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Unable To Read Ecu.


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#1 chris_uk

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Posted 30 July 2016 - 07:00 PM

got a little bit of a tricky one here. 

 

on the way to the national my car cut out.. the dash lights died and the battery light flickered for a couple seconds and then died also. I turned the key off and the engine carried on running eventually stalling out in front of the Emmerdale studios :lol:

 

after sat outside for a couple hours i tracked the problem down to a short from the alternator to the manifold, when i was re-building it on the friday the dipstick came out of the sump and when i pushed it back in i must of got it in between the cable and the block pulling the alternator cable tight against the manifold and eventually after some 15 miles the vibrations from the car wore trough the sleeving and made contact with the manifold. after some how managing to take the alternator off and fixing the cable as not to short out again i tried starting the car and it wouldn't fire.  

 

i plugged opcom in and i couldnt read the ECU, i could read the immobiliser and it came up with no connection to W-line.. at this point i called defeat and got towed home. 

 

finally got around to diagnosing the issues.

 

if i turn on the ignition i get all the usual sounds and the fuel pump would start as normal etc but i wasn't getting fuel pressure in the line.

 

  • i have reset the ECU, transponders and the transponder ring and reprogrammed them all up, the transponders do fail when programming but when you go back in it says its programmed.
  • i have tried re-programming a 2nd hand transponder
  • i have tried a second hand transponder ring and that made no difference. 
  • i have tried to read another ecu and it wouldn't read that either.
  • i have tried a new fuel pump relay, no difference
  • i have tried bypassing the ecu relay, no difference

 

i tested for continuity through the battery and i did get a bleep which would suggest a short, but i have tried again and now cant get any beep. 

 

i also tested the resistance and when you pull out the ECU fuse the resistance goes from 12.91 - 16.50.

 

has anyone come across this before?



#2 CHILL Gone DUTCH

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Posted 30 July 2016 - 07:04 PM

Alternator failure can throw some strange things out there chris Worth trying a spare one just to confirm if it is or not

Edited by CHILL Gone DUTCH, 30 July 2016 - 07:05 PM.


#3 chris_uk

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Posted 30 July 2016 - 07:07 PM

tired it without the alternator and the problem remains. 



#4 CHILL Gone DUTCH

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Posted 30 July 2016 - 07:12 PM

Was it disconnected completely ?

#5 The Batman

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Posted 30 July 2016 - 07:12 PM

Take it to Jon seal sport cars bud they will sort it

#6 chris_uk

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Posted 30 July 2016 - 07:18 PM

Take it to Jon seal sport cars bud they will sort it

 

:sleep:



#7 chris_uk

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Posted 30 July 2016 - 07:18 PM

Was it disconnected completely ?

 

yes, completely. as in it was sat on the floor



#8 vocky

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Posted 30 July 2016 - 07:23 PM

Ecu is probably fried.

#9 chris_uk

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Posted 30 July 2016 - 07:30 PM

Ecu is probably fried.

 

i tried a 2nd ecu and could read that either.. 

 

i do plan to try my ecu on another car and see if i can read it through that.. that would at least eliminate the ECU being fried.



#10 vocky

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Posted 30 July 2016 - 07:33 PM

The immobiliser has its own pin on the diagnosis socket, so only sends a signal to the ecu. Try a matched ecu set.

#11 CHILL Gone DUTCH

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Posted 30 July 2016 - 07:34 PM

Have you still got your old CS mapped Ecu Will have same immobiliser codes etc

Edited by CHILL Gone DUTCH, 30 July 2016 - 07:34 PM.


#12 chris_uk

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Posted 30 July 2016 - 07:35 PM

nope, its the same ECU.



#13 chris_uk

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Posted 30 July 2016 - 07:36 PM

The immobiliser has its own pin on the diagnosis socket, so only sends a signal to the ecu. Try a matched ecu set.

 

 

im sure that i tried that but i will just go out now and check. 



#14 The Batman

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Posted 30 July 2016 - 07:38 PM

Are you ysingnwidnpws 10?

#15 The Batman

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Posted 30 July 2016 - 07:39 PM

Using Windows 10

#16 chris_uk

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Posted 30 July 2016 - 08:16 PM

The immobiliser has its own pin on the diagnosis socket, so only sends a signal to the ecu. Try a matched ecu set.

Tried the matched set and the same. However.. When i tested continuity from ecu ground to live i got a bleep.. So something is shorting somewhere.. i shall track that short down in the morning..

#17 The Batman

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Posted 30 July 2016 - 08:17 PM

With Windows 10 try a different combinations of years ok op com

#18 CHILL Gone DUTCH

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Posted 30 July 2016 - 08:19 PM

The immobiliser has its own pin on the diagnosis socket, so only sends a signal to the ecu. Try a matched ecu set.

Tried the matched set and the same. However.. When i tested continuity from ecu ground to live i got a bleep.. So something is shorting somewhere.. i shall track that short down in the morning..
How many ohms

#19 techieboy

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Posted 30 July 2016 - 08:19 PM

Are you sure you can even mess with the immobiliser setup on an OBDTuner ECU? I thought somebody mentioned something about Peter changing things to stop pairing a new/different setup. :unsure:

#20 chris_uk

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Posted 30 July 2016 - 08:26 PM

i sent an email to peter and he said just reprogram it.. so i assume you can. 

 






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