Tdv6truck
Member Since: 05 Aug 2015
Location: Victoria
Posts: 19
  
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| Engine system fault and cruise control doesn't work now |
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Hi guys. The last few days I get the engine system fault message flash up on the dash (for a split second before disappearing) and I loose power. The engine keeps running. I can pull over and stop for a couple of seconds, leaving the car in drive with the engine running and then drive off and everything is fine. This is happening after starting the car within 4 km of driving every time now. None of the warning lights are on either.
Nay thoughts on what I can check before heading off to get the codes scanned? It's late 2006 disco 3 tdv6.
Cheers
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 21st Feb 2018 10:36 am |
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Globetrotter448
Member Since: 21 Mar 2017
Location: Londonderry NSW
Posts: 1783
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The codes will determine what may be wrong otherwise it is all guess work. As it is at startup, maybe battery or alternator but codes should tell
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| 21st Feb 2018 10:58 am |
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XDAndy
Member Since: 16 Jan 2018
Location: Gibraltar
Posts: 597
  
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Hi,
That s sounds exactely like the problem I had that I posted on
here
Bodsy kindly IID scanned my car that pointed to a turbo issue; sticking turbo actuator arm
Think I linked the relevant posts in the above
Since I got it moving and greased it with aluminium grease, it’s been perfect
If I remember correctly, if the ecu picks up an issue, doesn’t it then disable cruise control until the fault is cleared? Pretty sure that happened to my wife’s Nissan even though the mil light would go off, the fault was still in the ecu so no cruise control until dealer reset it.
You can do the turbo thing pretty quick.
Forum posts talk of taking left hand front wheel off, but I managed it by putting car into off road height, jacking up the left hand side and putting a support post in, and the upper wishbone drops away mor than enough to get the heat shield off easily.
After that it is all just about identifying the turbo arm and giving it a shoogle until it’s free; wd40 lush aluminium grease on bodsy’s advice.
Have a vid and pics if the forum post ones are not enough
Andy
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| 21st Feb 2018 6:06 pm |
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Tdv6truck
Member Since: 05 Aug 2015
Location: Victoria
Posts: 19
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Just a quick update. Had the codes read today. Has p0046-00 and another one for the MAF but I can’t remember the code. The MAF looks ok and the intercooler hose isn’t split. Is there a way to test the MAF? I’ll check the actuator arm this weekend.
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| 26th Feb 2018 8:45 am |
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XDAndy
Member Since: 16 Jan 2018
Location: Gibraltar
Posts: 597
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These are the codes Bodsy found after my car went into limp mode
Quote:Engine TDV6
P0579-00 [28] Speed control multi-function input A - circuit range/performance
P0046-00 [68] Turbo/supercharger boost control solenoid - circuit range/performance
The p0046 one was the code that called for the MIL light to be lit, and was the issue that caused the car to go into limp mode.
That, he felt, was related to the turbo actuator arm so when you accelerate and the “system” is expecting power delivery, the resulting relative lack of power from the turbo not kicking in as it should causes the error to be thrown.
All way beyond me, but that’s my understanding of what Bodsy was trying to tell me.
Anyway, I cleaned up the actuator, greased it with spray aluminium grease as he suggestt3d, and the car does fell a heck of a lot more responsive.
I’ve gotten an IID BT tool now, and so far there has been no recurrence of the P0046-00 error, so I’m hoping it’s fixed - for the moment .....
Now, there is apparently an ECU update that adds a turbo actuator exerciser function, and this causes the actuator to move through its full range of movement when turning the ignition on or off, or something like that. In any event, it’s suppossed to help keep the turbo actuator arm mobile to prevent this happening again.
Planning on requesting the update from Gap Diagnostics this week, after I do a couple of practice flashes on simple stuff.
Will see how it all goes I guess.
Good luck with this, and I’d be interested in knowing what you find out
Andy
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| 26th Feb 2018 11:10 am |
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Tdv6truck
Member Since: 05 Aug 2015
Location: Victoria
Posts: 19
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Great news!!! All fixed. Bought an ICarsoft i930 and it showed a MAF fault. Replaced the MAF and running like a dream. 
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| 5th Mar 2018 3:07 am |
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