 | Home > Technical > Idiots guide how the ECU functions |
 
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| Dave Bellis Member Since: 21 May 2014 Location: Shrewsbury Posts: 133   
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Being relatively new to Defender ownership it has rekindled my interest in vehicles...I am interested to find out if there is any information on how the ECU functions, makes its decisions and what sensors and switches it is connected to...
Thanks for any info... Dave |
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8th Jul 2015 9:38am |
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| Caterham Member Since: 06 Nov 2008 Location: Birmingham Posts: 6298  
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have a look here;
http://www.defender2.net/forum/topic34104.html?highlight=ecm |
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8th Jul 2015 10:28am |
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| Caterham Member Since: 06 Nov 2008 Location: Birmingham Posts: 6298
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I may be wrong but I believe it's the process rate you're referring to and not the number of lines of data.
Last edited by Caterham on 8th Jul 2015 6:55pm. Edited 1 time in total |
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8th Jul 2015 5:17pm |
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| scotty38 Member Since: 21 May 2011 Location: Lincolnshire Posts: 571 
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eh? 18000 lines of code is 18000 lines of code irrespective of how fast it's processed isn't it?
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8th Jul 2015 6:37pm |
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| Caterham Member Since: 06 Nov 2008 Location: Birmingham Posts: 6298
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Yes you're right - what I was trying to say was I believe the process rate is 18,000 something and not the amount of data held in the ecm.
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8th Jul 2015 6:56pm |
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| Macpaul Member Since: 25 Mar 2013 Location: SW Surrey Posts: 439 
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God knows I know little enough about computers but I think we might be making slightly heavy weather of this.
In answer to the original question, there is online somewhere a diagram of the inputs and outputs of the old Lucas ECU on the TD5, so maybe there is one somewhere for the tdci. I don't know where that might be. Possibly the workshop wiring diagram. The code comment was really to hint at the processing power of the ECU, which is apparently capable of employing 18,000 lines of code to adjust and respond to a good number of varying engine parameters many times a second in what is a physically hostile environment. Relatively, that may be no biggie these days(?) but I'm old enough for that still to boggle the mind a bit. 2003 Td5 110 Hardtop Now a 2013 110 USW too. |
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9th Jul 2015 5:20am |
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| blackwolf Member Since: 03 Nov 2009 Location: South West England Posts: 17372 
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Have you tried typing "How does an ECU work" into Google?
You'll find a lot of information already on the web, and they all work in much the same way. |
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9th Jul 2015 7:35am |
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| discomog Member Since: 09 May 2015 Location: Notts/Lincs Border Posts: 2526 
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Blackwolf is correct, loads of stuff on t'interwebby, I was searching this topic only last week but there's that much information I decided to come back to it when the cold winter nights set in. I'd rather be out playing with my toys this time of year. Good luck with your searches.
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9th Jul 2015 7:47am |
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| Dave Bellis Member Since: 21 May 2014 Location: Shrewsbury Posts: 133
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thanks for the replies, I must have a lot of time on my hands but I hate "black Boxes" I need to know how stuff works...
I'll wait until winter and trawl the internet.... Thanks Dave |
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9th Jul 2015 9:14am |
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