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Revhead Kev Profile
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Date Registered: 10-2006
Location: Mona Vale, Sydney, AUSTRALIA
TOTAL POSTS: 5942
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Re: ECU Failure


John,
Along the lines of Tony's thinking but in the other direction ... maybe it could be a fault in your alternator overvolting the system. You could easily fit a voltmeter to your battery temporarily to watch the level of the voltage while on one of these long drives.

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Kev X450(c) T30 Guru
03 Titanium Ti T30 Series 1 **MODIFIED**
My Blog
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24/Jul/2010, 11:35 pm Link to this post Send Email PM   Send Private Message Blog
 
popeclement Profile
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X-TRAIL FANATIC
 


Date Registered: 07-2008
Location: Perth, WA
TOTAL POSTS: 476
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Re: ECU Failure


Thanks Kev

I am waiting for the paperwork but was told that they found a high resistance connection in the loom between the ECU and not sure where - possible a CAN bus signal line.

In any event I am not sure and neither were they absolutely confident themselves. Having worked on CAN bus equipment, connection issues are problematic, and this leaves me uneasy to say the least - next week I have a run to Esperance and Kalgoorlie which are not exactly close to an experiened Nissan dealer.

Really canvassing thoughts of changing either to a 2011 model or something else.

John

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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
- traded
26/Jul/2010, 8:44 am Link to this post Send Email PM   Send Private Message
 
popeclement Profile
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Date Registered: 07-2008
Location: Perth, WA
TOTAL POSTS: 476
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Re: ECU Failure


Well I hate to say it but the saga continues with the light reappearing this morning after a weekend of driving.

So it's back in at the dealer who have I believe contacted the WA State rep for Nissan.

Will update.

If you were in my position, would you wait for the new T32 and transfer the underbody plates I have on my current car (hopefully they are the same) or change completely to something like the new Mitsu ASX, new Tiguan when it comes out, Skoda Scout or wait for the Yeti? That's probably another thread.

John

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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
- traded
26/Jul/2010, 8:15 pm Link to this post Send Email PM   Send Private Message
 
popeclement Profile
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X-TRAIL FANATIC
 


Date Registered: 07-2008
Location: Perth, WA
TOTAL POSTS: 476
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Re: ECU Failure


The fault has been located to the wiring harness itself - running adjacent to the battery bay. The chief technician showed me where he is able to flex the harness and reproduce the MIL error light and which also interruptes communication to their diagnostic computer. He was able to strip the heat shrinking back to the offending wire which has a spliced connector (why-don't know).

A new harness has been ordered ex Japan so the vehicle will understandably be off the road for at least another two maybe three weeks which including the past two is significant.

Replacment of any wiring harness is always a pig of a job and this one looks to be just as onerous.

I have taken some photos and will post later. I have to say the techician who is investigating my vehicle has been extremely conscientious and has discused this with Nissan's master tech in Aust as well as taken home the manuals to study and he is now sure of this problem.

However time will tell and I will be requesting a round table meeting with the local Nissan representative.

A very interesting symptom of the lack of commn between the ECU and the EGR system is that the large diameter hose that is connected to the turbo and is connected to the cast plenum assembly on the LH front of the engine bay, has been developing considerable back pressure because of incorrect boost, as evidenced by the hose being forced back off the plenum.

Last edited by popeclement, 31/Jul/2010, 8:59 am


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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
- traded
31/Jul/2010, 8:53 am Link to this post Send Email PM   Send Private Message
 
Dadd Profile
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Date Registered: 06-2008
Location: New South Wales
TOTAL POSTS: 182
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Re: ECU Failure


John
You seem to have displayed a large amount pf patience during this saga and finally the fault in the wiring harness has been found!

I hope you are able to obtain a satisfactory result from Nissan in terms of compensation for the sheer amount of time your vehicle has been off the road.

Just wondering if you had considered the new Mitsu Challenger - nice size, full chassis and proper 4WD system?

Anyway hopefully you'll get better reliability out of the X Trail once the harness fault has been resolved.

---
Glenn X-889
2008 ST Manual
31/Jul/2010, 6:38 pm Link to this post Send Email PM   Send Private Message ICQ AIM
 
popeclement Profile
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Date Registered: 07-2008
Location: Perth, WA
TOTAL POSTS: 476
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Re: ECU Failure


Hi Glenn

Having been in the service business for a long time, I am patient but this has tested me.

Yes I am considering the Challenger as well as the new ASX. The Xtrail apart from this issue has been a good drive.

John

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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
- traded
31/Jul/2010, 10:03 pm Link to this post Send Email PM   Send Private Message
 
popeclement Profile
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Date Registered: 07-2008
Location: Perth, WA
TOTAL POSTS: 476
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Re: ECU Failure


I picked up my vehicle yesterday after an incredibly long saga.

To keep it short, not the fault of Nissan or dealer, but directly attributable to the installation of the Kenwood GPS/DVD system before I took delivery. Something about where the signals were being tapped into the harness.

Original deck is back in and installer settled with dealership to release my vehicle, as work was not covered by warranty.

I am left with a working car but an expensive GPS/DVD/ipod/TV system which I will have to separately negotiate a settlement with the supplier.

Upshot - I'm the 'glass half full man' - ECU has been flashed with the latest 2010 software and my confidence in the vehicle is much much better knowing the cause.

John

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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
- traded
17/Sep/2010, 8:11 am Link to this post Send Email PM   Send Private Message
 
andyp1971 Profile
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Date Registered: 06-2010
Location: Ashwood, Melbourne
TOTAL POSTS: 174
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Re: ECU Failure


John,

Great news that you have your exy back and the problem has been solved.

I guess it just goes to highlight how these complicated systems can get so twitchy these days and be so difficult to diagnose an issue.

The more I read on the forum in general, the harder I cross my fingers, toes, eyes, arms, legs that I can get through without my exy getting a headache or something. But of course the more complicated the system, the more likely an issue will develop.

At least you're back on the road.

Thanks for sharing your journey with me.

---
:) andyp

Toot toot chugga chugga big Flint car!

X-1628(c)
2010 T31 TS Flint, nudgie with bright eyes, light/bonnet protectors, mats, mud tray, parking beepy thing, tow, f/d/r boing plates, buggle-seat & window sox
17/Sep/2010, 12:19 pm Link to this post Send Email PM   Send Private Message
 
Robbo0001 Profile
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BANNED USER

Date Registered: 07-2008
Location: Brisvegas, Australia
TOTAL POSTS: 1063
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Re: ECU Failure


quote:

To keep it short, not the fault of Nissan or dealer, but directly attributable to the installation of the Kenwood GPS/DVD system before I took delivery. Something about where the signals were being tapped into the harness.


I would be pissed off, to put it midly

quote:

I am left with a working car but an expensive GPS/DVD/ipod/TV system which I will have to separately negotiate a settlement with the supplier.



Thats ridiculous...brand new car, brand new audio/visual sytem and a heap of bullshit.

Salute to you mate though, for having patience...I hope your Exy is the best car on the road, from here out

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Dave
99 GU Patrol 2.8TD
Ex-2002 T30 TI Xtrail
17/Sep/2010, 11:33 pm Link to this post Send Email PM   Send Private Message
 
popeclement Profile
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X-TRAIL FANATIC
 


Date Registered: 07-2008
Location: Perth, WA
TOTAL POSTS: 476
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Re: ECU Failure


Thanks for the support - you wouldn't ******g believe it - I did a 400km round trip to Bunbury yesterday and today around 3pm on a short drive the MIL light has come on again permanently.

This is now obviously very serious - interestingly enough and I have mentioned this to the dealer, I get one slight hesistation during gentle acceleration when going from say 80 to 100, and then the light comes on about 12 hours later.

I think it is time to have a round table session with a lawyer present. emoticon

John

---
X-916, VW Golf 90TSi manual, limestone grey, no extras
2008 TL dc i, manual, twilight; full set bash plates, jaos strut bar
- traded
18/Sep/2010, 8:34 pm Link to this post Send Email PM   Send Private Message
 


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