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NPC73
X-TRAIL HOLIC
Date Registered: 12-2004
Location: Mount Isa, QLD
TOTAL POSTS: 1247
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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.
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, 5:09 am
--- 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!)
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30/Dec/2005, 10:34 am
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BRETT72
X-TRAIL HOLIC
Date Registered: 10-2005
Location: Orange. NSW.
TOTAL POSTS: 1999
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Re: How to Reset/Reprogram your ECU - Series I
Noel,
Excellent post, but...I 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, 2:11 pm
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30/Dec/2005, 12:45 pm
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powderbomber
X-TRAIL ENTHUSIAST
Date Registered: 06-2005
Location: South Central Down Under
TOTAL POSTS: 114
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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..
--- '04 ST Auto - Diamond White
16" S15GT 200sx Alloys
Alutec Strut Bar
K&N Air Filter
Stage 3 Brake light sticker mod
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30/Dec/2005, 3:17 pm
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jalalski
Date Registered: 02-2004
Location: SUTHERLAND, SYDNEY
TOTAL POSTS: 29100
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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
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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30/Dec/2005, 4:49 pm
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Eggins
X-TRAIL ENTHUSIAST
Date Registered: 08-2004
Location: Brisbane
TOTAL POSTS: 184
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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
--- 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
http://eggins.synthasite.com/
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31/Dec/2005, 3:31 pm
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