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Fiat Grande Punto 2011 - Repair of the engine controller, no signal for the 4th

jacusix 12675 12
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Treść została przetłumaczona polish » english Zobacz oryginalną wersję tematu
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  • #1 16527225
    jacusix
    Level 16  
    Good day.
    Due to the fact that this is supposedly a fairly common problem, I decided to ask. Maybe someone will help :) Controller with the designation IAW 5SF9.A2 (IAW 5SF3.M1 donor bought)

    2011 Fiat Grande Punto car 1.4 + LPG. The engine controller does not give a signal to the coil going to the 4th candle (first from the right). When viewing the driver:
    Fiat Grande Punto 2011 - Repair of the engine controller, no signal for the 4th Fiat Grande Punto 2011 - Repair of the engine controller, no signal for the 4th Fiat Grande Punto 2011 - Repair of the engine controller, no signal for the 4th

    you can see 4 voltage regulators next to each other with the designation st mar vb525sp. As I guess, each voltage regulator has a separate coil. And that's what I am able to deduce for this time. Someone who is sitting on the topic certainly knows where to look for the fault. If anyone could help, I would be very grateful.

    greetings
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  • Helpful post
    #2 16527282
    sk700
    Level 31  
    Hello
    You're going in the right direction.
    These are not voltage regulators but coil drivers.
    I haven't done it in the super dot yet, but in pandas they fall regularly.
    You need to determine which driver is responsible for this particular coil. Or, after the diagram, you will find out which pin of the connector is connected, or on the unplugged battery, connect the computer to the car and check with an ohmmeter to which driver is the transition from the wire controlling this particular coil.
    How do you determine which is the best solution?
    EDIT
    The coil output is the large plates under these elements.
  • #3 16527636
    jacusix
    Level 16  
    It is actually as you described :) I found pin 1 (described in the socket) from the coil 4 of the candle and it connects to the bottom of the extreme chip. Now I just need to get another driver, solder the chip and let you know the result :)
    Fiat Grande Punto 2011 - Repair of the engine controller, no signal for the 4th
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  • #4 16527923
    sk700
    Level 31  
    If you already have the driver disassembled, take accurate photos and rewrite the numbers from the sticker (because the search engine does not index the captions in the photos) - it may be useful to a person who burns an element and will look for its value :)
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  • #5 16533492
    jacusix
    Level 16  
    I bought a second driver ... with an ignition switch and something else ... Otherwise they did not want to sell it to me because it is a set and they only sell it like that. But due to the fact that I paid PLN 120 for the set and it costs 200 + shipping on all-trade, it was not bad anyway ... The drivers included the designation vb325sp. Also the driver now works and I know that the systems with these markings can be interchanged. So they sold me damaged cables in the store, which they later replaced with another. One of the spark plugs purchased is or has been damaged, the computer is damaged, the timing is incorrectly adjusted ...
  • #6 16534101
    daras41
    Level 26  
    You can flip the layout, but it's easier to soft ;)
  • #7 16534237
    sk700
    Level 31  
    daras41 wrote:
    You can flip the layout, but it's easier to soft

    But you have to have something, a pendrive inserted into the radio will not do it, and if he had equipment, he would not ask such questions, he only replaced the driver and forgot about the topic :)
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  • #8 16534556
    jacusix
    Level 16  
    You mean soft, i.e. the immobilizer? If I could see which bone he is in and if he can be soldered like this, I would probably do it but all this is knowledge and nobody wants to share this knowledge :P
  • #9 16534837
    adam7009

    Level 41  
    It is in the ST10 bone ....
  • #10 16535820
    daras41
    Level 26  
    Look for electronics in the area and you will make a clone. With soldering, that's more of a mess than it can be ;)
  • #11 16535944
    Frost160
    Level 14  
    And how "clone" in the sense of copying?
  • #12 16536008
    sk700
    Level 31  
    Frost160 wrote:
    And how "clone" in the sense of copying?

    Yes, the programmer will transfer the content of the ST without physically replacing the system, but if the starter kit is available and costs PLN 120, it makes no sense because there is always the risk of releasing the controller when playing in programming ... this for PLN 50. Amen.
  • #13 21093518
    valentweety3
    Level 1  

    hi can anyone send me an ecu pinout on the IAW 5SF9.AG ECU I THINK THEY ALL THE SAME AND CAN I USE ANOTHER IAW 5SF FOR MY 1.4 PUNTO EVO THANX
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Topic summary

The discussion revolves around a common issue with the engine controller of a 2011 Fiat Grande Punto, specifically the lack of signal to the coil for the 4th spark plug. The user identifies the controller as IAW 5SF9.A2 and mentions using a donor controller IAW 5SF3.M1. Responses suggest that the components in question are coil drivers rather than voltage regulators. Users recommend checking the wiring and connections to determine which driver controls the faulty coil. The user successfully identifies the relevant pin and plans to replace the driver. Additional advice includes documenting component details for future reference and considering cloning the ECU if necessary. The conversation also touches on the interchangeability of driver models and the importance of proper soldering techniques.
Summary generated by the language model.
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