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Mar 26, 2014 10:06:16 GMT
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 According to the Auto Electrician at a "Retro" Citroen garage I have just had a service at, I need a new ECU (as above), what is happening is the ABS, Service, Stop warning lights are on all the time, the MOT is due next month so it will fail even though I don't have a problem wit the ABS or anything, I had a look at the ECU yesterday (hence the photo) and it's only a 10 min job to change (some on e-bay at the moment). but if I put another one on from another car, will it work or does it need connecting up to a laptop again and programing ? It's a Citroen C5 2.0 lt HDI 2002 |
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Mar 26, 2014 12:01:33 GMT
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Most ecu faults can be solved by simply unplugging them cleaning the connectors with contact cleaner and reconnecting a few times;) I can't comment on that specific model but most modern ECUs are coded in some way and are unlikely to work if simply plugged in, they can be a curse word to change.
Have a google you can get it tested for about £35 if you can be without the car for a while.
There is a thread about the ABS warning light mot bit, from memory if you tape it over/ disconnect it then its only an advisorary.
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Mar 26, 2014 15:46:44 GMT
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At the very least, I would expect it to be coded with the immobiliser transponder and key chip, so swapping out the ECU alone will almost certainly not work.
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1986 Panda 4x4.
1990 Metro Sport.
1999 Ford Escort estate.
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Mar 26, 2014 18:53:17 GMT
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these buggers are multiplexed, I wouldn't think it was the engine ecu causing the issues but the multiplex unit.
unfortunately these cars do need Citroen's Lexia software as a generic OBD reader wont tell you anything whatsoever, however they are fantastically detailed systems when you do get them to talk to each other, you can configure and re-code all manners of systems and addons, even cycle the suspension up and down and make the horn sound!
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