will sag enough to fail this.
Registered User
Joined: Apr 2016
Posts: 1
Likes: 0
From: Ireland
Great write up. My RPM dropped from 1000 to approx 600 - (not sure what each of the lower dashes on the rev counter indicate) after doing the relearn - you just know when something isn't right!
Just one point - I did the relearn procedure following accelerator and timing points however at the end I made the mistake of turning the ignition back to the off position rather than going from the ON position to starting the car - if you go back to the off position and then start the car the relearn will not have worked! Just a point I thought worth adding.
Just one point - I did the relearn procedure following accelerator and timing points however at the end I made the mistake of turning the ignition back to the off position rather than going from the ON position to starting the car - if you go back to the off position and then start the car the relearn will not have worked! Just a point I thought worth adding.
Registered User
Joined: May 2017
Posts: 2
Likes: 0
From: Miami fl
Hi i have a 2003 350z and I have the same problem the car start well but when it running a few miles it show down and it have serious problem to start, and when it running 40 m/h and I push the gas don't accelerate just go up slowly, I the computer said the cam and crank sensor I replaced and still the same problem i change the fuel pump and nothing happens I check MAF sensor it'll me crazy please any ideas I need help thanks
Hi i have a 2003 350z and I have the same problem the car start well but when it running a few miles it show down and it have serious problem to start, and when it running 40 m/h and I push the gas don't accelerate just go up slowly, I the computer said the cam and crank sensor I replaced and still the same problem i change the fuel pump and nothing happens I check MAF sensor it'll me crazy please any ideas I need help thanks
how many times are you going to ask the same question in a forum that is not for versa's? do you have a learning disability or something?
quick google search would have led you to a versa based forum, located here... now go away
http://www.nissanversaforums.com/
https://my350z.com/forum/maintenance...5797-idle.html
https://my350z.com/forum/maintenance...6025-idle.html
quick google search would have led you to a versa based forum, located here... now go away
http://www.nissanversaforums.com/
https://my350z.com/forum/maintenance...5797-idle.html
https://my350z.com/forum/maintenance...6025-idle.html