if i change my ECU will the alarm still work ok?
20 April 2006, 07:36 PM
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if i change my ECU will the alarm still work ok?
seem to recall something about the keys/imobilser needs re-programming or something like that?
i guess the alarm fob is something all on it's own or does something need to be done to this aswell?
or will all be fine if i just plug it in and drive off?
ta
i guess the alarm fob is something all on it's own or does something need to be done to this aswell?
or will all be fine if i just plug it in and drive off?
ta
21 April 2006, 09:50 AM
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Which ECU are you referring to and what model and year is the vehicle?
Engine management ECUs are matched to several other components to prevent vehicle theft by swapping components out of similar vehicles.
The Alarm ECU is matched to the Radio Keys, without programming your Radio Keys to a new Alarm ECU then you will not be able to switch the alarm from the Radio Keys.
SS
Engine management ECUs are matched to several other components to prevent vehicle theft by swapping components out of similar vehicles.
The Alarm ECU is matched to the Radio Keys, without programming your Radio Keys to a new Alarm ECU then you will not be able to switch the alarm from the Radio Keys.
SS
thats why i changed everything in my uk97 for the P1 items/ engine/loom/dash etc etc....
21 April 2006, 01:15 PM
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Originally Posted by Sigma Sam
Which ECU are you referring to and what model and year is the vehicle?
Engine management ECUs are matched to several other components to prevent vehicle theft by swapping components out of similar vehicles.
The Alarm ECU is matched to the Radio Keys, without programming your Radio Keys to a new Alarm ECU then you will not be able to switch the alarm from the Radio Keys.
SS
Engine management ECUs are matched to several other components to prevent vehicle theft by swapping components out of similar vehicles.
The Alarm ECU is matched to the Radio Keys, without programming your Radio Keys to a new Alarm ECU then you will not be able to switch the alarm from the Radio Keys.
SS
the alarm ecu, is that separate to the main one or part of it?
if an ECU swap means reprogramming the keys to the new ECU, is this a job that can be done myself or is it a dealer/alarm specialist jobbie?
ta
spec'c'57- don't want to go THAT mad mad mate
21 April 2006, 01:37 PM
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The alarm ECU is separate, so aslong as you don't touch that ,then no need to worry about the alarm or Radio Keys.
With regard to the Engine ECU though, this could be trickier.
I know on new age UK models that this would cause problems unless you have 3 other matched components.
On the 99MY though, the ignition key housing still holds a transponder chip, this is read by a receiver on the steering column and the engine ECU then acts as an additional immobilisation circuit.
The "maybe" here, is if the transponder chip in the keys is matched to the receiver ( in which case you will be ok), or matched to the engine ECU which I think will be more likely and cause you problems without the matched chips for the ECU that you intend to use.
However, it may be that the ECU you are intending to fit has had the immobilisation aspect de-programmed if its been upgraded (its not Thatcham approved - hence the need for a Cat 1) or may not even have the immobilisation feature if its a non UK engine ECU.
Unfortunately the ins and outs of the engine ECU, beyond standard UK ones, are an unkwnown for me.
SS
With regard to the Engine ECU though, this could be trickier.
I know on new age UK models that this would cause problems unless you have 3 other matched components.
On the 99MY though, the ignition key housing still holds a transponder chip, this is read by a receiver on the steering column and the engine ECU then acts as an additional immobilisation circuit.
The "maybe" here, is if the transponder chip in the keys is matched to the receiver ( in which case you will be ok), or matched to the engine ECU which I think will be more likely and cause you problems without the matched chips for the ECU that you intend to use.
However, it may be that the ECU you are intending to fit has had the immobilisation aspect de-programmed if its been upgraded (its not Thatcham approved - hence the need for a Cat 1) or may not even have the immobilisation feature if its a non UK engine ECU.
Unfortunately the ins and outs of the engine ECU, beyond standard UK ones, are an unkwnown for me.
SS
Last edited by Sigma Sam; 21 April 2006 at 01:39 PM.
21 April 2006, 06:58 PM
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Originally Posted by Sigma Sam
The alarm ECU is separate, so aslong as you don't touch that ,then no need to worry about the alarm or Radio Keys.
With regard to the Engine ECU though, this could be trickier.
I know on new age UK models that this would cause problems unless you have 3 other matched components.
On the 99MY though, the ignition key housing still holds a transponder chip, this is read by a receiver on the steering column and the engine ECU then acts as an additional immobilisation circuit.
The "maybe" here, is if the transponder chip in the keys is matched to the receiver ( in which case you will be ok), or matched to the engine ECU which I think will be more likely and cause you problems without the matched chips for the ECU that you intend to use.
However, it may be that the ECU you are intending to fit has had the immobilisation aspect de-programmed if its been upgraded (its not Thatcham approved - hence the need for a Cat 1) or may not even have the immobilisation feature if its a non UK engine ECU.
Unfortunately the ins and outs of the engine ECU, beyond standard UK ones, are an unkwnown for me.
SS
With regard to the Engine ECU though, this could be trickier.
I know on new age UK models that this would cause problems unless you have 3 other matched components.
On the 99MY though, the ignition key housing still holds a transponder chip, this is read by a receiver on the steering column and the engine ECU then acts as an additional immobilisation circuit.
The "maybe" here, is if the transponder chip in the keys is matched to the receiver ( in which case you will be ok), or matched to the engine ECU which I think will be more likely and cause you problems without the matched chips for the ECU that you intend to use.
However, it may be that the ECU you are intending to fit has had the immobilisation aspect de-programmed if its been upgraded (its not Thatcham approved - hence the need for a Cat 1) or may not even have the immobilisation feature if its a non UK engine ECU.
Unfortunately the ins and outs of the engine ECU, beyond standard UK ones, are an unkwnown for me.
SS
have a thread going in tech. on this and a guy with ukmy00 has swapped his std for PPP and had no problemsthanks again, been a great help
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22 April 2006, 09:25 AM
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Originally Posted by Bob Rawle
The MY99-00 ecu' have no part to play in the immobilser key recognition and you can swap ecu's around (UK-UK) without issue.
bob
bob
thanks for clarifying that bob
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