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Robbo0001 Profile
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BANNED USER

Date Registered: 07-2008
Location: Brisvegas, Australia
TOTAL POSTS: 1063
Re: How to Reset/Reprogram your ECU - Series I & II


quote:

I thought I'd mention (as I don't think it has been before) that if you do a long trip, the ECU goes into an "economy" or "cruise" mode, and you may notice when you get back to the city that the performance appears to be alot better than before the long trip. Gradually the performance decreases until the ECU changes back to "city" mode. "....Rich


Very old quote from this thread but I have to agree in our case...CAI and stock extractors with Cat (3 inch cat back modded exhaust).
After a 240km run up/back to the coast (aircon on, 110km per hour) on a quarter of a tank, we are still currently on 350km with half a tank to go, with city driving.
Usual consumption in town with aircon is around 450km per tank...

Love to find a way to "lock" the ECU in cruise mode....hasnt been detrimental to the right foot in any way...and cheaper to run
Anyone else notice this before piggybacks got put on?
Even stock Exys?

Edit spelling again


Last edited by Robbo0001, 21/Mar/2009, 12:36 am


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Dave
99 GU Patrol 2.8TD
Ex-2002 T30 TI Xtrail
21/Mar/2009, 12:29 am Link to this post Send Email PM   Send Private Message
 
dca Profile
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Date Registered: 05-2009
Location: Ankara/TURKEY
TOTAL POSTS: 33
Re: How to Reset/Reprogram your ECU - Series I & II


as a new member i am checking all posts and other forums about xtrail. because of having used xtrail, i normally have problems to fix. one is newly developed check engine light due to p0420 error. i read about that code and Jelalski commented that this is due to faulty oxygen sensor(s). car is on 121000 kms.

I decided to try to reset ecu to see if it works( because i installed new airfilter, new spark plugs), i removed battery it did not helped. i removed those three fuses related to ECU, engine control 1 2 3, waited for 1 hour. installed them back, norhing changed. light came on immediatelly as if i did nothing.

there was another instruction somewhere else to reset ecu or to see codes by counting flashing light on dash(turn on inginiton to on position wait for three seconds, press and release gas pedal for 5 times etc), i tried that one numerous times, it did not work as well. nothing flashed at all.

any comments? did i do something missing? any instructions?
11/May/2009, 1:31 am Link to this post Send Email PM   Send Private Message
 
jalalski Profile
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Date Registered: 02-2004
Location: SUTHERLAND, SYDNEY
TOTAL POSTS: 29087
Re: How to Reset/Reprogram your ECU - Series I & II


Error codes can not be erased, they meant to stay in the ECU memory until attended to by the dealer, otherwise there will be little point in having these error codes if you can erase them from the ECU memory and dealer can't trouble-shoot.

The error codes can only be erased using Consult II by Nissan after the fault has been fixed or you can do so yourself following THIS procedure. If you attempt to do this before fixing the problem, the ECU will pick-up the fault again after the re-set and the check engine light will come on again.

I suggest you try and fix the problem rather than trying to ignore it.

Last edited by jalalski, 11/May/2009, 7:32 am


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11/May/2009, 7:26 am Link to this post Send Private Message MSN Blog
 
gurov Profile
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Date Registered: 05-2009
TOTAL POSTS: 7
Re: How to Reset/Reprogram your ECU - Series I & II


one of the things we've done with the sentras is prevent ECU from keeping long term trims in its memory.

the qr25de ecu has 2 sets of trims for fuel, long term trims and short term trims.

long term trims are meant to be a baseline to account for fuel injectors getting dirty, fuel pump degrading in pressure/flow and things like dirt on the inside of the intake manifold affecting volumetric efficiency of the engine. short term trims are immediate airfuel adjustment for current operating mode as determined by the oxygen sensor (the nissan ecu can tell a whole lot about the mixture from the narrowband)

on the sentra, there's a "back up power" wire going to the ecu on the harness, when cut it leaves ecu effectively unplugged from power, unable to keep its settings, this resets the LONG term fuel trims same way as unplugging the battery would reset them.

this does not get rid of the stored codes, but these can be removed with a very simple and cheap obd2 code reader/reset tool, if the AU nissans are set up in any way similar to the US nissans as far as obd2 and ecu access goes.

another way to quickly reset fuel trims completely is to unplug the maf sensor, start the car without it, let it idle for 10-15 seconds, shut it down and plug the maf back in. this WILL throw a code but will also reset the long term fuel trims instantly.

the nissan service manual (for the sentras at least, and other vehicles i've got manuals for) outlines a procedure with the gas pedal to reset the codes


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04 specv turbo t3/t4 57 trim 15 psi, stock internals, block guard, megasquirt2 fuel control, j&s safeguard ignition knock suppressor, alky,
02 specv turbo - fully built, sc61 - being broken in right now
05 se-r auto - intake/exhaust
20/May/2009, 7:49 pm Link to this post Send Email PM   Send Private Message AIM Yahoo
 
jalalski Profile
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Date Registered: 02-2004
Location: SUTHERLAND, SYDNEY
TOTAL POSTS: 29087
Re: How to Reset/Reprogram your ECU - Series I & II


quote:

gurov wrote:
another way to quickly reset fuel trims completely is to unplug the maf sensor, start the car without it, let it idle for 10-15 seconds, shut it down and plug the maf back in. this WILL throw a code but will also reset the long term fuel trims instantly.

the nissan service manual (for the sentras at least, and other vehicles i've got manuals for) outlines a procedure with the gas pedal to reset the codes



What you have outlined will involve a lengthy idle re-learn procedure to re-set the idle. It can be done with the gas pedal as stated but I personally never managed to get the hang of it and get the precise timing right to complete this process.



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20/May/2009, 8:49 pm Link to this post Send Private Message MSN Blog
 
basshead Profile
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Date Registered: 02-2004
Location: Panania, Sydney
TOTAL POSTS: 2852
Re: How to Reset/Reprogram your ECU - Series I


quote:

jalalski wrote:

Hmmm, not sure about that Adam, as even when you reset the ECU and you run normally, the ECU will still collect all the errors it is receiving, hence by the time you get to your dealer and you have a problem, it'll be there and recorded as a fault code in the ECU.

Don't think our ECU is intelligent enough to keep history data, it will only spit out the last and latest fault code and following your example above in regards to a faulty sensor, this fault code will be there.

The ECU re-set does not and will not correct fault codes, it will clear them only to receive them again after you resume your normal driving.



I'll test this theory out later this afternoon. I just replaced the crank position sensor and the check-engine light is still lit up. I'll see if it disappears when I perform the ECU-reset as instructed on the first page of this thread.

Edit: I just finished reading through the whole thread and Jalal's post earlier up this page mentioned that the error codes CAN'T be reset... I'll read through the pdf he posted...

Edit2: Checked and Reset the check-engine code as per Jalal's PDF link above. It works, and the odometer/trip distances are still the same. I might do a full ECU reset later as I haven't done one before, even with the K&N filter...

Edit3: I just completed the ECU reset by pulling the fuses as per the first page of this thread. I am curious as to how it would be any different from just disconnecting the battery - removing the fuses essentially achieves the same result. Perhaps it's the sequence of doing it (with the time for each step) and convenience of not having to lose radio memory etc. The trip meter and dash time were still the same after I completed the procedure - so either that data is stored in another computer somewhere, or the ECU reset didn't work (indicating it might be a different procedure for the Series 2 ECU) emoticon


Last edited by basshead, 16/Jun/2009, 9:08 am


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Rich. X-013(c)
'04 S2 ST Auto. Nudge_roofracks_tow_tints_Lightforce_GME_YokoGeoA/T-S_TBS_bashplate_50mm-spacer-lift
Click here to see >300MB of photos and videos All For His Glory.
15/Jun/2009, 5:31 pm Link to this post Send Email PM   Send Private Message MSN Yahoo Blog
 
MRK33E Profile
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Date Registered: 09-2009
Location: Sydney NSW
TOTAL POSTS: 6
Re: How to Reset/Reprogram your ECU - Series I & II


hi to all, i got the some problem, i got a series 2 it doesnt work on series. luck my work had the dignos scan tool, it took in less then 2min to reset the ecu, best of all it free.. emoticon

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BOL X-1410 (c)
05 T30 II TI_L
27/Sep/2009, 12:27 am Link to this post Send Email PM   Send Private Message
 
jalalski Profile
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Date Registered: 02-2004
Location: SUTHERLAND, SYDNEY
TOTAL POSTS: 29087
Re: How to Reset/Reprogram your ECU - Series I & II


The procedure is applicable to both series I and II if followed correctly.

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27/Sep/2009, 2:03 am Link to this post Send Private Message MSN Blog
 
CHRISMUR Profile
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Date Registered: 10-2010
TOTAL POSTS: 64
Re: How to Reset/Reprogram your ECU - Series I & II


"Hello" I am from the U.K. and I have a 2006 2.0 SE XTRAIL - [2 Wheel Drive] - I think that Jalalski told me in a previous Post that my Engine is a T30 [?]

I have researched online AND in my Drivers Manual to try to establish IF I would need to have ANY
`resetting` done if I renewed the Xtrail`s Battery - OR If I would need a Radio CODE after changing the Battery ??

I cannot find anything that is a DEFINITE answer to what should be a `Simple` answer in the case of the Radio Code at least [?].
I know that some people may state - If no reference to a Radio Code in your Driver Manual - `Obviously` means NO RADIO CODE - BUT - I have to make sure - WITHOUT going to a Dealer [?]

I would really appreciate any `Expert Advice` on these points "Please" - "Thanks".


CHRISMUR.

19/Dec/2010, 6:12 am Link to this post Send Email PM   Send Private Message Blog
 
hiimkam Profile
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X-TRAIL FANATIC
 


Date Registered: 11-2008
Location: Perth
TOTAL POSTS: 414
Re:


Hey Chris.

If you remove your battery for long enough it will reset your ECU for you, nothing to worry about though, doesn't change much. However you will need your radio code, if you call up your local Nissan dealer, regardless if you bought the car from them or not, and give them your chassis/VIN, they'll be able to tell your radio code.

p.s. your 2006 x-trail is a T30 model, the new (2007 and up) model is a T31 your motor is a QR20DE if it's petrol (I think the SE models are petrol?)

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GT2860rs, Ems stinger, tial external gate, 3" exhaust, 10psi and ~200kw @ all fours. Koya drifteks w/245/50 rubber, 70mm lowered springs, slotted rotors and painted calipers :)
19/Dec/2010, 9:42 pm Link to this post Send Email PM   Send Private Message MSN
 



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