How to:ECU Reset,Throttle & Accelerator Position Learning

[titanic_081806]

i have a question on the steps, i am confused if you have to really TURN/CRANK the IGNITION ON or just put the key to ON position to the following steps below, i also want to know that if you say Turn ignition OFF, do you pull they key out of the ignition? Thank you for your response.


Accelerator Pedal Release Position Learning

Operation Procedure

1. Make sure that the accelerator pedal is fully released.
2. Turn ignition switch “ON” and wait at least 2 seconds.
3. Turn ignition switch “OFF” wait at least 10 seconds.
4. Turn ignition switch “ON” and wait at least 2 seconds.
5. Turn ignition switch “OFF” wait at least 10 seconds.

Throttle Valve Closed Position Learning

Operation Procedures

1. Make sure that accelerator pedal is fully released.
2. Turn ignition switch is “ON”.
3. Turn ignition switch is “OFF” wait at least 10 seconds.
Make sure that the throttle valve moves during above 10 seconds by confirming the operating sound.

Idle Air Volume Learning (Throttle Position Learning)

It is better to count the time accurately with a clock.

Operation Procedures

1. Perform “Accelerator Pedal Released Position Learning”.
2. Perform “Throttle Valve Closed Position Learning”.
3. Start engine and warm it up to normal operating temperature.
4. Turn ignition switch “OFF” and wait at least 10 seconds.
5. Conform that accelerator pedal is fully released, turn ignition switch “ON” and wait 3 seconds.
6. Repeat the following (steps 7a, 7b) procedures quickly five times within 5 seconds.
7a. Fully depress the accelerator pedal (HARD)
7b. Fully release the accelerator pedal.
8. Wait 7 seconds, fully depress the accelerator pedal and keep it for approx. 20 seconds until the Check Engine Light (CEL) stops blinking and turned ON.
9. Fully release the accelerator pedal within 3 seconds after the CEL is ON.
10. Start engine and let it idle.
11. Wait 20 seconds.
12. Rev up the engine two or three times and make sure the idle speed and ignition timing are within the specifications.

[fuRyTACO]

good info to have for the near future.

[hooligan]

Originally Posted by fuRyTACO

good info to have for the near future.

never know when you'll need it... i printed a copy and stuft it in mee glovebox!

[Leadsled124]

Originally Posted by titanic_081806

i have a question on the steps, i am confused if you have to really TURN/CRANK the IGNITION ON or just put the key to ON position to the following steps below, i also want to know that if you say Turn ignition OFF, do you pull they key out of the ignition? Thank you for your response.

-When it says turn the key to "on" position just turn it as far as you can go BEFORE the truck turns over.
- No you do not have to take the key out

[dancinbr]

Originally Posted by RockyMtnTitan

I came across this info a couple of months ago while cruising the 350Z section of the Technosquare site. With the exception of the ecu reset procedure, all the other procedures here are available in the Titan service manual. The ecu reset procedure in invaluabe, as it allows almost instant reset of the ecu's RAM instead of the usual method of disconnecting the battery and guessing as to how long you must leave it disconnected.

I think it's important to do the learning procedures periodically, as it basically recalibrates the electro-mechanical positioners, namely the throttle valve positioner and the accelerator pedal positioners. After some use, these things get a little out of whack, and get kinda lost. This can cause problems like loss of power and idle issues. This method restores the proper min/max position voltages that the ecu sees from them.

I, personally, have seen the best improvement in my engine by doing the full procedure, starting with the ecu reset, followed by the other procedures. In fact, after doing this, I got back some of my low end grunt I'd lost over the past months. I can actually catch a bit of rubber now, which I haven't been able to do for a long time! It also cured a slightly erratic idle I was having.

Give it a try, but be patient....it may take a couple (or more) tries with your stopwatch to get it right.....timing is extremely important here! (Edit: See newly added "Easy Method" below).

Note: Make sure engine is at operating temp and all electrical loads are turned off prior to doing the idle air volume learning. Don't think it matters for an ecu reset.

From Technosquare website:

Please read all instructions and be familiar with them before any attempts.
A stop watch or an analog clock with a second’s needle will be useful.

ECU Resetting Procedures

Timing is extremely critical. If it is NOT DONE within the specify time, the ECU will not reset and the Check Engine Light (CEL) will continue to remain ON. A stop watch or an analog clock with a second’s needle will be useful.

Operations Procedures

1. Confirm that accelerator pedal is fully released, turn ignition switch “ON” and wait 3 seconds.
2. Repeat the following steps (2a and 2b) procedures quickly five times within 5 seconds.
2a. Fully depress the accelerator pedal (HARD).
2b. Fully release the accelerator pedal.
3. Wait 7 seconds, fully depress the accelerator pedal and keep it for approx. 10 seconds until the CEL starts blinking.
4. Fully release the accelerator pedal (while the CEL is still blinking)
5. Wait about 10 second.
6. Fully depress the accelerator pedal and keep it for more than 10 seconds.
7. Fully release the accelerator pedal (The CEL light will continue to blink).
8. Turn ignition switch to “OFF” position and now you can start the car. The CEL light should be gone.
If the CEL light continues to remain ON, repeat the above steps. Timing is EXTREMELY critical to resetting the ECU.

Edit: Added the "Easy Method" for ECU Reset

The Easy Method:

After experimenting with different timing, and reading posts by other members, I've come up with a condensed method of doing this reset. This method works EVERY time, even w/o a stopwatch. I've used this method successfully a dozen times, or so, now w/o a watch. After a few times, you won't need a watch or instructions. You'll get so darn good at it, you'll find yourself doing it while waiting at a traffic light.

Timing is not as critical with this method...no stop watch needed. Just count in your head...one-one thousand, two-one thousand, etc, or use stop watch. The most critical step is step #3....wait 10 sec, instead of 7.

1. Ignition "ON", count to 3.
2. Depress/Release pedal 5 times...hard and fast.
3. Count to 10 (not 7!) and fully depress pedal
4. Count to 12 (SES should be blinking), release pedal
5. Count to 10, depress pedal
6. Count to 10, release pedal.
7. Turn off ignition, then start engine. Done!

Accelerator Pedal Release Position Learning

Operation Procedure

1. Make sure that the accelerator pedal is fully released.
2. Turn ignition switch “ON” and wait at least 2 seconds.
3. Turn ignition switch “OFF” wait at least 10 seconds.
4. Turn ignition switch “ON” and wait at least 2 seconds.
5. Turn ignition switch “OFF” wait at least 10 seconds.

Throttle Valve Closed Position Learning

Operation Procedures

1. Make sure that accelerator pedal is fully released.
2. Turn ignition switch is “ON”.
3. Turn ignition switch is “OFF” wait at least 10 seconds.
Make sure that the throttle valve moves during above 10 seconds by confirming the operating sound.

Idle Air Volume Learning (Throttle Position Learning)

It is better to count the time accurately with a clock.

Operation Procedures

1. Perform “Accelerator Pedal Released Position Learning”.
2. Perform “Throttle Valve Closed Position Learning”.
3. Start engine and warm it up to normal operating temperature.
4. Turn ignition switch “OFF” and wait at least 10 seconds.
5. Conform that accelerator pedal is fully released, turn ignition switch “ON” and wait 3 seconds.
6. Repeat the following (steps 7a, 7b) procedures quickly five times within 5 seconds.
7a. Fully depress the accelerator pedal (HARD)
7b. Fully release the accelerator pedal.
8. Wait 7 seconds, fully depress the accelerator pedal and keep it for approx. 20 seconds until the Check Engine Light (CEL) stops blinking and turned ON.
9. Fully release the accelerator pedal within 3 seconds after the CEL is ON.
10. Start engine and let it idle.
11. Wait 20 seconds.
12. Rev up the engine two or three times and make sure the idle speed and ignition timing are within the specifications.

Hello,

I own a 2004 Nissan Murano V6.

I am hoping that the reset sequence that is valid for a Titan is valid for the Murano.

Do you know if this is so.

This is the only forum I have found that speaks to these reset sequences.

I have a suspicion that they are the same across the family of Nissan's.

If so, then great.

If not, then can you point me to the right place for Murano's.

I haven't found a Murano forum that speaks the same language for resetting ECU's Throttle relearn, etc., and etc.,

Thank you in advance,

In any event I am goint to try out these sequences on my 2004 Murano.

Why?

I have an idle problem. It is idling low at this point.

Thanks again,

Ralph

[titanss]

Originally Posted by dancinbr

Hello,

I own a 2004 Nissan Murano V6.

I am hoping that the reset sequence that is valid for a Titan is valid for the Murano.

Do you know if this is so.

This is the only forum I have found that speaks to these reset sequences.

I have a suspicion that they are the same across the family of Nissan's.

If so, then great.

If not, then can you point me to the right place for Murano's.

I haven't found a Murano forum that speaks the same language for resetting ECU's Throttle relearn, etc., and etc.,

Thank you in advance,

In any event I am goint to try out these sequences on my 2004 Murano.

Why?

I have an idle problem. It is idling low at this point.

Thanks again,

Ralph

I found some info on a 05 Murano, should be the same as your 04, it is the same procedure as the Titan.

[Leadsled124]

Originally Posted by titanss

I found some info on a 05 Murano, should be the same as your 04, it is the same procedure as the Titan.

Should be the same... well not should be but a good chance. Its the same for the 350z

[dancinbr]

Well I need to give all of you guys a huge

Thank you!

The procedures are the same.

I was hoping they would be.

Afterall, the engines are similar, the computer components are probably the same, etc., etc.,

I went out and performed the procedures this morning and all the resets worked and it corrected my idle issue.

The Murano is back to running perfect.

The battery disconnect procedure for reset is what I had tried. It didn't work, at least not for the Idle Air Volume relearning.

But sure enough this procedure did work.

I didn't need to use a stop watch, I did the one-thousand one, one thousand two, etc., on all the procedures. I just had to get my cadence down properly.

Thanks so much

Ralph

[titanss]

Originally Posted by dancinbr

Well I need to give all of you guys a huge

Thank you!

The procedures are the same.

I was hoping they would be.

Thanks so much

Ralph

Anytime, Glad i could help.

[Titanomachy]

Originally Posted by chieflikalotapus

well found this on you tube...

YouTube - Resetting ECU on Nissan Titan

Quoted from a different thread and regurgitated here, thanks to chieflikalotpus for finding it and posting.

[titanss]

Originally Posted by Titanomachy

Quoted from a different thread and regurgitated here, thanks to chieflikalotpus for finding it and posting.

Original video by PoDunk Titan over on Club Titan.

Link: Video of Step By Step ECU Reset - Nissan Titan Forum

[Titanomachy]

Thanks for the info Titanss, Podunk did a good job showing what the CEL should do when done correctly. Instructions were good as well, Very helpful Video.

Now that programmers have entered the Titan world...
Will a ECU Reset overwrite a programmers tune with stock tune, or by reseting ecu, it resets/clears only the info on whats been "learned" keeping whatever tune is loaded intact?

[supertitan]

does anyone know if you can do this with the 08.5 titans?

[Titanomachy]

Originally Posted by supertitan

does anyone know if you can do this with the 08.5 titans?

http://www.titantalk.com/forums/1089828-post57.html

....Yesterday, Missed this myself too

resetting your ecu


Short answer is yes it can be used to reset 08's.

[Leadsled124]

Originally Posted by Titanomachy

Thanks for the info Titanss, Podunk did a good job showing what the CEL should do when done correctly. Instructions were good as well, Very helpful Video.

Now that programmers have entered the Titan world...
Will a ECU Reset overwrite a programmers tune with stock tune, or by reseting ecu, it resets/clears only the info on whats been "learned" keeping whatever tune is loaded intact?

no it will not do anything to your tune. Basically your old tune is stored in the Bullydog unit for say, and when you want to flash it to stock it swaps out the stock tune for the BD tune. You dont want to reset the ecu unless its last resort though. It clears important gathered driving knowledge and has to researn. this can afeect AFR, power and MPG for a short period of time