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NPC73 Profile
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Date Registered: 12-2004
Location: Mount Isa, QLD
TOTAL POSTS: 1247
posticon How to Reset/Reprogram your ECU - T30 Series I & II


For those that have recently done a performance upgrade (i.e. K&N Filter, Iridium Spark Plugs, Exhaust, etc, etc), an ECU reset/reprogram is advisable.

By performing a reset/reprogram your ECU will self adjust to give the proper air and fuel mixture for your engine which in theroy will give you the best fuel economy based on your upgrades.

Here is how to do it:

1. Start up your X-Trail and allow it to warm up to its normal idle.

2. Next turn off the engine.

3. Locate the fuse box located under the bonnet and next to the battery. Pull out the 3 fuses: ENG CONT1 (15A), ENG CONT2 (10A), ENG CONT3 (20A). Refer to the pics below. Keep the fuses out for at least 5 minutes. This will cut all power to the ECU.

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4. Plug the fuses back in and close the bonnet.

5. Start your X-Trail making sure NOT TO TOUCH THE ACCELERATOR WHEN YOU START IT UP. This is very important.

6. Let the X-Trail idle at its normal idle speed for about 4 minutes, then turn off your engine.

7. Start your X-Trail again and you're done.

Last edited by jalalski, 9/Feb/2012, 6:09 am


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Noel...
Member ID: X-072 (Retired Administrator)
2003 X-trail, TI, Manual, (Series 1) - (with the works)
2013 Toyota Prado, Manual, Turbo Diesel - (Snorkel-K&N-Full Exhaust, 20" Low Profiles, Chrome Bullbar, HID Spots, + All the Bling!)
30/Dec/2005, 11:34 am Link to this post Send Email PM   Send Private Message MSN Blog
 
BRETT72 Profile
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Date Registered: 10-2005
Location: Orange. NSW.
TOTAL POSTS: 1999
Re: How to Reset/Reprogram your ECU - Series I


Noel,

 Excellent post, [sign in to see URL] have one concern.

 Has this been proven to work or am I expecting to see another post soon titled, "Warning, don't attempt to reset ECU."

 I am sitting here, looking at the exee contemplating pulling the fuses. My wife is looking over my shoulder, sceptical that it works. I guess I know who wears the pants now.

 I enjoy sleeping inside. If I stuff her car, then I'm with the dogs.

 Are you intending to post another thread soon with the results ??

 I have been very interested in resetting the ECU since I completed my upgrades. Researching the other forums has left me with more questions then answers, with everyone having their own opinion as to how to carry out this function and whether it actually works.

 Looking forward to your follow-up thread.

Last edited by BRETT72, 30/Dec/2005, 3:11 pm


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BRETT72 - X235

30/Dec/2005, 1:45 pm Link to this post Send Email PM   Send Private Message MSN
 
powderbomber Profile
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Date Registered: 06-2005
Location: South Central Down Under
TOTAL POSTS: 114
Re: How to Reset/Reprogram your ECU - Series I


i cant imagine that irreparable damage could occur from doing this, its the same as if say, you left your lights on and flattened your battery - or you disconnected or took your battery out to install a stereo or put a new battery in etc..


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'04 ST Auto - Diamond White
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K&N Air Filter
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30/Dec/2005, 4:17 pm Link to this post Send Email PM   Send Private Message
 
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Date Registered: 02-2004
Location: SUTHERLAND, SYDNEY
TOTAL POSTS: 28983
Re: How to Reset/Reprogram your ECU - Series I


Hi Brett,

I was with Noel when we both tried this, but as with every DIY, if you do attempt to do this, you gonna have to do this at your own risk emoticon

We don't want you ending-up sleeping outside of the house LOL

The ECU reset process through the fuses is no different that un-plugging the terminals of your battery which would achieve the same result if you leave the battery disconnected for 24hours. The ECU will also reset then.

As far as confirming if it works or not, time will tell, when and if the fuel economy improves, but I can tell you that Noel's RPM has been adjusted as a result of this reset, as his idle was sitting on 1000rpm (which I thought was a bit high) and now it's back to the normal 900rpm.


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Date Registered: 08-2005
Location: coffs harbour
TOTAL POSTS: 34
Re: How to Reset/Reprogram your ECU - Series I


 Hi ppl happy new year. Does this work on a ser 2 xtrail ?? I had a problem with my xtrail the other day was under the bonnet looking at the throttle body to clean and made a mistake of taking off 1 of the wire harnes with the key in the on postion(the kids were in the car helping they said with the music on ) put it back together then went 2 drive off the car would not reve over 1500rpm so i drove it to a mates garage. Where he put his consult computer on it we found that i had put a fault code in for the throttle it took him a about 2mins 2 take the code out and it was all new again. The "Miss was not happy " lol whats new thats 1 more i need 2 make up
30/Dec/2005, 8:49 pm Link to this post Send Email PM   Send Private Message
 
BRETT72 Profile
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Date Registered: 10-2005
Location: Orange. NSW.
TOTAL POSTS: 1999
Re: How to Reset/Reprogram your ECU - Series I


Jalal/Noel.

 Ok, you have sold me.

 I have just snuck out and disconnected the fuses you listed.

 Worse case scenario, I share the new lambs wool bed with the trusty ridgeback and boxer.

 I guess we now have three exee's to use as guinear pigs. What's the worst thing that can happen, it drives like a Sportage.

 Finally, I should have asked [sign in to see URL] do you get the stereo pin codes from.
 

Last edited by BRETT72, 30/Dec/2005, 9:24 pm


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BRETT72 - X235

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Date Registered: 10-2005
Location: Newfoundland Canada
TOTAL POSTS: 395
Re: How to Reset/Reprogram your ECU - Series I


G'day mates:

By my clock, it's about 10:45 am on New Years Eve for you guys (still 30 Dec. here)

So, I'll start by wishing y'all a very Happy New Year and all the best that 2006 can bring to you and your families.

Be safe this evening . . .

And, next year, after y'all sober-up, perhaps you can entertain some dumb questions on this topic :

 "an ECU reset/reprogram is advisable" - might this apply with only minimal upgrading, such as only a K & N filter ?

"1. Start up your X-Trail and allow it to warm up to its normal idle" - could it also be done after driving the vehicle to normal operating temperature and then just letting it idle for a short period ?

"How to Reset/Reprogram your ECU - Series I" - you seem to have specified the
Series 1 - is there a reason for that or might the same process apply to other Series ?

Was also kinda "curious" about the "source" of this info. ??

Also wondering if there would be a "record" of when the last ECU reset was done and if the dealer would have any issues with a vehicle which was still under warranty ??

As I said, some of these may be dumb questions - and the latter ones may not have answers available - but it doesn't do any harm to ask.........

Cheers
 

      

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Roger
X 228


2006 X-T Bonavista Edition
Production Number 0001

31/Dec/2005, 10:49 am Link to this post Send Email PM   Send Private Message
 
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Date Registered: 12-2005
Location: Northern NSW
TOTAL POSTS: 103
Re: How to Reset/Reprogram your ECU - Series I


Resetting the ECU is actually done by dealerships after they service your vehicle and use the diagnostic scan tool, on both series 1 and 2.

Prior to the first air filter change, the ECU would learn that it is clogged. Once the new filter is fitted, the ECU should be reset so it can 'learn & adapt' from its factory base fuel/ignition maps to suit the new air flow.

Even the humble Hyundai Accent/Excel does this.

Resetting the ECU has no harmful affects, as stated is similiar to changing your battery. The ECU has a base code, that cannot be erased so resetting the ECU will just require some normal driving to adapt.

---
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31/Dec/2005, 1:27 pm Link to this post Send Email PM   Send Private Message
 
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Date Registered: 08-2004
Location: Brisbane
TOTAL POSTS: 184
Re: How to Reset/Reprogram your ECU - Series I


quote:

Eggins wrote:

Our dealer told us that all the newer Nissan ECUs dont lose all their "learnt" parameters and settings by disconnecting the battery for any reasonable length of time. The ECU is supposed to remember everything it has learnt, unlike ealier models and different makes.
They have told us that they are happy to reset it for us at the next service using the Nissan Consult II interface.
I would have thought (initially) that it might have been a money grabbing exercise, so that they could charge us for something I could have done myself, but they are not going to charge me! So maybe it's true.



Well I tried resetting the ECU this morning by removing the three fuses exactly as detailed in this thread, and it did definitely seem to reset the ECU.

Even though we have a Series 1, we have the same ECU and latest program the same as in a series 2.

I guess it's like Jalal says, Nissan just say that you can't reset it yourself just so you dont mess with it. And probably so that you don't clear any error codes they might want to know about at the next service.

There have been no ill effects and you don't have to remember how to enter your radio code.

Shawn

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Shawn and Belinda Eggins
2003 STR, K&N, Strut brace, Ground wires, Dunlop LM702's, Tint, Mud flaps, Tow, Nudge, Spots, Mats, Rear scuff plate
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31/Dec/2005, 4:31 pm Link to this post Send Email PM   Send Private Message
 
BRETT72 Profile
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Date Registered: 10-2005
Location: Orange. NSW.
TOTAL POSTS: 1999
Re: How to Reset/Reprogram your ECU - Series I



 Since 'resetting' the ECU, I have found that my idle rpm's have dropped from 1100 to 900. I will let you know how the fuel economy and performance aspects go.

 All the best to everyone in 2006.


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BRETT72 - X235

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