[Diy_efi] PCM/ECM wish list question

[K DANIEL]

The main relay driver suplays power to all parts of of the engine  such as the injectors, ignition coil and power on to the ECM itself. The SES lamp is fault indicator lamp. The RS 232 is not a standard diagnostic protocol  all the ECM works with OBDII


----- Original Message ----
From: Steven P. Donegan <donegan at donegan.org>
To: diy_efi at diy-efi.org
Sent: Saturday, December 30, 2006 7:00:36 AM
Subject: Re: [Diy_efi] PCM/ECM wish list question


Thank you for the feedback. What do the Main relay driver and the SES
lamp driver actually do? I had not thought of OBDII at all as the system
talks via RS-232 already. I suppose to make it a complete
plug-compatable unit OBDII will be required. I have no intention of
feeding any data to the car's black box (ie the air bag controller)
other than that required for the air bags to function.

On Sat, 2006-12-30 at 06:28 -0800, K DANIEL wrote:
> Hi
> The following are missing from the output side 
> Main relay driver
> Fuel pump relay driver
> IAC drivers
> SES lamp driver
>  
> Nothing is mentioned about the on board diagnostic such as the OBDII which is very important 
> Kamal Daniel
> 
>  
> ----- Original Message ----
> From: Steven P. Donegan <donegan at donegan.org>
> To: diy_efi at diy-efi.org
> Sent: Friday, December 29, 2006 8:39:16 AM
> Subject: [Diy_efi] PCM/ECM wish list question
> 
> 
> I am designing an ECM/PCM (based on an LPC2138 ARM CPU). So far I have
> the following inputs:
> 
> Manifold Absolute Pressure
> Manifold Air Temperature
> Coolant Temperature
> Oil Temperature
> Oil Pressure
> Detonation Sensor
> Throttle Position
> Mass Air Flow (GM frequency style)
> 4(ea) O2 sensors (my vehicle has 2 pre-cat and 2 post cat sensors)
> Crank Position Sensor
> Cam Position Sensor
> 
> What if anything am I missing on the input side of things?
> 
> On the output side of things I have:
> 
> 8(ea) coil-on-plug triggers
> 8(ea) injector triggers
> 
> FYI - this will be an open source project similar to Megasquirt. All
> code will be written in C under the FreeRTOS operating system. Right now
> the hardware design looks like a primarily passive 'motherboard' with
> daughter cards for the analog inputs, the outputs, and the CPU (see
> www.olimex.com and the LPCH2138 part for the CPU description). For those
> who have 1998-2000 LS1 based Camaro's this will be intended to be a 100%
> direct replacement for the stock computer.
> 
> _______________________________________________
> Diy_efi mailing list
> Diy_efi at diy-efi.org
> Subscribe: http://lists.diy-efi.org/mailman/listinfo/diy_efi
> Main WWW page:  http://www.diy-efi.org/diy_efi
> 
> __________________________________________________
> Do You Yahoo!?
> Tired of spam?  Yahoo! Mail has the best spam protection around 
> http://mail.yahoo.com 
> _______________________________________________
> Diy_efi mailing list
> Diy_efi at diy-efi.org
> Subscribe: http://lists.diy-efi.org/mailman/listinfo/diy_efi
> Main WWW page:  http://www.diy-efi.org/diy_efi

_______________________________________________
Diy_efi mailing list
Diy_efi at diy-efi.org
Subscribe: http://lists.diy-efi.org/mailman/listinfo/diy_efi
Main WWW page:  http://www.diy-efi.org/diy_efi

__________________________________________________
Do You Yahoo!?
Tired of spam?  Yahoo! Mail has the best spam protection around 
http://mail.yahoo.com