douglas_geb
New member
- Joined
- Feb 7, 2006
- Messages
- 3
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I've stumbled across this forum while looking for a solution for my problem, maybe you can help me...
I have a Fiat Brava 1.2 16V '99 with an immobilizer system with a master key and code card.
I bought the car 2nd hand, and I received from the previous owner only the red key and 2 blue keys, but no code card.
Some weeks ago my car immobilizer suddenly stopped recognizing the key, and the car refused to start anymore.
The fault appeared out of nowhere: I drove the car 3-4 hours, then stopped for 10 mins, and when I wanted to continue, it didn't recognize the key.
I assumed it was some simple contact problem but it didn't go away.
After trying 100 times I called road assistance and they took the car in some garrage to check it.
The guys said they found and solved some cable problem, but apparently messed up something more because they started asking me for the immobilizer code card.
I don't have the code card, and neither the previous owner, so I had to bring the car to a local Fiat garage.
This turned out not to be the best move:
They didn't even read out the error codes from the ECU or immobilizer, neither they tested the modules one by one to find out where does the sequence
The only solution they proposed was to replace the ECU with a brand new factory one without a code, take out the immobilizer and continue to use it like that.
To me this sounds quite a waste of spare parts and money (the ECU costs almost 20% of the car! value) , because as far as I understand, the ECU and the immobilizer are working OK, but they mismatch with the code, or one of them lost the code, or it's something with the antenna...
The parts are the following:
ECU - Bosch 0261206276
Immo box - Magneti Marelli IMM110.01
Does anyone have a signalling diagram of the code recognition sequence that the key, the immo box and the ECU exchange during startup?
How about electronic schematics of the ECU and immobilizer?
I'm trying to understand how the whole sequence works and to see if I can test some parts myself.
One more question:
The ECU and the immo box are both out of the car.
What happens with the coding, is it still there, or does it get reset?
I would appreciate any details or links, I searched across the whole Internet, but found almost nothing...
Thanks a lot for the help!
Douglas
I have a Fiat Brava 1.2 16V '99 with an immobilizer system with a master key and code card.
I bought the car 2nd hand, and I received from the previous owner only the red key and 2 blue keys, but no code card.
Some weeks ago my car immobilizer suddenly stopped recognizing the key, and the car refused to start anymore.
The fault appeared out of nowhere: I drove the car 3-4 hours, then stopped for 10 mins, and when I wanted to continue, it didn't recognize the key.
I assumed it was some simple contact problem but it didn't go away.
After trying 100 times I called road assistance and they took the car in some garrage to check it.
The guys said they found and solved some cable problem, but apparently messed up something more because they started asking me for the immobilizer code card.
I don't have the code card, and neither the previous owner, so I had to bring the car to a local Fiat garage.
This turned out not to be the best move:
They didn't even read out the error codes from the ECU or immobilizer, neither they tested the modules one by one to find out where does the sequence
The only solution they proposed was to replace the ECU with a brand new factory one without a code, take out the immobilizer and continue to use it like that.
To me this sounds quite a waste of spare parts and money (the ECU costs almost 20% of the car! value) , because as far as I understand, the ECU and the immobilizer are working OK, but they mismatch with the code, or one of them lost the code, or it's something with the antenna...
The parts are the following:
ECU - Bosch 0261206276
Immo box - Magneti Marelli IMM110.01
Does anyone have a signalling diagram of the code recognition sequence that the key, the immo box and the ECU exchange during startup?
How about electronic schematics of the ECU and immobilizer?
I'm trying to understand how the whole sequence works and to see if I can test some parts myself.
One more question:
The ECU and the immo box are both out of the car.
What happens with the coding, is it still there, or does it get reset?
I would appreciate any details or links, I searched across the whole Internet, but found almost nothing...
Thanks a lot for the help!
Douglas