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Thread: Uber-easy DIY USB ALDL Cable

  1. #106
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    You still need to add the ALDL connector itself and a housing if you wish to compare the price to a purchased cable.

    Otherwise you might as well compare the price of the FT232RL chip to the cable. The chip itself btw costs about $3.50

  2. #107
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    Quote Originally Posted by phonedawgz View Post
    You still need to add the ALDL connector itself and a housing if you wish to compare the price to a purchased cable.

    Otherwise you might as well compare the price of the FT232RL chip to the cable. The chip itself btw costs about $3.50
    Cheers for the quick response guys.
    I thought the 10K ohm resistor was for 160buad ect when looking at VR,VS commys (hopefully I havent missed read there!)
    Or are there particular modules that require the 10K resistor to communicate properly/obtain chatter?

    I will be mainly using the cable for radios,clusters and BCM's since my application reads/writes to these modules for various aspects eg BCM security number, change cluster v6->V8 ect.

    As for the Connector and cable, as RobertISaar said, if you have a look around, can find the 16pin connector and cable together for under ~$8 shipped. Since im buying 8+ the price drops to ~$5 shipped. Obviously buying more costs more but Im hoping to make a few of the cables as "test" cables. Both components should rock up roughly the same time since there coming from the same place.

  3. #108
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    10K is rarely needed to start data flow on 160 Baud, on most it will put ECM in ALDL mode which really messes up data. I've never seen another module on a 160 Baud?

    I'd be intrested in your application for re-writing other modules? I'm trying to disable magnetic shock feedback in a 2001 Silverado that is getting some suspension work and it has created a CEL which is not in the PCM.

    1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
    1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
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  4. #109
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    Quote Originally Posted by EagleMark View Post
    10K is rarely needed to start data flow on 160 Baud, on most it will put ECM in ALDL mode which really messes up data. I've never seen another module on a 160 Baud?

    I'd be intrested in your application for re-writing other modules? I'm trying to disable magnetic shock feedback in a 2001 Silverado that is getting some suspension work and it has created a CEL which is not in the PCM.
    Program does have a ALDL chatter/listener which allows listening to a cars chatter over communication line, also has a "frame count" feature which counts the amount of times each frame is sent. Makes it easy as to see what happens when door unlocks/locks, aircon on, boot open ect ect.

    Will let yous know how the aldl cable turns out!
    Last edited by DownUnder; 11-10-2023 at 05:06 AM.

  5. #110
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    Exclamation

    What chance that the scheme will work with my Mitsubishi Eclipse G1 D22A FWD 92 ?

  6. #111
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    what kind of communication protocall does it use?
    1995 Chevrolet Monte Carlo LS 3100 + 4T60E


  7. #112
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    Must be ALDL...

  8. #113
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    hmm.... an ADX seems to exist and i found this in a search:

    http://www.dsmtuners.com/forums/arti...ing-cable.html

    it looks like the DSM ECMs use a real RS232 protocall, not TTL/UART like GM?
    1995 Chevrolet Monte Carlo LS 3100 + 4T60E


  9. #114
    Fuel Injected! phonedawgz's Avatar
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    It seems odd that they would use RS232 voltages and then tie them together in one wire, however that is quite similar to what GM did. It would be interesting to see if a standard FT232RL works, however if it is known that the RS232 voltages work, why chance it?

  10. #115
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    i never said it made sense.

    but that is what it looks like to me.

    before stumbling across using the FT232R as a USB to UART converter, i did use some FT232R based USB to RS232 adapters, they worked quite well at 8192 baud, but required a more complex circuit with the GM applications(used a MAX232, so coming from the PCM: UART to RS232 to USB conversion). with the mitsubishi system, i would probably go that route, since all you would need is the USB-RS232 converter, a really common diode and a 10K resistor and it's ready to go unless you wanted to integrate a DB9 port or something like it.

    there are PLENTY of cheap FT232R based USB-RS232 converters to be found pretty much anywhere.
    1995 Chevrolet Monte Carlo LS 3100 + 4T60E


  11. #116
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    There is a 100% working schemes but for RS232.My task is to find a USB to RS232 that will work.

    http://mmcdlogger.sourceforge.net/

    40732759.jpg


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  12. #117
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    USB to RS232 is pretty easy. off-hand, i can tell you that the Parallax 28030/28031 is what i was using for that very purpose. there are probably cheaper solutions as well.
    1995 Chevrolet Monte Carlo LS 3100 + 4T60E


  13. #118
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    Just ordered a FT232RL from ebay for $11.94 shipped from California.

    http://www.ebay.com/itm/FTDI-FT232RL-Type-B-USB-to-Serial-adapter-module-USB-To-RS232-for-Arduino-/181088667903?
    (This one will work.... right?)

    I was about to go with the parallax and max route but thankfully I found this thread.

  14. #119
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    the parallax/MAX232 route works perfectly..... but is overcomplex. the normal USB to UART/TTL also works perfectly, is MUCH less complex and is even cheaper too. hard to argude with that combination.

    that converter looks fine, even has all 3 pins you'll need right next to each other.
    1995 Chevrolet Monte Carlo LS 3100 + 4T60E


  15. #120
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    Where is there a cheap place to buy aldl pigtails? I cant find them anywhere.

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