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jalalski Profile
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Date Registered: 02-2004
Location: SUTHERLAND, SYDNEY
TOTAL POSTS: 28992
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T31 4X4-i System


Hi Guys,

This thread has been created to discuss the new xtrail T31 "4x4-i" also referred to as the Intelligent 4x4 system.

Please use this thread to post your experience with this system and any information that you come across.

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5/Mar/2008, 9:39 am Link to this post Send Private Message MSN Blog
 
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Date Registered: 02-2004
Location: SUTHERLAND, SYDNEY
TOTAL POSTS: 28992
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Re: T31 4X4-i System


Posted by choppa - Moved from another thread
===========================================================

Hi guys, I think you'll find that the 4x4-i is just the fancy branding to tie in the added features of the new model (adding ESP, up hill start & descent control). The extra programming is added to the ABS/4WD module along with some new and revised sensors.

up hill start: on inclines >10% the ABS system holds the brakes an extra couple of seconds. also works when reversing [up an incline]
descent control: uses the ABS system to keep brake pressure to maintain speed of 8km/h (also works in reverse). Operates in LOCK mode only so as to use full traction and engine braking assist through the driveline.
ESP (program that provides vehicle stability and traction control): poor-man's LSD - you'll find out why when you're deep in the soft sand. ABS system brakes the slipping [sign in to see URL] for dirt and wet roads though

up hill start and down hill descent are handy for the lazy but from a safety standpoint, ESP is the bomb that should be standard on every single car worldwide!



Last edited by jalalski, 5/Mar/2008, 9:46 am


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5/Mar/2008, 9:41 am Link to this post Send Private Message MSN Blog
 
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Date Registered: 02-2004
Location: SUTHERLAND, SYDNEY
TOTAL POSTS: 28992
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Re: T31 4X4-i System


Posted by luvoueexy - Moved from another thread
===========================================================

Have had a little play with the ESP on our T31 and here is what I found ( which is pretty much what the manual says about it )

The second day we had the car we went for a drive up mount sugar loaf ( local 4wd area ) it wasn't long before I detoured of hard ground and found a narly rock ledge I was dying to try out just to see if boris was telling the truth in the add. The decent was easy despite this being a high rated difficulty hill the clearance was the only problem and all the electronics worked together to stop wheel spin and braking lock up ... easy!!!
When we had to go back up my disappointment arose half way up the car bogged down in power and stalled then I had to ride the clutch all the way to get up this is where I thought the capabilities of the X-trail were realised .. it needs low range.

Not happy, I had another attack plan so I went out 2 weeks later to try again ( Much to my mothers fright who was in the car and thought we were going for a nice sunday drive ) I went down 2 rock ledges this time and like before decent was easy !!

Going back up however I turned ESP off stuck it in first and we slowly climbed our way up the two hills aloteasier than before no stalling no clutch sliping, she went up just like a normal 4wd.

The reason I belive is that when the ESP notices wheel slip it takes power away from the engine to minimise but I had that much wheel spin it near killed the engine power so turning it off I was able to keep 100% down to all the wheels and claw my way up the rock ledge.

Now I am very impressed with he X-trail If this doesnt all make sense let me know and I will write it again ...Just what I have found any way emoticon


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Last edited by jalalski, 5/Mar/2008, 9:46 am


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5/Mar/2008, 9:43 am Link to this post Send Private Message MSN Blog
 
Revhead Kev Profile
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Date Registered: 10-2006
Location: Mona Vale, Sydney, AUSTRALIA
TOTAL POSTS: 5291
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Re: T31 4X4-i System


Hi Luvoueexy,

Brett72 had the same problem with a Pajero test-drive when all the electronics got confused in soft sand and continually shut down the engine. See his report in ]this thread and scroll down to the bottom of the page to read my question and his reply.

You have a button to disable the ESP and it seems you'll be using it more than you would expect emoticon


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5/Mar/2008, 10:46 am Link to this post Send Email PM   Send Private Message Blog
 
Luvoueexy Profile
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Date Registered: 02-2008
Location: Mayfield East Newcastle NSW
TOTAL POSTS: 105
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Re: T31 4X4-i System


Yes I think this is one of the best Parts of the ESP system on the X-trail Kev is that you can turn it on and off especially when the system is more of a handicap than an aid in different circumstances.

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5/Mar/2008, 12:56 pm Link to this post Send Email PM   Send Private Message MSN
 
basshead Profile
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Date Registered: 02-2004
Location: Panania, Sydney
TOTAL POSTS: 2852
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Re: T31 4X4-i System


Now just for a report from someone with the Auto/CVT transmission to see if it suffers the same engine-reduction "feature" as the manual version - This is Helldude's (and any other members with the new CVT version) "official" invitation to do some off-roading emoticon


Last edited by basshead, 5/Mar/2008, 5:23 pm


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Date Registered: 02-2008
Location: Mayfield East Newcastle NSW
TOTAL POSTS: 105
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Re: T31 4X4-i System


I think the result would be totally diffrent with the CVT it would be like putting your hand brake on in a manual and trying to release the clutch with high revs .. It would stall then putting hand brake on with CVT and pushing accelerator the engine would just push against the brakes and not stall ... I think but wait to see what the report is emoticon

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5/Mar/2008, 8:53 pm Link to this post Send Email PM   Send Private Message MSN
 
Helldude Profile
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Date Registered: 02-2008
TOTAL POSTS: 92
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Re: T31 4X4-i System


So if I read this correctly , if the ESP is switched off there is no "active limited slip braking " available.
I was under the impression that a wheel lifted off the ground would recieve braking force from the ABS/ESP allowing drive to the wheels on the ground.
Is this the case with ESP switched on? or do you lose power to all wheels halting forward progress.


Only 500 ks on the clock , waiting for first service before I let her of the leash emoticon

Further on what I'm talking about >>>
I need some one the comprehend this for me , Its a bit ambiquous.
" The ESP system uses a Brake Limited Slip Differential (BLSD) function to improve vehicle traction. The BLSD system works when one of the driving wheels is spinning on a slippery surface. The BLSD system brakes the spinning wheel ,which distributes the driving power to the other drive wheel . If the vehicle is operated with the ESP system turned off , all ESP system functions will be turned off.

THe BLSD system and ABS will still operate with the ESP system off. If the BLSD system is activated, the "SLIP" indicator light will blink and you may hear a clunk noise and/or feel a pulsation in the brake pedal. This is normal and not a mulfunction."

Last edited by Helldude, 10/Mar/2008, 9:54 pm


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5/Mar/2008, 10:36 pm Link to this post Send Email PM   Send Private Message
 
ozstickman Profile
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Date Registered: 04-2008
Location: Rockhampton QLD
TOTAL POSTS: 127
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Re: T31 4X4-i System


I find the electronics in the X-Trail great.
I went to Noosa last weekend and on the way home Saturday it was p1ssing down and where a normal car would hit water and be pulled through it or loose traction the computer sorted it all out and was back on the straight and narrow.

I have had a play with 4x4, 4x4 lock, hill decent (hard to get use to), and the ESP in a quarry near my place. Jal was right with the ESP on going up sucks because it doesn't allow wheel spin which looses power to the wheels.

All I need now is to con the war and finance minister into getting a second set of treads for her.

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6/Jun/2008, 4:58 pm Link to this post Send Email PM   Send Private Message
 
basshead Profile
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Date Registered: 02-2004
Location: Panania, Sydney
TOTAL POSTS: 2852
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Re: T31 4X4-i System


quote:

ozstickman wrote:

I have had a play with 4x4, 4x4 lock, hill decent (hard to get use to), and the ESP in a quarry near my place. Jal was right with the ESP on going up sucks because it doesn't allow wheel spin which looses power to the wheels.




That would seem like it would greatly impact your ability to maintain momentum, which is something else you need to get up those steep inclines... As you said, better tyres would solve most of the wheel-spin problems in that scenario (free plug = BFG's! emoticon ).


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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.
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