[Diy_efi] 16191947 ECM

[Tom Visel]

Dunno about affordable - that's an eye-of-the-beholder kind of thing.  
The original Snap-on Red Brick (MT-2500, not the graphing color version) 
can be had for $450 or so on eBay now and again and the 1997 Domestic 
Primary cartridge will read these vehicles with no problem.  The 
Vetronix Mastertech we had at a shop I worked at back when these were 
new (96-97) would not do the job, but they probably have newer software 
available that covers this issue.  Maybe some careful shopping could net 
you a brick that does tricks.
TomV

Charles M Slack, III wrote:

> All, that's what I figured out on my son's 95 Blazer and 95 Buick.
> Unfortunately I haven't found an affordable scanner to do it.
> I have two very good scanner set ups for GM OBDII, FORD,
> Chrysler, and most foreign that I care about. Any ideas on
> a scanner that will read the Orphan OBD I with OBD II connector.
> Tried the ones at Autozone, with very little luck. They must need a
> connector cable adapter to get the right pins connected.
> Any ideas? or experiences that work?
> Charlie Slack
> Austin, TX
>
> don.broadus at exeloncorp.com wrote:
>
>> Your analysis is right on the money.
>>
>>
>>
>>
>>
>> -----Original Message-----
>> From: diy_efi-bounces at diy-efi.org [mailto:diy_efi-bounces at diy-efi.org]On
>> Behalf Of Tom Visel
>> Sent: Wednesday, March 22, 2006 1:48 PM
>> To: diy_efi at diy-efi.org
>> Subject: Re: [Diy_efi] 16191947 ECM
>>
>>
>> There is no "request" line you can ground at the ALDL to tell the 
>> computer that you want it to blink the codes on the check engine 
>> lamp.  You must use a scan tool.  It's strange because it's 
>> "adolescent" - not quite the capability of the OBD-II stuff, but not 
>> as simple as the older stuff.
>>
>> It's not you.  It's the engineers and bean counters at GM.  They get 
>> kickbacks from the Hair Club for Men, so they developed a strategy to 
>> make us scratch our heads more often.
>> TomV
>>
>> Gary wrote:
>>
>>  
>>
>>> Maybe it is me, but I don't understand
>>>
>>>   
>>>
>>>> This is one strange ECM for 1994.
>>>>     
>>>
>>> The the '94 and up LT1 equipped GM 'F', 'Y', and 'B' body vehicle
>>> (P)CMs could not have SES codes read by connecting any terminals
>>> within the ALDL connector.
>>>
>>> GAS
>>>
>>> ----- Original Message ----- From: <don.broadus at exeloncorp.com>
>>> To: <diy_efi at diy-efi.org>
>>> Sent: Tuesday, March 21, 2006 5:26 PM
>>> Subject: RE: [Diy_efi] 16191947 ECM
>>>
>>>
>>> Thanks for your reply. This is one strange ECM for 1994. Without the 
>>> "B" term in the ALDL you can't short "A" and "B" together to get the 
>>> SES lamp to flash the codes. Looks like scan tool only.
>>>
>>>
>>> don.broadus at exeloncorp.com wrote:
>>>
>>>   
>>>
>>>> My friend ordered a Hypertech programmer for the Vette and the
>>>> Tech support guy told him it was OBII I don't have the PCM number.
>>>>
>>>>
>>>> -----Original Message-----
>>>> From: diy_efi-bounces at diy-efi.org 
>>>> [mailto:diy_efi-bounces at diy-efi.org]On
>>>> Behalf Of Gary
>>>> Sent: Monday, March 20, 2006 8:31 PM
>>>> To: diy_efi at diy-efi.org
>>>> Subject: Re: [Diy_efi] 16191947 ECM
>>>>
>>>> It is common to find '95 GM F bodies with the OBD II ALDL
>>>> connector, but they indeed have an OBD I PCM on board.
>>>> I question that vette being equipped with an OBD II PCM.
>>>> In regards to early or late notation, either it is an OBD I or II.
>>>>     
>>>
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>>>
>>>   
>>
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