Hi, has anyone on the forum replace an engine management ecu with a second hand one?
This ecu is in a petrol Xantia 2 litre, 8 valve. The car has the keypad immobiliser on the central console. The engine management ecu seems to have died...I have been hunting for a second hand one on the internet. One person says it is necessary to replace the immobiliser ecu as well as the engine management ecu because a replacement engine management ecu will not respond to a different immobilizer.
Does anyone know if this is true? More to the point has anyone out there installed a second hand engine management ecu, and did they have any problems with it?
cheers
Replacing Xantia ecu for engine management
Moderator: RichardW
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Richard Gallagher
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As far as the code is concerned, what you need to do is to find out what number code was being used on the immobiliser pad on the 'new' ecu, then simply set yours to the same number, job done.
I've swopped pads from diesel to petrol cars by this method without problems.
I've swopped pads from diesel to petrol cars by this method without problems.
Berlingo Multispace 05 1.6 HDI
Picasso 02 HDI SX
Xantia 97 TD VSX
Xantia 96 Activa
Picasso 02 HDI SX
Xantia 97 TD VSX
Xantia 96 Activa
There are specialist ECU repairers and testers - google search will keep you busy for hours but samples:
http://www.bba-reman.com/
http://www.carelect.demon.co.uk/frame.html
Latter I think does a testing service at a reasonable price.
Recon is probably better than substitution as you're never sure what you are getting. Having said that ECU's seem remarkable reliable with the exception of some used for Xantia ABS.
http://www.bba-reman.com/
http://www.carelect.demon.co.uk/frame.html
Latter I think does a testing service at a reasonable price.
Recon is probably better than substitution as you're never sure what you are getting. Having said that ECU's seem remarkable reliable with the exception of some used for Xantia ABS.
jeremy
xantia ecu replacement...the continuing saga
The continuing story...car is a 1996 Xantia with the 2 litre, 8 valve petrol Peugeot motor. I am near Canberra, Australia.
I have obtained a second hand engine management ecu from a Peugeot 306, which had no keypad. It is exactly the same Magneto Marelli IAW8P.20 ecu, down to the last reference number as was installed in the Xantia. I am told the car it came out of was working when the ecu was removed.
When the ecu was plugged into the Xantia, the car won't start. The spark plugs are sparking, the fuel pump is pumping, the injectors are vibrating (to indicate they are working) but the car does not start. (This is at least better than the old ecu which would not get the fuel pump activated.)
When initially plugged in, the immobilizer light was green, without my coding in the code number. When coding in the number, the immobilizer light again shows green. I have subsequently deactivated the immobilizer by changing the code to 0000. None of this makes the car start.
Help! Has anyone any suggestions about why the car won't work with the replacement ecu? Things to check?
I have obtained a second hand engine management ecu from a Peugeot 306, which had no keypad. It is exactly the same Magneto Marelli IAW8P.20 ecu, down to the last reference number as was installed in the Xantia. I am told the car it came out of was working when the ecu was removed.
When the ecu was plugged into the Xantia, the car won't start. The spark plugs are sparking, the fuel pump is pumping, the injectors are vibrating (to indicate they are working) but the car does not start. (This is at least better than the old ecu which would not get the fuel pump activated.)
When initially plugged in, the immobilizer light was green, without my coding in the code number. When coding in the number, the immobilizer light again shows green. I have subsequently deactivated the immobilizer by changing the code to 0000. None of this makes the car start.
Help! Has anyone any suggestions about why the car won't work with the replacement ecu? Things to check?
If you got spark at plugs -
& and fuel at injectors -
Then the car is NOT immobilised. Forget about the immobliser and ECU. You have some kind of a very basic timing problem on the engine.
Like a snapped cambelt or snapped cam.
When doing the engine timing check and setup :
do NOT use the dovel hole in the crank pulley.
I repeat :
do NOT use the dovel hole in the crank pulley.
Reason is the belt pulley is vulcanised on to the center part. The rubber breaks up over time and allows the pulley and timing hole to move - anywhere and as much it likes.
Instead use the dovel timing hole behind/under the starter motor into the flywheel.
& and fuel at injectors -
Then the car is NOT immobilised. Forget about the immobliser and ECU. You have some kind of a very basic timing problem on the engine.
Like a snapped cambelt or snapped cam.
When doing the engine timing check and setup :
do NOT use the dovel hole in the crank pulley.
I repeat :
do NOT use the dovel hole in the crank pulley.
Reason is the belt pulley is vulcanised on to the center part. The rubber breaks up over time and allows the pulley and timing hole to move - anywhere and as much it likes.
Instead use the dovel timing hole behind/under the starter motor into the flywheel.
Anders (DK) - '90 BX16Image