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Author Topic: ECU Managment Light  (Read 2000 times)

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OLDTIMER

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ECU Managment Light
« on: 27 December 2009, 15:01:58 »
Just changed cam shaft sensor on my 2.0ltr Mig and the ECU light is still on. It is still limiting revs to 3600ish ie safety mode.
Any ideas welcome.
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MIKE

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Re: ECU Managment Light
« Reply #1 on: 27 December 2009, 15:07:48 »
not sure if you need code reader to reset it,when i changed mi maf sensor the fault was still there till id reset the light
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CaptainZok

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Re: ECU Managment Light
« Reply #2 on: 27 December 2009, 15:16:05 »
If the light is still on you still have a fault.
You could do with getting the codes read with a code reader to see what it's complaining about.
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RobG

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Re: ECU Managment Light
« Reply #3 on: 27 December 2009, 15:17:15 »
Quote
Just changed cam shaft sensor on my 2.0ltr Mig and the ECU light is still on. It is still limiting revs to 3600ish ie safety mode.
Any ideas welcome.
I am assuming you `clipped it for codes prior to cam sensor fitting.
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Grumpy

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Re: ECU Managment Light
« Reply #4 on: 27 December 2009, 15:17:49 »
Quote
Just changed cam shaft sensor on my 2.0ltr Mig and the ECU light is still on. It is still limiting revs to 3600ish ie safety mode.
Any ideas welcome.

If the light is still on then the ECU is still receiving a live
fault.
Do a Paperclip Test and see what's bothering it.
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OLDTIMER

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Re: ECU Managment Light
« Reply #5 on: 27 December 2009, 15:22:26 »
Will give the clip test a try and get back soon.
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MIKE

OLDTIMER

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Re: ECU Managment Light
« Reply #6 on: 27 December 2009, 15:35:32 »
Code No :- 0340
Help with code please!
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RobG

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Re: ECU Managment Light
« Reply #7 on: 27 December 2009, 15:38:19 »
Cam sensor. Did you replace with genuine. If so re-check cabling and connections. When cam sensor is replaced successfully EML will automatically extinguish
« Last Edit: 27 December 2009, 15:39:18 by RobG »
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OLDTIMER

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Re: ECU Managment Light
« Reply #8 on: 27 December 2009, 15:43:56 »
It has been replaced with the GM modified one. This had been fitted prior to my owning the car. Have fitted the new cable that came with the replacement sensor and soildered the wires on to the same positions as before as the colour codes on the wires do not match for what ever reason!
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MIKE

RobG

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Re: ECU Managment Light
« Reply #9 on: 27 December 2009, 15:49:26 »

IIRC  the old to new type cam sensor conversion on the X20XEV  had, from memory an extra wire in the cable, which you need to earth.  :-/
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OLDTIMER

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Re: ECU Managment Light
« Reply #10 on: 27 December 2009, 15:55:11 »
You may just be correct in your assumpsion as I did notice the other wire but did ignore it. I will now go and connect said wire to ground+
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MIKE

OLDTIMER

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Re: ECU Managment Light
« Reply #11 on: 27 December 2009, 16:16:40 »
Just earthed it up ----- no response code still reading 0340.
Sensor bought from ebay 200360144426 Trusting that this is a reprutable source.
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MIKE

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Re: ECU Managment Light
« Reply #12 on: 27 December 2009, 16:23:05 »
Quote
Just earthed it up ----- no response code still reading 0340.
Sensor bought from ebay 200360144426 Trusting that this is a reprutable source.
Nope. Gotta go genuine.
« Last Edit: 27 December 2009, 16:23:44 by RobG »
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tunnie

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Re: ECU Managment Light
« Reply #13 on: 27 December 2009, 16:27:42 »
Quote
Quote
Just earthed it up ----- no response code still reading 0340.
Sensor bought from ebay 200360144426 Trusting that this is a reprutable source.
Nope. Gotta go genuine.

Indeed, even motorfactors sell stuff as 'geniune' when its not. Get yourself to a Vx dealer and get one  :y

I changed my cam sensor back in 2006 for geniune, had zero issues since  :)
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simon allen

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Re: ECU Managment Light
« Reply #14 on: 27 December 2009, 16:39:11 »
I've just had exactly the same problem on mine.. and fixed it today.
You will need a multimeter!!

Here are the autodata references I used. they may be of some help to you:
http://img686.imageshack.us/g/ecupinoutsforcps.jpg/

I measured the resistances of the sensor itself, then plugged it back in and measured the resistances at the ecu end (that diagram above shows you which pins they are connected to on the ecu) and found that one of the wires was reading a high resistance. I replaced this and now my miggy is running sweet :) Mine too was fitted with a modified cps.
You will find that your pattern part cps reads high on the resistances most likely as well. Timing belt tension has also been known to throw up this code aparently.
Hope the above is of some help for you
Simon
« Last Edit: 27 December 2009, 16:42:02 by simonallen »
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