Omega Owners Forum

Omega Help Area => Omega Electrical and Audio Help => Topic started by: Tolak on 31 July 2008, 15:57:01

Title: Inter-ECU communication
Post by: Tolak on 31 July 2008, 15:57:01

What is the protocol for the inter-ECU communication?
Are all signals discrete wires?  Are they active high (12V = bad) or active low (gnd = bad)? And what if the signal is O/C?  

Title: Re: Inter-ECU communication
Post by: TheBoy on 31 July 2008, 19:15:52

Quote

What is the protocol for the inter-ECU communication?
Are all signals discrete wires?  Are they active high (12V = bad) or active low (gnd = bad)? And what if the signal is O/C?  

varies on ecu and car age.  some are simple on/off, some coded, some are CAN

Title: Re: Inter-ECU communication
Post by: Tolak on 01 August 2008, 00:45:42

Fair enough.
In my case, I'm dealing at a 1995 Omega diesel 2.5 CDX with an auto 'box.
Isn't that a bit early for CAN bus?

And following from the plethora of other questions I've raised, I'm wondering if I can stop the engine ECU from knowing that the Gearbox ECU is declaring a fault, or if they are too tightly integrated to do something as simple as pulling a connector.