New ecu????
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Thread: New ecu????

  1. #1
    Fellow Frogger! tasie C5's Avatar
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    Default New ecu????

    Just heard from my service people who were trying to diagnose an "ENGINE MANAGEMENT FAULT" on the car during a scheduled service. I had asked them to look into the fault.
    They sent all the engine data to the Citroen who have said that a new ECU is required. I have instructed them to reassemble the parts and I will drive the car with the fault showing. Prior to this service the car was sluggish but would cruise at normal speed limits but had no power for overtaking ( no turbo ) and the cruise would not come off PAUSE.
    The price for a new ECU was quoted at $3,000.
    My own investigations into the problem have led me to a vacuum system fault. They tested the vacuum and all was OK.
    For all the good intentions of the service agent ( they have lent me a car for the period out of action) I believe they are just not familiar with the C5, and therefor have had a steep learning curve. They also, I believe have to liaise with Singapore ( Sime-Derby?) to get any help.
    Has anyone had this problem with an X7? Any constructive suggestions. What are the problems when another ECU is fitted to the car.( compatibility of ignition keys etc). Are they dedicated to the cars Vin? I think this forum has much more knowledge than the agent.
    Allan.

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    Last edited by tasie C5; 12th July 2016 at 05:34 PM.

  2. #2
    Fellow Frogger! tasie C5's Avatar
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    Is there a code on an engine analyser they tells that the ECU needs replacing. Or do mechanics assume this will cure all. If there is such a code what is it? If the ECU has had it this code would eliminate a lot of chasing of spurious fault codes.

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    Fellow Frogger! andrewj's Avatar
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    Quote Originally Posted by tasie C5 View Post
    Is there a code on an engine analyser they tells that the ECU needs replacing. Or do mechanics assume this will cure all. If there is such a code what is it? If the ECU has had it this code would eliminate a lot of chasing of spurious fault codes.
    Hi Tassie C5,

    If it is of any encouragement, I am driving around a Peugeot 406 Coupe, which I picked up very cheap because the local specialist wanted to replace the ECU. Turns out it was a bad joint in a power supply. 1.5M length of wire between the +VE terminal of the battery and poked into the back the terminal in question and ta da ... running like a dream 18months

    So persist and get to the bottom of it - I'm sure that with a bit logical thought and help from the forum you will sort it out...

    Cheers,
    Andrew
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  4. #4
    Contented Peugeot Driver addo's Avatar
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    If buying a used ECU, you need to match the engine/transmission, also be sure to get two remote keys, all locks (doors, ignition, petrol cap, glovebox etc as appropriate), dash cluster, BSI (control unit under dash).

    You will also need to know the VIN of your donor and have access to the secure code for configuring keys, "just in case".
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  5. #5
    Contented Peugeot Driver addo's Avatar
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    Giving the diagnosis more thought...

    You should be able to perform actuation tests via DiagBox on the wastegate solenoid, if it works then you know the driver transistor is OK, and the signal path satisfactory. Check your MAP reading isn't low, a restricted exhaust could also be something to look at.

    Personally I would start with all the actuation tests, if they are OK but no poke, then I'd look at fuel pressure readings on the rail and injector correction. If these are flaky (compared to the cited range of figures), I'd supply diesel to the filter via a jerry can strapped in the car and a 12V low pressure pump, and test drive.

  6. #6
    Fellow Frogger! BallinaOB's Avatar
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    Hi,
    Might be worth your while contacting Logicar in either Hobart or Launceston to have the ECU tested. From their website it looks like they may be able to rebuild yours which could save money and the hassle of replacing keys etc.
    Logicar
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  7. #7
    Fellow Frogger! tasie C5's Avatar
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    Great response. Thanks.

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    Fellow Frogger! Ceenine's Avatar
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    Allan, Which engine do you have

    Don
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  9. #9
    Fellow Frogger! tasie C5's Avatar
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    Hello Don.
    2 LITRE DHH. AUTO. 2010.( VIN.VF7RDRHHAAL550372.( ENGINE DYXS4000842.

  10. #10
    Contented Peugeot Driver addo's Avatar
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    RHH. 16 valve HDi, 163 stated HP.

  11. #11
    Fellow Frogger! tasie C5's Avatar
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    Thanks addo.

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    Fellow Frogger! Ceenine's Avatar
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    Allan, I have a Lexia diagnostic tool software and a DW10CTED4 X7m (2011 C5 tourer). If you can get over this way and some components are similar we could analyse and swap easy items such as air analyser (forget technical term) etc. I think your motor may be DW10BTED4.
    Don
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    Fellow Frogger! Ceenine's Avatar
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    Allan, looks like the same motor as mine!
    Don
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    Contented Peugeot Driver addo's Avatar
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    Just having two people on it can help, sometimes you need to feel a component during an actuation test to make sure it is clicking or buzzing as desired.

    Remember how the "unfixable mystery fault" of that chap near Bracknell was actually just restricted fuel supply, as also this week for the 308 pilot in NZ. Check your live parameters as it runs/drives, another good thing to try with a passenger on the laptop.

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    RHH is a DW10CTED4 engine.
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    Fellow Frogger! tasie C5's Avatar
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    Thanks for your kind offer Don. When would be convenient for a visit? Sounds like a plan. Allan.
    I will PM you.

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    let me know when so i can come too
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    Fellow Frogger! tasie C5's Avatar
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    Ceenine & Balki. The car is still with the dealer who has just informed me it should be ready for me to pick up in a few days.

    On another theme, the car they loaned me is a Hyundai Sonata, brand new. Having only driven Citroens for the past 12 years and being able to sample a new car that seem to be proliferating in AU I was quite interested to see how it compares. First impression was the amount of space it has, it must be longer than the C5. It had most of the bells and whistles ( in fact too many tunes are played).
    Around town it is easy and quiet, smooth transmission etc. Fit and finish are good The ride seemed quite good so first impressions surprised me.
    We then did the St helens - Hobart -Launceston -St Helens trip and did not enjoy the drive. Both my wife an I remarked on the difference in comfort over long distances. She often chides me over my choice of the C5'. She would like an SUV like all her friends seem to drive. However she now appreciates why I chose the C5.
    The Hyundai Is a mid $30k car. If it was optioned up to the same spec as my C5 it would be in the late $40k's. There is no comparison in my ( objective ) opinion. Whilst I am not knocking the Sonata as a vehicle it is hard to comprehend why so few C5's are sold. Also the ratings given to each of them by motoring journalists, the Sonata rating higher than the C5. I suppose very few people use their cars for long journeys and also the perceived strangeness of the Citroen brand. Long term tests by German motoring journalists rate the C5 highly and is one of their preferred long distance commuters. Allan,
    Last edited by tasie C5; 15th July 2016 at 05:19 PM.
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    Default Road Tests

    Quote Originally Posted by tasie C5 View Post
    Ceenine & Balki. The car is still with the dealer who has just informed me it should be ready for me to pick up in a few days.

    On another theme, the car they loaned me is a Hyundai Sonata, brand new. Having only driven Citroens for the past 12 years and being able to sample a new car that seem to be proliferating in AU I was quite interested to see how it compares. First impression was the amount of space it has, it must be longer than the C5. It had most of the bells and whistles ( in fact too many tunes are played).
    Around town it is easy and quiet, smooth transmission etc. Fit and finish are good The ride seemed quite good so first impressions surprised me.
    We then did the St helens - Hobart -Launceston -St Helens trip and did not enjoy the drive. Both my wife an I remarked on the difference in comfort over long distances. She often chides me over my choice of the C5'. She would like an SUV like all her friends seem to drive. However she now appreciates why I chose the C5.
    The Hyundai Is a mid $30k car. If it was optioned up to the same spec as my C5 it would be in the late $40k's. There is no comparison in my ( objective ) opinion. Whilst I am not knocking the Sonata as a vehicle it is hard to comprehend why so few C5's are sold. Also the ratings given to each of them by motoring journalists, the Sonata rating higher than the C5. I suppose very few people use their cars for long journeys and also the perceived strangeness of the Citroen brand. Long term tests by German motoring journalists rate the C5 highly and is one of their preferred long distance commuters. Allan,

    Commonly known as 'Chequebook Journalism'.....but as we know if they admit it someone would have to face the music.........Some Journalists 'appear' to me to be 'tone deaf'.

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