ecu removal

fuller0554 · May 6th, 2013, 21:06

Hi all. Ive got an 850 tdi and was wondering if i remove my ecu is there a time limit on having it unplugged or does it not matter. i dont intend to have it out for days but i dont want to take it out and put it back to or find it wont start or all the lights are on on the dash.

Antz · May 6th, 2013, 21:08

Never had that problem myself but then Ive only had it removed for a few minutes whilst swapping them over between cars.

fuller0554 · May 7th, 2013, 05:19

So if i was to say i should need to have it out for hlf an hour to an hour, probably wont be that long but just to be safe, will this be ok. im just trying to be safe rather than sorry really, its one of them things that is great if nothing goes wrong but if something does happen then your stuffed which leads me to my next question.... Can ecu's be change for another thats the same without any problems ie unplug mine then plug in another ecu and thats it.

RiPsTa33 · May 7th, 2013, 07:18

You can leave it out as long as you want and the worst is you will clear any error codes stored in the ecu

960kg · May 7th, 2013, 11:54

There is only one rule for removing ECU`s and that is you have to give 150 seconds after you have switched off the ignition before you remove it.

If you have an immobiliser fitted then it`s 240 seconds.

This is to allow the electric current to dissipate through the relays etc.

Purdydog · May 11th, 2013, 19:27

I've been trying to find info on ECU removal myself.

Had a go this afternoon without success. Then I found this video :-

ARD Tuning Removal Tool

Seems like there's a special tool (as always) Has anyone improvised? Seems like it should e possible to knock one up quite easily.

Oops ignore above misread your post, the above only affects V70's 1999 onwards.

klausc · May 12th, 2013, 18:25

Quote:

Originally Posted by fuller0554

So if i was to say i should need to have it out for hlf an hour to an hour, probably wont be that long but just to be safe, will this be ok. im just trying to be safe rather than sorry really, its one of them things that is great if nothing goes wrong but if something does happen then your stuffed which leads me to my next question.... Can ecu's be change for another thats the same without any problems ie unplug mine then plug in another ecu and thats it.

Before removing the ECU, I strongly suggest disconnecting the negative battery cable and waiting a few minutes. No, it matters not how long the ECU is disconnected so long as the connector terminals do not get wet.

May 6th, 2013, 21:06	#1
fuller0554 Member Last Online: May 21st, 2018 13:20 Join Date: Jun 2011 Location: oswestry	ecu removal Hi all. Ive got an 850 tdi and was wondering if i remove my ecu is there a time limit on having it unplugged or does it not matter. i dont intend to have it out for days but i dont want to take it out and put it back to or find it wont start or all the lights are on on the dash. Last edited by fuller0554; May 6th, 2013 at 21:08.

May 6th, 2013, 21:08	#2
Antz No I'm not the redhead Last Online: Nov 25th, 2022 09:49 Join Date: Jun 2009 Location: North Yorkshire Coast	Never had that problem myself but then Ive only had it removed for a few minutes whilst swapping them over between cars. __________________ 1988 Volvo 240 GLT T5 Swap a T5 motor into your RWD Volvo:The Guide

May 7th, 2013, 07:18	#4
RiPsTa33 Trader Last Online: Jul 7th, 2022 15:22 Join Date: Jan 2007 Location: Shildon	You can leave it out as long as you want and the worst is you will clear any error codes stored in the ecu __________________ ABS Ecu Repairs £25 850 T5 304 Chip £80

May 11th, 2013, 19:27	#6
Purdydog Yorkshire Exile Last Online: Nov 5th, 2019 13:18 Join Date: Nov 2010 Location: Exeter, Devon	I've been trying to find info on ECU removal myself. Had a go this afternoon without success. Then I found this video :- ARD Tuning Removal Tool Seems like there's a special tool (as always) Has anyone improvised? Seems like it should e possible to knock one up quite easily. Oops ignore above misread your post, the above only affects V70's 1999 onwards. __________________ 1999 Volvo V70 SE 2.4 non turbo Petrol - manual gearbox... 208k miles & counting....Deceased - the dreaded ETM.... 1996 850 tdi glt 132k Last edited by Purdydog; May 11th, 2013 at 20:24. Reason: Misread Post

May 7th, 2013, 05:19	#3
fuller0554 Member Last Online: May 21st, 2018 13:20 Join Date: Jun 2011 Location: oswestry	So if i was to say i should need to have it out for hlf an hour to an hour, probably wont be that long but just to be safe, will this be ok. im just trying to be safe rather than sorry really, its one of them things that is great if nothing goes wrong but if something does happen then your stuffed which leads me to my next question.... Can ecu's be change for another thats the same without any problems ie unplug mine then plug in another ecu and thats it.

May 7th, 2013, 11:54	#5
960kg Premier Member Last Online: Dec 28th, 2022 12:25 Join Date: Jun 2009 Location: Mercville	There is only one rule for removing ECU`s and that is you have to give 150 seconds after you have switched off the ignition before you remove it. If you have an immobiliser fitted then it`s 240 seconds. This is to allow the electric current to dissipate through the relays etc.

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