Resetting ECU's
  • Help
Results 1 to 2 of 2

Thread: Resetting ECU's

  1. #1
    Fellow Frogger! Mi16 Man's Avatar
    Join Date
    Jun 2001
    Canberra, ACT

    Resetting ECU's

    Apart from ensuring the negative '-' terminal comes off first, what pre-cautions should I take when disconnecting the battery. I am about to embark on replacing the vacuum solenoid that has been talked about in another discussion, 'Hot Jerky 306XSi'.

    Also, once this part is replaced that is causing the 'check engine' light to stay on for 5 seconds after startup, will it cancel the problem in the ECU's memory???

    Good Friday in the garage, can't wait!!!! Just keep them Hot X buns coming..........

    Stu G.

    "Take a Lion through a corner - FAST"

    Current Fleet;
    2010 308 XSE HDi SW [Vapour Grey]
    2010 VW GOLF GTI [Carbon Steel Grey]

    In the Family;
    2012 508 Allure HDi [Thorium Grey]
    2008 207 HDi XT [Bianca White]

    Past "Frogs"
    2008 308 XSE HDi SW / 2006 307 XSE HDi Touring / 2001 306 XSi / 2005 206 GTi180 / 2005 407 HDi / 2003 206 XT / 1993 SII 405 Mi16 / 1990 205 GTi / 2x 1985 505 GTi S1 / 1976 504 / 1982 20 TS / 1997 306 XR / 1992 205 Si

  2. #2
    Join Date
    Mar 2002
    Actually As long as you are careful removing it and insulate it properly you shouldn't have to remove the negative side. Removing the negative side first just stops the positive (live) side from arcing on the battery as you remove it or while it floating round the engine bay...that said. If you are working anywhere near the fuel or oil in the engine bay it's probably better to remove the negative as well
    disconnecting the battery will reset the EFI system completely...Make sure you follow the guidelines in the manual, know in the 306 you are supposed to reconnect the battery, turn the ignition to ON for 10 seconds then turn the car over. It'll idle like a bitch for 5 minutes or something like that. Good idea at this stage is to take the car for a thrash cause EFI behaviour (economy, power, or just poor running) is learnt by the ECU early, It's a good way to make sure the EFI is taking advantage of the 98RON fuel you are giving it HINT HINT
    Anyway that's my say on it good luck trying to slide your fingers into the engine bay. May your swearing and cursing not be too bad
    ...The True Lion

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts