[Diy_efi] 16191947 ECM

[don.broadus at exeloncorp.com]

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. 






-----Original Message-----
From: diy_efi-bounces at diy-efi.org [mailto:diy_efi-bounces at diy-efi.org]On
Behalf Of Torbj?rn Forsman
Sent: Tuesday, March 21, 2006 4:25 PM
To: diy_efi at diy-efi.org
Subject: Re: [Diy_efi] 16191947 ECM


There are many vehicles from mid 90's that have the standardized OBD II 
connector (SAE J1962) but that nevertheless do not conform to any of the 
OBD II protocols. For example, many VW and Audi have a hardware OBD 
interface that conforms to ISO 9141 but the communication protocol is a 
proprietary one (usually called VAG-COM). When Volvo began fitting OBD 
II connectors to their vehicles around 1996, they didn't even try to 
make any electrical conformance to OBD II.   The only diagnostic method 
is like older Volvo vehicles, one has to connect a LED and a switch to 
some pins of the connector and count LED flashes.

Best regards

Torbj?rn Forsman

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.
> 
> GAS
> 
> ----- Original Message ----- 
> From: <don.broadus at exeloncorp.com>
> To: <diy_efi at diy-efi.org>
> Sent: Monday, March 20, 2006 3:01 PM
> Subject: RE: [Diy_efi] 16191947 ECM
> 
> 
> Thanks for the info, My friends 94 LT1 Vette has the early OBII so I was 
> just wondering. 
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