i was jw what are the exact steps in resetting the ecu....and when u need to actually do this...thanx

 

Wtf is "jw"?

Anyways, locate your ECU fuse, either the in-cabin fuse panel or the engine bay fuse panel. Pull it and wait 30 secs or a minute. Put it back in and your ECU should be reset.

 

just disconect the battery terminal for 30sec or pull out the clock/radio fuse (fuse 7.5) from the panel under the hood

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Toda Built &raquo;</TD></TR><TR><TD CLASS="quote">just disconect the battery terminal for 30sec or pull out the clock/radio fuse (fuse 7.5) from the panel under the hood</TD></TR></TABLE>

Negative battery terminal.


<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by riceburner247 &raquo;</TD></TR><TR><TD CLASS="quote">Wtf is "jw"?

Anyways, locate your ECU fuse, either the in-cabin fuse panel or the engine bay fuse panel. Pull it and wait 30 secs or a minute. Put it back in and your ECU should be reset.</TD></TR></TABLE>

"jw" would be 'Just wondering'

 

but when would u need to do this

 

Anytime you mod you engine.

I have heard of both ways to resetting the ECU. I read in my integra manual: It said pulling the neg. terminal for like 2-5 minutes will do it. Reconnect then let it sit for 2-5 minutes.

 

so u do something simple such as a intake/exhaust/header....u should reset ur ecu ...and resetting it will do what for u

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by luvinmyGSR &raquo;</TD></TR><TR><TD CLASS="quote">so u do something simple such as a intake/exhaust/header....u should reset ur ecu ...and resetting it will do what for u </TD></TR></TABLE>

By manually resetting the ECU, it allows its program to adjust to the new engine changes. It isn't required to reset when you do I/H?E, but it doesn't hurt.

 

As a side note, after taking the power away from the ECU to reset it, start the engine and let it run for 10-15 mins WITHOUT touching the gas or anything.

This will allow the ECM to take into effect what changes have been made, and will adjust for them accordingly, to an extent of course.

 

Do what he said. That was verbatim from the manual!!!

 

In the fuse box in the engine bay. Pull the 15amp and the 7.5amp fuse on the top left corner of the box. Leave it out for like a minute to allow time for things to clear up.

Put them back in and start the car. Run the car for 10 minutes. Do not touch the throttle and let it idle. Make sure the car was warmed up prior to pulling the fuses, this is important.. This will allow the ECU to relarn your car, thus making the car run better.

 

excellent tips. i love this forum..

its so educational...

 

true that....i thought i knew everything...but i learn somethin new everyday....

 

thanx guys ....h-t is a great site...

 

after getting a code 43...

u have to reset the ECU right?

 

The proper way to reset your ECU is to:

1. Let car warm up to idle

2. Pop the hood, locate fuse block under hood

3. Remove the ECU fuse (usually 15 amp) from the block and wait 15 min for the ECU to fully reset. (don't pull the battery terminal, then you have to reset the clock and your radio which is a pain in the *** for me)

4. Replace fuse and start the car and let it run for 15 min. without touching the throttle once during the 15 min interval. Shut the car off

5. Restart it and test it and you should notice a slight difference if you have minor modifications (ex. H/I/E).

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by magikalxpinoy &raquo;</TD></TR><TR><TD CLASS="quote">after getting a code 43...

u have to reset the ECU right?</TD></TR></TABLE>

You can try resetting the ECU, but that won't necessarily get rid of a CEL. A CEL code of 43 is a Fuel Supply Sytem problem.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mugen92acintls &raquo;</TD></TR><TR><TD CLASS="quote">The proper way to reset your ECU is to:

1. Let car warm up to idle

2. Pop the hood, locate fuse block under hood

3. Remove the ECU fuse (usually 15 amp) from the block and wait 15 min for the ECU to fully reset. (don't pull the battery terminal, then you have to reset the clock and your radio which is a pain in the *** for me)

4. Replace fuse and start the car and let it run for 15 min. without touching the throttle once during the 15 min interval. Shut the car off

5. Restart it and test it and you should notice a slight difference if you have minor modifications (ex. H/I/E).

</TD></TR></TABLE>


Where did you see this as the "proper" way to reset the ECM ?

First, the fuse the pull to interrupt the circuit to the ECM is under the dash, not under the hood. And also, when you pull this fuse, it will still clear the radio, just like pulling the neg. battery terminal does. If it doesn't, then it's not breaking the circuit and therefore, not resetting your ECM.

You do have the part right about starting the car up afterwards and letting it idle for approx. 15 mins without touching anything.

And with an I/H/E...I'm doubting you are going to "feel" a different. Maybe if your butt dyno is really sensitive. lol

Just wanted to clear that up.

 

DO NOT PULL THE NEGATIVE TERMINAL!

If you create a spark it sends a surge through the ecu, and can damage the ECU... Use the fuse as some of these guys said... And as the kid said: Turn off the car after letting it run for 10 minutes... Turning off the car will store the new settings in the ECU... If you do not shut the car off, the ECU will inproperly "learn".

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 631 Teggy &raquo;</TD></TR><TR><TD CLASS="quote">DO NOT PULL THE NEGATIVE TERMINAL!

If you create a spark it sends a surge through the ecu, and can damage the ECU... Use the fuse as some of these guys said... And as the kid said: Turn off the car after letting it run for 10 minutes... Turning off the car will store the new settings in the ECU... If you do not shut the car off, the ECU will inproperly "learn".</TD></TR></TABLE>

That's news to me. I've never heard that before.

And then tell me, why is it that the first step in almost everything in the service manual is to remove the neg. battery terminal ? Apparently Honda doesn't know what they're doing then, huh ?

 

I understand that is what honda says. But honda also tells you the incorrect way to break in your car after a rebuild or new parts... As far as it being a common thing for people to fry their ecu? No, but I used to work at a gas station/mechanic shop and the three mechanics there gave me **** for it because I did it in front of them to my car... Apparently it happens.. I'm just trying to be helpfull...

 

i dont know where ppl get this pull your radio back up crap from, its the 15V fuse to the left of that. why would disconnecting your radio do anything for your ecu?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dohc VTEC eaaater &raquo;</TD></TR><TR><TD CLASS="quote">i dont know where ppl get this pull your radio back up crap from, its the 15V fuse to the left of that. why would disconnecting your radio do anything for your ecu?</TD></TR></TABLE>

15V ? I think you mean 15 amp

None the less...this is my last attempt and the best I can describe to you guys.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ScreaminTeg &raquo;</TD></TR><TR><TD CLASS="quote">

15V ? I think you mean 15 amp

None the less...this is my last attempt and the best I can describe to you guys.



</TD></TR></TABLE> yes thats what i meant lol

 

i have never heard of anyone frying their ecu by disconnecting the negative terminal. it's the fastest and easiest way.