[Diy_efi] 16191947 ECM

[Charles M Slack, III]

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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