ALDL on OBD-II PCM

[David Cooley]

At 03:47 AM 12/22/1999 -0600, you wrote:
>Does the PCM from a 3800 Series II Supercharged (L67) out of a 97+ Grand
>Prix also have an ALDL UART data output?
>I was considering this swap into my car, but was afraid I'd have to do a
>Class 2 to ALDL conversion with a microcontroller of some kind (WAAAAAY
>beyond my technical capabilities).  This is because the instrumentation
>in my Olds is fully digital, and uses the ALDL serial data to drive the
>tach in the instrument cluster.  It also supplies battery voltage, tach,
>coolant temp, and fuel consumption data to the Driver Info Computer.
>
>If the newer PCMs *do* have an ALDL compatible output, is it likely to
>work with my instrumentation with no problems, or will I encounter other
>issues?


It does have the Pin 9 UART out, but I'm not sure the specifics of what's 
actually in the data stream and what capabilities it has/doesn't have.

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David Cooley N5XMT Internet: N5XMT at bellsouth.net
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