Changing an ECU question

1. sam_colbear Regular Poster Joined: Aug 2009 Posts: 456

   #1 10th February 2011, 20:46

   Hi people,
   
   Ive just bought an unlocked ecu (thanks DusheR) as i have a bloody flashing key on my dash and citroen say they can reprogramme my key. So to fit the unlocked ECU do i need to disconnect the battery, remove old ecu, transponder box and the aerial around the ignition barrell. Then plug in the unlocked ECU, connect the battery and start the car?
   
   is this correct??
   
   thanks
   
   sam
2. user_15516 Saxperience Post Whore Joined: Apr 2007 Posts: 6640 Integra DC5R & VTS

   #2 10th February 2011, 21:28

   If it's unlocked, you can literally unplug the old ECU and fit the new one. Don't think you need to fart on disconnecting the battery.
3. sam_colbear Regular Poster Joined: Aug 2009 Posts: 456

   #3 10th February 2011, 22:00

   Quote:

   Originally Posted by LeeumH If it's unlocked, you can literally unplug the old ECU and fit the new one. Don't think you need to fart on disconnecting the battery.

   will having my transponder in lock the ecu again??
4. citroen_saxo_vtr Saxperience Forum Bum Joined: Mar 2006 Norwich Posts: 2823 Vectra sri 2.6 v6

   #4 10th February 2011, 22:17

   I need to know the same, i dont think the pick up ring does anything but the black imobilizer box has to be removed as that will lock the ecu again.
5. user_15516 Saxperience Post Whore Joined: Apr 2007 Posts: 6640 Integra DC5R & VTS

   #5 10th February 2011, 22:24

   Quote:

   Originally Posted by sam_colbear will having my transponder in lock the ecu again??

   I'm 99% sure once it's unlocked, that's it. Should work on any 3 plug VTS no problem.
6. sam_colbear Regular Poster Joined: Aug 2009 Posts: 456

   #6 10th February 2011, 22:44

   Ok I think I mite remove the transponder just incase. But you recon I can leave the battery on
7. jambo18 Regular Poster Joined: Jan 2010 fife Posts: 429 gold mk2 vtr

   #7 11th February 2011, 17:57

   You can leave the battery connected but am not sure if you have to remove your immobiliser first before fitting the unlocked ecu? Am waiting on a new ecu for my vtr and unsure what is the correct way of replacing it with the old 1 ??
8. iSlayeR Established Member Joined: Aug 2009 King's lynn Posts: 2073 Turbocharged vtr

   #8 11th February 2011, 18:02

   Remove the immobolisher box first, then it's just plug and play, not 100% sure if you have to remove it or not, but best to be safe
9. jambo18 Regular Poster Joined: Jan 2010 fife Posts: 429 gold mk2 vtr

   #9 11th February 2011, 22:02

   Cheers