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<DIV><FONT size=2>Jason,</FONT></DIV>
<DIV><FONT size=2>Check ground to PCM on pin "A"--check 5 volt supply on pin
"B". If you have neither, or either--check the </FONT></DIV>
<DIV><FONT size=2>wiring to the PCM. If the CE light is burnt--it's part of the
circuit, and you'll need to fix that. If you have</FONT></DIV>
<DIV><FONT size=2>no CE light, (could be driver circuit)--I don't have the
schematics in front of me. I just had one in the shop with</FONT></DIV>
<DIV><FONT size=2>correct voltages, just couldn't get a flashed CE light or any
PCM communication--was a bad computer.</FONT></DIV>
<DIV><FONT size=2>Lyndon.</FONT></DIV>
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style="BORDER-LEFT: #000000 2px solid; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px; PADDING-LEFT: 5px">
<DIV><FONT face=Arial size=2><B>-----Original Message-----</B><BR><B>From:
</B>Jason R. Haines <<A
href="mailto:jhaines@lingenfelter.com">jhaines@lingenfelter.com</A>><BR><B>To:
</B>GMECM <<A
href="mailto:gmecm@diy-efi.org">gmecm@diy-efi.org</A>><BR><B>Date:
</B>September 2, 2000 1:08 PM<BR><B>Subject: </B>ALDL
data<BR><BR></DIV></FONT>
<DIV><FONT face=Arial size=2>What is an easy way to check to see if an ALDL
port has any data coming from it at all (if it is wired correctly etc.)? I
have a custom car I want to read the data from but a Tech 1 and a Tech 2 won't
communicate (neither will Diacom). Anything I can check with a voltmeter? What
about using the Diacom cable (parallel port) and some kind of software to see
the raw data (if any exists)? I think I might also have a serial port ALDL
cable (for some other software) that I could use.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>BTW - the engine is a Cadillac Northstar engine
with a 1994 ECM (I think it is ECM part number 16197429) and a custom harness
(no Cadillac dash, no electronic throttle etc.).</FONT></DIV>
<DIV><FONT face=Arial size=2><BR>Jason</FONT></DIV>
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