Buick ECM Trivia

[JTesta1966 at aol.com]

In a message dated 7/19/00 8:28:20 AM Eastern Daylight Time, 
ludis at cruzers.com writes:

<< Similarly, the 1227153 and 1227148 ECMs (1986+) also contain the exact
 same mask ROM code.  The first is batch fire (3.0 only), the second is SFI. 
>>

But, the 153 has limited ALDL info. Is that due to the proms diagnostic bits 
being limited? If this were the case, if the ROM is the same, throwing a 
148's prom in the 153 should yield the data stream of a 148? Am I 
misunderstanding? Would you please explain?

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Jim  (FA) Testa                                             TType86 on 
#BuickGN
ASE Master Technician                                buick.fiendish.net:6667
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jtesta1966 at aol.com                           NJ Lic Emission Repair Tech
http://members.aol.com/jtesta1966/buick.htm
Associate Sponsor, Buicks at Bristol (RCA/JTP)
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