Serial data hardware solution

[CSH-HQ]

To read the ALDL you have to connetect to the ECM's Serial data line,
that is what you tie the Tx/Rx leads from the Max 232/233 to.
If someone has the Gcar wiring, or if on the FTP, might make better sense
Grumpy
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>CSH-HQ wrote:
>> 
>> No, what I said is what I recall.
>> What good is grounding the tx rx lines?..
>> Never mind, also the above was about the Max 232/233 chip interface
>> Grumpy
>> 
>> >>I do beleive i've seen all 3 twisted together.
>> >>Tx/Rx/serial
>> >That should read Tx/Rx/Gnd...
>> >
>Bruce, if what you said is right then I'm not understanding what you
>mean by serial.  Tx and Rx are usually the serial lines with a reference
>to a gnd.  If they are tied together with something then what is it? I
>typically tie Tx and Rx together and use that line with ground for
>communications.  If your saying tie these with something else then I
>don't know what it is unless you are referencing the driver enables?
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