resetting ecu

1. Blxck Regular Poster Joined: Sep 2009 Middlesbrough Posts: 296 MKV Golf GTi

   #1 12th January 2010, 16:21

   hello there is there any way to reset the ecu without having it plugged into a diagnostic machine? ive heard unplugging your battery overnight may also reset it?
   Thanksn
2. user_38198 Established Member Joined: Oct 2009 West Mids Posts: 1847 Peugeot 106 1.1

   #2 12th January 2010, 16:27

   Unplug the battery for an hour. Then you should go out and work through the revs concentrating on 2000 to 4000rpm so the ECU will "learn" the best settings for the car... I think lol
3. Mochachino Saxperience Hardcore! Joined: Nov 2007 Guantanamo Bay Posts: 28700 oyster card

   #3 12th January 2010, 16:28

   Unplug the battery over night and the ECU will clear the error log.
4. Blxck Regular Poster Joined: Sep 2009 Middlesbrough Posts: 296 MKV Golf GTi

   #4 12th January 2010, 16:32

   nice 1, ive just got a new lambda sensor as 1 of the wires on it was snapped with the chunks of ice on the road, put it in and the lights still on but ive been told by gmc that it needs the codes clearing
5. Harv Saxperience Forum Bum Joined: Mar 2007 Mold Posts: 2936 EP3 Civic Type R

   #5 12th January 2010, 16:36

   It doesn't always. I could leave mine off for over a week and nothing would happen. In the end I just bought a diagnostics cable so I could link my laptop up to my ecu. Was fine then...
6. Blxck Regular Poster Joined: Sep 2009 Middlesbrough Posts: 296 MKV Golf GTi

   #6 12th January 2010, 16:53

   how did you link it up? did u have to use a program on the laptop?
7. Harv Saxperience Forum Bum Joined: Mar 2007 Mold Posts: 2936 EP3 Civic Type R

   #7 12th January 2010, 17:05

   Quote:

   Originally Posted by Blxck how did you link it up? did u have to use a program on the laptop?

   Yeah I got it with the cable, there are many programs out there though. Really easy to use, plus you can use it for proper diagnostics, like checking sensor values, air to fuel mix etc.
8. Blxck Regular Poster Joined: Sep 2009 Middlesbrough Posts: 296 MKV Golf GTi

   #8 12th January 2010, 17:10

   where can a get one and how much we looking at
9. Harv Saxperience Forum Bum Joined: Mar 2007 Mold Posts: 2936 EP3 Civic Type R

   #9 12th January 2010, 18:27

   I've got this one: http://cgi.ebay.co.uk/Elm327-Elm-327...item33591703ee
   
   But I only paid around £20 delivered for it. Its an ELM one and came with software although there are quite a few out there. Worth while investment though...

   1 user thanked this post: Mochachino
10. Mochachino Saxperience Hardcore! Joined: Nov 2007 Guantanamo Bay Posts: 28700 oyster card

    #10 12th January 2010, 18:30

    Quote:

    Originally Posted by Harv I've got this one: http://cgi.ebay.co.uk/Elm327-Elm-327...item33591703ee But I only paid around £20 delivered for it. Its an ELM one and came with software although there are quite a few out there. Worth while investment though...

    Niceone for that, will be purchasing one.
11. Blxck Regular Poster Joined: Sep 2009 Middlesbrough Posts: 296 MKV Golf GTi

    #11 12th January 2010, 18:59

    can you reset lights for abs airbag etc
12. Harv Saxperience Forum Bum Joined: Mar 2007 Mold Posts: 2936 EP3 Civic Type R

    #12 12th January 2010, 19:35

    yeah you can clear all lights on the dash board, but that doesn't mean that when you turn them off they won't come back on again. Say for example you havn't got an airbag connected the light will still come on when you reset it.
    
    But say the Engine Management Light is on, you fix the problem. Reset the codes on the ECU with said cable and software it will then go off. It is good though if you know how to use it properly and you know what sensor readings should be.
13. yeahbuddy Established Member Joined: Dec 2009 greendale Posts: 1476

    #13 30th March 2010, 17:04

    can you use it to reset the abs light codes?
14. akuakabucy Frequent Poster Joined: Feb 2010 Liverpool Posts: 596 Mk5 Golf GTTDI, Vauxhall Vivaro

    #14 30th March 2010, 17:08

    I have just replaced my lamda sensor after having a decat fitted I bought a cat and one catalytic fault code was still showing up. After driving around for a week the fault was still logged and wouldnt delete so bought a new lambda, now the lights gone out and fault cleared but it took around 4 days to go out. Apparantly it has to have so many cycles of warming up and cooling down(fully) before it goes out. So I wouldnt go splashing the cash as of yet, be patient, it will go out.