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355 No start no check engine or slow down light

Discussion in '348/355' started by Jelly Spanners, Jan 7, 2014.

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  1. Jelly Spanners

    Jelly Spanners Karting

    Jul 19, 2009
    77
    South West UK
    Full Name:
    Jeremy
    #1 Jelly Spanners, Jan 7, 2014
    Hi My 1997 UK F355 GTS wont start Motronic 5.2

    Battery went flat over holidays and after full recharge car fails to fire.

    Battery fully charged and cranking as normal
    Alarm dissarmes light solid and not flashing
    Engine check & Slow Down light NOT comming on with ignition
    Battery voltage at engine ECU Fuse 30 and swapped relay M
    Air pump starts when ignition turned on? (now disconected)

    Everything works on vehicle as it should except lights from engine ecu?

    Am I missing a simple ECU reset? car did it last summer and corrected its self and has been ok since. Battery isolator off over night tonight will try again tomorrow

    Appreciate advice before I start stabbing in the dark.

    Many thanks in advance...
     
  2. plugzit

    plugzit F1 Veteran
    Silver Subscribed

    Dec 1, 2004
    7,777
    Redondo Beach, CA
    Full Name:
    Bruce Bogart
    #2 plugzit, Jan 7, 2014
    got spark?
    got fuel pressure?
     
  3. Jelly Spanners

    Jelly Spanners Karting

    Jul 19, 2009
    77
    South West UK
    Full Name:
    Jeremy
    #3 Jelly Spanners, Jan 7, 2014
    No? because engine ECU appears dead?

    Even before cranking?
     
  4. plugzit

    plugzit F1 Veteran
    Silver Subscribed

    Dec 1, 2004
    7,777
    Redondo Beach, CA
    Full Name:
    Bruce Bogart
    #4 plugzit, Jan 7, 2014
    check spark while cranking. is it there?
    check fuel pressure after key on. is it there?
    That is the first step in diagnosis. Until you do that, there is no direction as to how to proceed.
     
  5. Jelly Spanners

    Jelly Spanners Karting

    Jul 19, 2009
    77
    South West UK
    Full Name:
    Jeremy
    #5 Jelly Spanners, Jan 7, 2014
    The engine ECU, is dead...

    No engine management lights on dash with ignition turned on
     
  6. roadracer311

    roadracer311 Formula 3

    May 6, 2009
    2,398
    San Francisco
    Full Name:
    Paul
    #6 roadracer311, Jan 9, 2014
    Was the car jump-started in the process of trying to get it going? I've heard sometimes jump-starting takes out ECU's.
     
  7. Jelly Spanners

    Jelly Spanners Karting

    Jul 19, 2009
    77
    South West UK
    Full Name:
    Jeremy
    #7 Jelly Spanners, Jan 9, 2014
    update; car now repaired and running

    Corroded electrical connection on fuel injection relay terminal. Found while doing pin out and jumper tests, although relay clicking it wasn't supplying voltage to ECU

    Cleaned fuesbox with electrical contact cleaner & water dispersant

    NB if air pump starts with ignition turned on before engine being cranked, it may signal no power being supplied to injection ECU?

    Many thanks to all on forum for help and advice
     
  8. taz355

    taz355 F1 Veteran
    Owner Silver Subscribed

    Feb 18, 2008
    6,016
    Indio Ca/ Alberta
    Full Name:
    Grant
    #8 taz355, Jan 11, 2014
    Thanks for sharing
     

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