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[Stev0]

Hi guys,

I've recently posted a technical query about my omega and the wiring to some of the sensors.
https://www.omegaowners.com/forum/index.php?topic=146335.0

Question #1: can the ECU pop? - as my knowledge goes, most sensors have a power wire (12v), signal wire (0-5v) and a ground/earth. If the wires got swapped around due to incompetence, will something die permanently? I'd imagine if the 5v signal wire suddenly received 12v, something on the ECU would let it's smoke out? The original ECU starts the car, but I can't get rid of the faults from the sensors with dodgy wiring.

2. In preparation for finding out my ECU is poked, I ordered another one, as close to the same label as possible. I did not, however, receive the matching coded key and RFID ring. Is it possible to remove the encoded portion of the ECU to have it work without the corresponding key? Here in South Africa its common practice to "unlock" the motronic boxes on the corsas and astras as hardware is re-purposed from car to car, but the guy i send my ECU's to cannot "unlock" the omega box as the software he uses is not compatible with the chip.

Old ECU:




New ECU:




Any advice would be greatly appreciated.

[Stev0]

Has anyone on the forum:

1. Popped an ECU?

2. Unlocked an ECU?

[Nick W]

Has anyone on the forum:

1. Popped an ECU?

2. Unlocked an ECU?

my friend's MGB  project has an Omega engine using a standard Motronic ECU with a bypassed immobiliser. This was done because somebody had lost the pickup ring.


Well, it did, as he's since sourced a complete ECU/chip/ring set and installed it all.

[Stev0]

Any idea how the immobilizer was bypassed?

[Doctor Gollum]

If you haven't one already, I would suggest a Haynes manual, readily available via ebay.

This contains full wiring diagrams for the early Omegas

[Nick W]

Any idea how the immobilizer was bypassed?

by doing some electronic stuff.


You have bigger problems than worrying about the immobiliser; the butchered wiring is probably the cause of all your problems.

[Stev0]

Any idea how the immobilizer was bypassed?

by doing some electronic stuff.


You have bigger problems than worrying about the immobiliser; the butchered wiring is probably the cause of all your problems.

My fear is that the butchered wiring let the smoke out, but lets see ons the connectors are swapped