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348 Diagnostics

Discussion in '348/355' started by u000533, Jan 24, 2016.

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  1. u000533

    u000533 Rookie

    Dec 24, 2015
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    #1 u000533, Jan 24, 2016
    Last edited by a moderator: Sep 7, 2017
    Hi, sadly I don't own a Ferrari, but recently helped my brother in Canada with some diagnostic issues with his 348 TB and thought the info might be of use to others.

    His 348 developed a misfire and his local Ferrari garage couldn't work out what was wrong. I did some research and discovered the ecu diagnostic button that his car should have, not sure what the garage were doing but it went on for weeks with them achieving nothing.

    Then in an email he said his 348 didn't have the diagnostic button, a quick bit of googling reveal the wiring loom is no longer available but the button is. I bought one from here - Ferrari 348 (2.7 Motronic) - Air Injection - Ignition: Page 007 | Order Online Eurospares

    a bit more googling and I found a picture of the unavailable loom attached. As I've worked on lots of bikes I recognized the connector as a 3 way superseal like the one here 3*Way AMP 1.5 Series Superseal Wiring Connector*Kit With Boots (Wire Size Options)

    Dash bulbs were missing but they're just standard ones - t5 wedge bulbs as far as I could tell.

    So I bought the ferrari button for £5 and made the loom using 2 90 degree spade connectors, some loom covering, 2 bits of shrink tube and one 3 way superseal connector as shown in the attached jpeg, wire colours don't matter, in fact they should really be the same as its the same circuit. You could use any momentary button switch, but it wouldn't fit into the bodywork. Another option would be to use any switch on a longer loom, so that you could activate it from the driver's seat whilst doing diagnostics.

    The larger photo also shows which two connectors need to be wired.

    All this does is make a momentary connection to tell the ecu to go into diagnostic mode and flash the dash lights.

    Sent it to Canada and within a few mins of fitting they diagnosed a broken crank sensor wire.

    Hope this helps someone in the future.

    regards

    Mike.
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  2. mseals

    mseals Two Time F1 World Champ
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    #2 mseals, Jan 24, 2016
    Well done!

    Mike
     
  3. Wade

    Wade Three Time F1 World Champ
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    #3 Wade, Jan 24, 2016
    And awesome first post. Welcome to FerrariChat.
     
  4. cf355

    cf355 F1 Rookie

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    #4 cf355, Jan 24, 2016
    +1
     
  5. ernie

    ernie Two Time F1 World Champ
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    #5 ernie, Jan 24, 2016
    Excellent first post.

    Thanks for sharing.
     
  6. Wade

    Wade Three Time F1 World Champ
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    #6 Wade, Dec 26, 2016
    Last edited by a moderator: Sep 7, 2017
    Funny how things turn out... I recently bought a Canadian spec 348 tb and will use this thread to install the diagnostics buttons.

    Ready for plug and play... sourcing the parts now.
    .
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  7. Wade

    Wade Three Time F1 World Champ
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    #7 Wade, Dec 30, 2016
    Last edited by a moderator: Sep 7, 2017
    Ordered two buttons from Daniel at Ricambi and the AMP connectors from 3 Way Components Ltd (via eBay). However, the connector on my ECU has three wires, so off to the schematics I go...
    .
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  8. Wade

    Wade Three Time F1 World Champ
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    #8 Wade, Jan 11, 2017
    Last edited by a moderator: Sep 7, 2017
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  9. Wade

    Wade Three Time F1 World Champ
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    #9 Wade, Jan 11, 2017
    Last edited by a moderator: Sep 7, 2017
  10. ///Mike

    ///Mike F1 Veteran

    Dec 11, 2003
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    #10 ///Mike, Jan 13, 2017
    For the archives, the switch in my late '91 US spec car is across the gray/red and black wires in the ECU connector. I've used it to access codes so I know it does work. Hopefully it will work for Wade as well.

    Looks like the wiring diagram is incorrect in this case.
     
  11. SoCal1

    SoCal1 F1 Veteran
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    #11 SoCal1, Jan 13, 2017
    After you get to know the car it's faster just to find whats wrong. A vom can be faster then obd1
     
  12. ///Mike

    ///Mike F1 Veteran

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    #12 ///Mike, Jan 13, 2017
    Some of us are lazier than you, Tim. ;)

    OBD1 often doesn't identify the problem in its entirety like the newfangled cars do, but it's nice to get pointed in the right direction (most of the time).

    Besides, we OCD types like everything to function correctly on our cars. :)
     
  13. SoCal1

    SoCal1 F1 Veteran
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    #13 SoCal1, Jan 13, 2017


    I am beyond lazy LOL

    My OCD has me gutting everything and making it my way


    I bought a new car once only to disassemble it repaint and change interior materials. Thats really bad but I'm feeling much better now :)
     
  14. Wade

    Wade Three Time F1 World Champ
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    #14 Wade, Jan 13, 2017
    +1

    But on the flipside, I wanted to do the same with a Solstice GXP Coupe. ;)
     
  15. ///Mike

    ///Mike F1 Veteran

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    #15 ///Mike, Jan 13, 2017
    Ha! You may be OCD, but you ain't lazy. Lazy is deciding you like the car but wish it was a different color combo, so you buy another example of the same model in the right colors but don't sell the first example because it's too much trouble. ;)
     
  16. Koenig1

    Koenig1 Formula Junior

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    #16 Koenig1, Jan 13, 2017
    +1... My 91TS (Euro) uses the same colors as Mike posted....
     
  17. SoCal1

    SoCal1 F1 Veteran
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    #17 SoCal1, Jan 13, 2017
    Yeah I'm lazy it was all the coke that used to get me flying :)
     
  18. Wade

    Wade Three Time F1 World Champ
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    #18 Wade, Jan 13, 2017
    Last edited by a moderator: Sep 7, 2017
    Looking at the arrangement of the wires used in relationship to the connectors (think locking feature side down), yours conforms to the OP's and the OEM harness.

    So yes, the WSM is incorrect because the grey/red and black wires are used. Not grey/red and grey/brown.
    .
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  19. ga68

    ga68 Karting

    May 22, 2014
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    #19 ga68, Jan 20, 2017
    Hello,
    Wishing to do the diag on my EU Vehicle with the help of this post,
    I realize that I have a version of the repair guide with only the schematics of the motronic 2.5 catalysed or not and a legend stopping at number 212.
    Would you among you a nice Ferrarist to give me the opportunity to download it (MP)
    Salutations de France.
     
  20. m.stojanovic

    m.stojanovic F1 Rookie
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    #20 m.stojanovic, Jan 20, 2017
    Last edited by a moderator: Sep 7, 2017
  21. ga68

    ga68 Karting

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    #21 ga68, Jan 20, 2017
    Merci beaucoup,

    Thank you very much,
    I download in my folder :)
    Are there any other changes in the repair manual?
    If so, would it be possible to recover it?
    Thanks again for all the information that helps us to maintain our 348 no matter which country we are in.
     
  22. m.stojanovic

    m.stojanovic F1 Rookie
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    #22 m.stojanovic, Jan 20, 2017
    See the thread on "348 ABS ecu power". I have posted there the instrument cluster diagrams that are not in the usual WSM.
     
  23. Wade

    Wade Three Time F1 World Champ
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    #23 Wade, Jan 20, 2017
  24. ga68

    ga68 Karting

    May 22, 2014
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    #24 ga68, Jan 21, 2017
    Merci les amis
     
  25. seabass23

    seabass23 Karting

    Nov 6, 2016
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    #25 seabass23, Feb 25, 2017
    I'm working to equip my Canadian-spec car with this button.

    Is there any magic with the button itself? Is it a simple momentary pushbutton that connects the two pins when depressed (0 resistance)? (I don't want to try something from the junk drawer if this button is more sophisticated than I'm assuming.)
     
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