Nissan Altima Forum banner

1 - 13 of 13 Posts

·
Registered
Joined
·
5 Posts
Discussion Starter #1
I recently cleaned my throttle body and went threw the PAIN of trying to relearn my idle through the step by step process. But its missleading, the 7th step says to start car after light goes off but never does. You actualy start car as soon as light stops blinking! Hope this helps somebody.

  1. ENGINE COLD
  2. Perform "Accelerator Pedal Released Position Learning" .
  3. Make sure that accelerator pedal is fully released.
  4. Turn ignition switch “ON” and wait at least 2 seconds.
  5. Turn ignition switch “OFF” wait at least 10 seconds.
  6. Turn ignition switch “ON” and wait at least 2 seconds.
  7. Turn ignition switch “OFF” wait at least 10 seconds.
  8. WAIT over 10 seconds before this next step.
  9. Perform "Throttle Valve Closed Position Learning" .
  10. Make sure that accelerator pedal is fully released.
  11. Turn ignition switch “ON”. WAIT EXACTLY ONE SECOND SHARP. Turn ignition switch “OFF”
  12. THEN wait at least 10 seconds.
  13. Make sure that throttle valve moves during above 10 seconds by confirming the operating sound. - Very hard to hear anything at all. Just believe this is happening by faith.
Now, here's the big change
  1. Start engine and warm it up to normal operating temperature.
AND RIDE YOUR CAR FOR AT LEAST 15 MINUTES, this will make for correct operating temperatures to happen within the engine for the following steps. Warming your car in the garage in the morning aparently does not cut it.


Check that all items listed under the topic “PREPARATION” (previously mentioned) are in good order.
  1. Turn ignition switch “OFF” and wait at least 10 seconds.
  2. Confirm that accelerator pedal is fully released, turn ignition switch “ON” and wait 3 seconds.
  3. Repeat the following procedure quickly five times within 5 seconds.
  4. Fully depress the accelerator pedal. Fully release the accelerator pedal.
  5. Wait 7 seconds
  6. Fully depress the accelerator pedal and keep it for approx. 20 seconds until the MIL stops blinking and turns ON.
  7. Fully release the accelerator pedal within 3 seconds after the MIL goes off. Start engine and let it idle. THE ENGINE MUST BE STARTED WITHIN THE 3 SECONDS AFTER IT STOPS BLINKING, THATS HOW THIS LIGHT GOES OFF. THE SERVICE MANUAL DOES NOT STATE THIS, BUT IF YOU LOOK AT THE DIAGRAM WHERE THE ENGINE LINE ON-OFF IS, IT CLEARLY SHOWS YOU SHOULD TURN IT ON WITHIN THESE THREE SECONDS.
This is where your engine will start to learn the correct idle settings

  1. Wait 20 seconds.
  2. Rev up the engine two or three times and make sure that idle speed and ignition timing are within the specifications.
 

·
Registered
Joined
·
220 Posts
Good Job Man, Hopefully this could help me.


  1. Perform "Accelerator Pedal Released Position Learning" .
  2. Perform "Throttle Valve Closed Position Learning" .
Can you direct me to those please.
 

·
Registered
Joined
·
5 Posts
Discussion Starter #3
Im not sure what you mean by directing me to those? But they are two seprate procedures. wait 10 seconds before you start the throttle valve closed position learning
 

·
Registered
Joined
·
1 Posts
Thank you, I will try it.

Q: If the battery is removed before parts are removed and connectors disconnected, then everything is restored before the battery is re-installed and connected, how does the ECM determine that anything is different ?
 

·
Registered
Joined
·
2 Posts
Thank you!! I had cleaned throttle body(opened butterfly valve and all) and replaced manifold and body gaskets on my sisters car then was experiencing high and surging idle. I struggled for hours until putting all my info together I reset the SES light then followed the above instructions EXACTLY it worked! Make sure on the final step to hold the pedal down for a full 20 seconds as I was impatient and it wasn't working until I did. Thanks again worked like a charm!!
 

·
Registered
Joined
·
21 Posts
Thanks a lot man.! I was tripping out when I cleaned my throttle body. I was making phone calls left and right... Until my buddy told me to do the relearn. So I did it and idle was still acting and I was about to give up and take it to a dealer. But as soon as I did the last step and switched it from park to drive the rpms dropped and the idle became normal again, put it back on park and it worked like a charm .!
 

·
Registered
Joined
·
1 Posts
I've done this several times.........still bouncing between 1000 and 2000 rpm's at idle? DO I just keep repeating it until it works? Had the dealer try to reset it(they found a recall on the computer programing) they reinstalled the software on the computer, reset everything still wouldn't idle, they said maybe the Throttle body was bad, I returned and replaced it, still not working..
 

·
Registered
Joined
·
2 Posts
I've done this several times.........still bouncing between 1000 and 2000 rpm's at idle? DO I just keep repeating it until it works? Had the dealer try to reset it(they found a recall on the computer programing) they reinstalled the software on the computer, reset everything still wouldn't idle, they said maybe the Throttle body was bad, I returned and replaced it, still not working..


CarlK That's what I did, I had to do the process about a dozen times to get it right. The best advice I can give you is be patient and follow each step as precisely as you can. I used the stop watch on my phone, which helped. Good luck.
 

·
Registered
Joined
·
1 Posts
Gday, Just wanted to say that this procedure worked on my 2003 Nissan (Australian) Pulsar N16 with the QG18DE Series 2 (with the drive by wire throttle).

Cheers.
 

·
Registered
Joined
·
6 Posts
“preparation”

"Check that all items listed under the topic “PREPARATION” (previously mentioned) are in good order."
Ok i'm still fighting this relearn. Something that has been bothering me is the above line. I can not seem to find said “PREPARATION” list or whatever. plez put my mind at easy.
 

·
Registered
Joined
·
2 Posts
I tried this process maybe 10 times, and after pedal release relearn steps when I start the engine it revs up to about 2000 then dies. If I prod the pedal it will go to 2000 and above but when I let off it sputters/backfires and dies. Runs very rich. Plugs are sooty and exhaust is too. Before trying this relearn, I cleaned the tb by turning on the ignition and bricking the pedal, which held the butterfly open so I could spray it down and lightly brush it clean with a small acid brush. I saw that the butterfly would move in unison with the pedal position then. Now it doesn't. Have reset the ecm, and observed the throttle plate move during the relearn process, so the thing works via ecm signals. But it looks like the plate isn't opening enough to lean out the mixture while running. Any ideas?
 

·
Registered
Joined
·
1 Posts
I've done this several times.........still bouncing between 1000 and 2000 rpm's at idle? DO I just keep repeating it until it works? Had the dealer try to reset it(they found a recall on the computer programing) they reinstalled the software on the computer, reset everything still wouldn't idle, they said maybe the Throttle body was bad, I returned and replaced it, still not working..
Ever got it fixed?
 
1 - 13 of 13 Posts
Top