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Dadd Profile
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Date Registered: 06-2008
Location: New South Wales
TOTAL POSTS: 182
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Re: T31 4X4-i System


I apoligise if this has been covered elsewhere but there is something regarding the Xtrail 4WD system I am wondering about.
I know that is a requirement to have the same size tyres front and back but would there be a problem with transmission wind up ,on dry bitumen for instance, if although the tyres were the same size the front ones were worn down a bit and the rears were brand new? ( ie the less worn down tyre would travel slightly further per revolution of the wheel)
I know on the old school part time 4WD you can't engage 4WD on dry tarmac without problems but since the XTrail only drives the rear wheels when slippage occurs I assume it would be operating in front wheel drive mode on a dry road in normal circumstances.
I'm one of those people who don't rotate tyres at all so I could possibly wear out two sets of fronts without changing the backs.

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Glenn X-889
2008 ST Manual
14/Jul/2008, 10:25 pm Link to this post Send Email PM   Send Private Message ICQ AIM
 
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Date Registered: 10-2006
Location: Mona Vale, Sydney, AUSTRALIA
TOTAL POSTS: 5309
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Re: T31 4X4-i System


From what I can find in the owner's manual, the only restriction for bitumen is NO LOCK MODE.

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Kev X450(c) T30 Guru
03 Titanium Ti T30 Series 1 **MODIFIED**
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14/Jul/2008, 10:58 pm Link to this post Send Email PM   Send Private Message Blog
 
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Date Registered: 02-2008
TOTAL POSTS: 92
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Re: T31 4X4-i System


quote:

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

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."



Does anyone have any ideas on my last comment ?
> Does the active brake functon work with the ESP function switched off ?



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T31 ti CVT 08
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18/Aug/2008, 10:44 pm Link to this post Send Email PM   Send Private Message
 
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Date Registered: 07-2008
Location: North Lakes
TOTAL POSTS: 31
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Re: T31 4X4-i System


Been sitting around thinking about this for the week, and now have questions of my own:

I noticed in third-gear running thru a bit of soft sand, that leaving ESP activated makes the vehicle bob and weave more noticably... at a guess I'd say that its need to react to losses of traction have it grabbing brake and doing all sorts of things... and that in soft going a bit of intermittent wheelspin is hardly the end of the world.

So I switched it off, and left the 4WD in auto, and didn't have any flashing lights at all during the day, and found it appreciably less "grabby" in soft going.

NOW: the $64 question (which may be very easily answered by anyone... since the owner's manual's on the desk at the office, and I haven't opened it since I got the vehicle...) is AUTO 4WD mode dependent on ESP - or whatever it's called - for its activation? I'm not sure that it is, as in the hard going, I sometime got the yellow 4WD light (which I s'pose I bbetter read about, but think it might juust be to let me know she's working)...

If it's all ok and I haven't merely shot myself in the foot by turning off things I should be turning on (which is quite likely anyway), I can say that we had no hassles with the Ti's $WD system over the course of a good hour in soft sand each way on our Cooloola trip, and feel that the limits of clearance hindered us much more than any drivelin hassle... of course, we were in fairly mild going too...

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Scott (& Kristy, plus a trio of ankle-biters)

Member X-927 T31 Ti, Precision Grey manual
Fitted Options: Floor mats, window tint, tow pack, roof racks, 12' beach rod, AC/DC's "Powerage"
13/Sep/2008, 1:51 pm Link to this post Send Email PM   Send Private Message
 
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Date Registered: 07-2008
Location: Perth, WA
TOTAL POSTS: 476
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Re: T31 4X4-i System


I believe soft sand and ESP should never be used. The ESP is basically self defeating in this terrain and probably the main reason why Nissan have provided the option to turn it off.

Perhaps somebody far wiser than me can comment on the difference between ABS and Active Limited Slip Braking - I think the two are related and therefore operational with ESP on or off.

Agree on the BFG's.

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X-916, VW Golf 90TSi manual, limestone grey, no extras
2008 TL dc i, manual, twilight; full set bash plates, jaos strut bar
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Date Registered: 01-2008
Location: Darwin, N.T.
TOTAL POSTS: 74
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Re: T31 4X4-i System


My T31 loses power in mud or a river crossing. I've had this happen before and asked about it to no avail.

It seems as though the ESP gets triggered in these conditions due to tyre slip, but I had the ESP disabled at the time.

Exampe 1: Bogged in mud, and I cannot stop the engine from stalling even when revving highly (full throttle) in first gear.

Example 2: Climbing out of a river crossing, engine loses power up the slippery hill such that it stalls in first gear, at full throttle. No water got in the intake or distributor, before anyone asks. After a few seconds break I got up by playing the clutch heavily, but I would never have thought it necessary to do so.

Am I asking too much? I would have thought 125Kw would be sufficient under these circumstances. The X-trail did wonderfully well on the weekend except for the above problem. For those that know (or have heard of) the Reynolds river track, be assured the T31 X-trail is more than capable. 600mm river [sign in to see URL] problem (with blind attached). Rutted [sign in to see URL] problem.

Any other ideas? All I can think is that the 'ESP off' button isn't really turning the ESP ompletely off. Has anyone else come across the same problem? Or is there an easy way to test if the ESP is still functioning even when turned off?


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Daniel
T31 ST-L Manual
22/Sep/2008, 9:56 am Link to this post Send Email PM   Send Private Message
 
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Date Registered: 02-2008
TOTAL POSTS: 92
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Re: T31 4X4-i System


Thats a real bugger . All we have done is ask more questions. I think we need someone from Nissan engineering to help .

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T31 ti CVT 08
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22/Sep/2008, 5:45 pm Link to this post Send Email PM   Send Private Message
 
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Date Registered: 02-2004
Location: Panania, Sydney
TOTAL POSTS: 2852
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Re: T31 4X4-i System


Daniel, I notice you mentioned the ESP was OFF. The only thing I can think of is that the torque required to get out of the bog was so high that the revs dropped so much that the engine stalled. I have a T30 auto, and have only ever experienced lack of torque to get up a hill on one occasion, but because it's an auto, it just sat there revving and no wheels spinning. I am only guessing that the same situation in a manual would cause it to stall???

Someone with more knowledge of the ESP system and it's possible interaction with the 4WD system may need to answer this one (unless it's detailed extensively in the workshop manual/CD).

Slightly different, but the same principle: Even though the owner's manual states that the 4WD system may still engage when in 2WD mode (T30 version, and I assume T31 as well), it wasn't until a few members were able to do some real-life tests to confirm it (and Jalal did significant damage and found out the hard way!). Perhaps the only way we're going to find out about the ESP system is after some people have been able to do some good testing with it on and off, and also with 4WD mode changes to see if the two systems are interlinked...

(Forgive me if what I've said has already been mentioned - I don't read all the T31 threads 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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Date Registered: 08-2008
Location: Brisbane
TOTAL POSTS: 54
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Re: T31 4X4-i System


Under the two bogging circumstances should LOCK have been used? It may have eliminated the "thinking" done by the cars computer which could have been trying to control the situation.

There really should be a "I need to get the hell out of here" button that shuts down all the aids and gets the power to the ground. Maybe LOCK is that setting?

---
2008 TL 6 Speed Manual, Precision Grey. Tint, Rubber Mats, Towbar, Roofracks, 2 x Thule Bike Carriers
23/Sep/2008, 10:32 am Link to this post Send Email PM   Send Private Message
 
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Date Registered: 10-2006
Location: Mona Vale, Sydney, AUSTRALIA
TOTAL POSTS: 5309
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Re: T31 4X4-i System


quote:

PaulieT31TDi wrote:
There really should be a "I need to get the hell out of here" button that shuts down all the aids and gets the power to the ground. Maybe LOCK is that setting?



Sometimes even something like that won't help when you go beyond the limits of what the Xtrail was designed for.

---
Kev X450(c) T30 Guru
03 Titanium Ti T30 Series 1 **MODIFIED**
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23/Sep/2008, 11:18 am Link to this post Send Email PM   Send Private Message Blog
 


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