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Thread: 1989 - 1227303 ECU ALWB, AHXN, bad defintion file?

  1. #1
    Carb and Points!
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    1989 - 1227303 ECU ALWB, AHXN, bad defintion file?

    Hello,
    I have an ECU definition file $53, but this file is for bin image used only in Canadian and US market. $53 is for an ALWB bin file.

    I have AHXN bin file for the same car offered in Europe market. Those car has the same: sensors (MAT, TPS, coolant temperature, oxygen sensor, inductive camshaft rotation sensor), IAC, EGR, ECU, engine (C16NZ) and automatic transmission. Those cars use classic Multec - GM TBI 700.

    $53 ECU definition file is not compatible with AHXN.
    Can you help me find correct ignition maps and correct wrong addresses in definition file for AHXN?


    P.S.
    ALWB and AHXN is for automatic transmission.
    English isn't my first language, so please excuse any mistakes.
    Attached Files Attached Files

  2. #2
    Fuel Injected!
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    The AXHN that you posted has a mask of $11 at 0008, checksum is at 0006,7 and check my other post regarding this but if this an unaltered read, the checksums add up correctly for both of these files. You will not be able to use a $53 mask software with an $11 mask as things are moved around a bit I assume. I have no experience with either mask id, I just know how GM usually does things and am trying to help. What is the ecm part number? Just as a check, I am assuming you have a 28 pin eprom memcal? Can you take pics of what you have and post?

    edit, just as another note, the same ecu can use many different "chips". Knowing which hardware you have will help. I always try to start with the latest calibrations for an ecu when pinouts are the same. Example would be '86,7,8 tpi, I go straight to the '89 mask($6E) and tune from there since it has the same ecu.
    Last edited by In-Tech; 10-16-2018 at 01:01 PM.

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