Immobiliser problem

[roy g]

I know this subject has been discussed in the past and that details are available for by-passing Meta immobilisers.
My problem is that my S3 has gone from running perfectly to cutting out completely, without warning. It will then start straightaway after inserting the fob only to cut out again after a few seconds.
I can overcome the problem by hot wiring the coil from the battery and would imagine that this provides a good clue to you buffs out there as to what is happening.
So my question is can anybody shed some light on this matter? Assuming I’m right would you pm me the details for bypassing the immobiliser.
Many thanks.
Roy

[v8s4me]

Can you cut the immobiliser out completely and splice the loom back to original?

[mentall]

With this kind of problem, ALWAYS check the infamous yellow connector first. Assuming it's still there, of course.

[roy g]

I’ve already changed the yellow connector, and yes I would like to bypass the immobiliser.
Looking back at the old posts I believe that this can be done relatively simply without cutting and splicing the loom. Can anybody let me have the details for doing this?

[roy g]

Further to my previous posting - can anybody advise me where I can make a permanent connection to the + terminal on the coil which will override the immobiliser?
Roy

[roy g]

Continuing my quest to bypass the immobiliser, can anyone tell me if this what I’m looking for?

[GreenV8S]

roy g said:

Assuming I’m right would you pm me the details for bypassing the immobiliser.

The ECU main power and coil +ve supply would originally have come from the ignition switch. The immobiliser is spliced into the supply. The hack to remove the immobilser is to disconnect the plug at the immobiliser and use a link wire to complete the connection. The proper fix is to remove the splice and reinstate the original circuit.

Note that some immobilisers intercept multiple circuits, typically some combination of ignition, starter solenoid trigger, fuel pump, fuel gauge. If you remove the immobiliser you'd need to reinstate all the circuits that it intercepted.

Do consider the effect on insurance.

[roy g]

Thank you Green V8S
Is that the immobiliser in the picture with the red power supply feed?

[mentall]

That's a Lucas Dim-dip Module as was typically fitted to our cars. Nothing to do with the immobiliser.

Functionally, it's a good idea to get rid of it (lots of useful advice on-line) as dim-dip is no longer required by law.

Unless you want to keep your vehicle original, of course...

[roy g]

Aah!
Thanks for enlightening me. I’ll have another look tomorrow.