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Car ECU Chip identification, and find pinout

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    Car ECU Chip identification, and find pinout

    Hi There,

    I'd like to read/write the contents of the chip. This is a 1995 vintage FORD ECU and IMMO controller.


    Unfortunately, I can't find a circuit diagram or pinout on the chips.
    The serial number uniqe, not factory?
    Can you help me identify the chips or pins?

    many thanks!
    hi, Stavi

    #2
    Re: Car ECU Chip identification, and find pinout

    top chip (28pin) has a crystal connected to pins 5 & 6 so it's a microcontroller.
    not sure what microcontroller texas instruments made in 1995

    the lower 32pin chip *may* be an eprom or flash,
    if you had the equipment you could lift it and try to read the electronic ID - but i suspect if you could then you would already have tried.

    Comment


      #3
      Re: Car ECU Chip identification, and find pinout

      Dear STJ,

      Thanks for the reply.
      Yes the goal would be to read the bottom eprom.
      I haven't lifted the chip yet. I'm afraid I would be hurt or I couldn't put it back properly. Its functionality would be important.
      And I have a hot air gun solder. But I haven't used it yet to change chips.
      This is new information for me: that the bottom of the chip can be an identifier?

      Hi, Stavi

      Comment


        #4
        Re: Car ECU Chip identification, and find pinout

        the numbers are useless,
        car ecu's always have custom numbers on everything.

        Comment


          #5
          Re: Car ECU Chip identification, and find pinout

          I'm sad to hear.
          I leave the topic open to see if anyone who has already encountered this chip live is coming for it.
          It was fitted to many Ford in the ’90s: Escort, Mondeo, Scorpio,

          Comment


            #6
            Re: Car ECU Chip identification, and find pinout

            Originally posted by stavi View Post
            Hi There,

            I'd like to read/write the contents of the chip. This is a 1995 vintage FORD ECU and IMMO controller.


            Unfortunately, I can't find a circuit diagram or pinout on the chips.
            The serial number uniqe, not factory?
            Can you help me identify the chips or pins?

            many thanks!
            hi, Stavi
            You will not be able to find any information about this type of device because it is controlled by the manufacturer and they will not release this information to you

            I have tried in the past with industrial equipment and was told because it was specially designed for the vendor that they could not release any information about the specifications of that part number but would answer questions about product that were not made for any other vendors which I was able to find a comparable part number that would probably work
            9 PC LCD Monitor
            6 LCD Flat Screen TV
            30 Desk Top Switching Power Supply
            10 Battery Charger Switching Power Supply for Power Tool
            6 18v Lithium Battery Power Boards for Tool Battery Packs
            1 XBox 360 Switching Power Supply and M Board
            25 Servo Drives 220/460 3 Phase
            6 De-soldering Station Switching Power Supply 1 Power Supply
            1 Dell Mother Board
            15 Computer Power Supply
            1 HP Printer Supply & Control Board * lighting finished it *


            These two repairs where found with a ESR meter...> Temp at 50*F then at 90*F the ESR reading more than 10%

            1 Over Head Crane Current Sensing Board ( VFD Failure Five Years Later )
            2 Hem Saw Computer Stack Board

            All of these had CAPs POOF
            All of the mosfet that are taken out by bad caps

            Comment


              #7
              Re: Car ECU Chip identification, and find pinout

              the N81c66 microcontroller is a standard part,
              the datasheet will have pinouts and you can trace them to the suspected memory chip

              Comment


                #8
                Re: Car ECU Chip identification, and find pinout

                Wx79ahn0w = tms370(immo info).
                N70011fwchca = eprom - (mapping data)

                Comment


                  #9
                  Re: Car ECU Chip identification, and find pinout

                  Originally posted by stj View Post
                  the N81c66 microcontroller is a standard part,
                  the datasheet will have pinouts and you can trace them to the suspected memory chip
                  That seems like a good idea. I'll try.
                  Thank you very much

                  Comment


                    #10
                    Re: Car ECU Chip identification, and find pinout

                    Originally posted by jumpstart View Post
                    Wx79ahn0w = tms370(immo info).
                    N70011fwchca = eprom - (mapping data)
                    Dear Jumpstart,

                    Thank you very much for your help. This seems like a good solution. I see the RT801f + PEB-1 eprom reader does not know this type of chip, I need to get another type of eprom reader.

                    Comment

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