Diacom reports 23 battery volts?

[Programmer]

Measure the voltage at the ALDL with the car running. I've seen this problem
when
two fusible links are improperly repaired...but voltage regulation could be
toast, too.
Lyndon.
-----Original Message-----
From: Jim Sloan <leroy at sunflower.com>
To: gmecm at diy-efi.org <gmecm at diy-efi.org>
Date: August 29, 2000 10:55 AM
Subject: Diacom reports 23 battery volts?


>My dad called and said his car wasn't running right and the check engine
>light was on. It is a 91 Cutlass Ciera with a 3.3L.  I hooked up Diacom and
>checked the trouble codes. The current code listed high battery voltage.
>History showed high battery voltage, tps sensor out of range and esc
>malfunction. I started the car and Diacom showed around 23 volts! Voltage
at
>the alternator was 14.5. I checked the inputs at the ecm and didn't find
>anything over 13.  I think his ecm is toast.  Anyone else had a similar
>problem?
>
>The ecm number is 16159274. Memcal AXAT9713. I can post it to incoming if
>anyone can help me identify the eprom.  I think it's a 27C256.
>
>TIA,
>
>Jim Sloan
>leroy at sunflower.com
>
>
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