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MG MGF Technical - Immobiliser woes?
|Sorry to be insistent mates. I need to learn if it is possible that the alarm/immobiliser completely cut the ECU and the ignition. I wonder if any of you could perhaps illustrate me about that possibility and perhaps send me a sketch of the connections between the immobilizer and the ECU. Is it possible to measure if the ECU is receiving a signal from the immobiliser after turning the key? My car would not start and everything seems to be right. Immobiliser perhaps? David |
I'm afraid, this is a sensitive point of discussion at a public BBS due to security against burglars.
The *how to* ... ?
I daubt you will get brief instructions, even if anyone knows.
Anyway, try http://www.mgfcar.de/schedules/sb16.jpg
|Thanks Dieter. You are quite right about security matters, I understand. My problem is that after checking everything and replacing many, the engine still would not start. So I need to learn if the immobiliser may completely block ignition in a not reversible way. Or if that would not be the case if there is any way that may allow us to measure if the ECU is receiving a signal from the immobiliser. David|
|David, checks - the dash light is connected to the imobalizer, so you can see it working.|
The fuel pump is not switched by the imobalizer, so it should prime when you first touch the key
|The handbook shows a way of disabling the immobiliser - you will need a 4-digit code.|
There should be no output from the coil if MEMS is immobilised - and no input to the coil !
Is this at the garage that was using a 'scope to investigate ? If so, what are they reporting ? Dead HT ? and are they also reporting dead input to the coil ?
|>The handbook shows a way of disabling the immobiliser - you will need a 4-digit code.|
This disables the 5AS passive imobilizer, but not the MEMS imobilizer function.
The coil should have +ve feed perment, and the -ve side should be switched by the MEMS, I dont remember if the starter circuit is governed by the 5AS directly or thru the MEMS.
This thread was discussed between 16/02/2004 and 17/02/2004
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