Got another mechanic to check the car over - he suspects the ECU has a fault. Unit removed and sent for test and hopefully repair. I will let you know the outcome.

any update on your problem? what was the cause?

Got the ECU back - tested ok - no fault found. There is a fault code stored in the ECU which the tester says is an an immobiliser fault and can only be reset via the ODB connection.So its off to the main dealers - perhaps it should have gone there from the start.

Back again and no joy whatsoever.Still refuses to fire up.Can anyone explain what the immobiliser does?I have been advised to change the ecu,immobiliser and keys but I am unsure wether to or not as I keep spending £s and getting nowhere.If anyone can let me have a wiring diagram it would be appreciated.

Il try to get that up. Sorry ive been super busy. The immobilizer doesnt really cut out the engines starter, but it does cut out spark / fuel injectors so the engine will not start. In all cases it will crank over but not start. The immobilizer is part of the BEM , the Body Electronics Module. The BEM has the Immobilizer and Alarm etc and all these things intergrated into it. Ive stated in a very early post in this topic it may be an immobilizer issue. The Ignitin switch with its transnsponder sends a code to the BEM and it must match and the BEM sends the signal to the PCM and enables spark and fuel delivery.

One the main things to check would be the Ignition transponder and the BEM

The problem is no spark - the injectors are working and petrol is getting through when cranking over.Please advise.

Mechanic suspects that the reference signal to the coil pack is too low - 1.5 volts - and the transistor is not switching.Can anyone confirm this and tell me the correct voltage?Also if the reference signal voltage is too low how can it be cured?

The reference signal is low , reference signals are normally same as grounded signals . As in this way it is set up internally like a relay. It has a constant ground , switched power that acts for both source and a reference that makes it power over. The coils can be checked for spark by probing the reference wire on the coil with a continuity tester ,with the coil plugged.

Still trying to get the car started.Here are the wiring diagrams if anyone needs them.

So yuve checked every fuse? Engine PCM relay . etc. well must be cause the fuel pump is working. I cant think of anything else myself unless my hands were on it.

Hi! hope this would help you or others in the future. I had the same problem this summer, engine died all of a sudden, no faulty code. towed to dealership and took them 2 days to find out the cause: on of the power transistors failed. I think its connected to ignition coil that generates sparks, some kind of switching function.

Best,

Yur model and his has 2 slightly different ignition systems , completely different if yu have a V6. As in on the V6 model has a power transistor for the distributor and coil setup. If yu have a 4 cyl yu have 2 ignition coils with the power transistor as part of the ignition coil, as for he has indentical 4cyl as would be an american 1999-2003 galant but the engine managment system and ignition is different. It also uses 4 ignition coils , 1 per cylinder in this case as opposed to non GDI models and that vary with 2 coils per engine. The 1 coil operating 2 cylinders at a time.