Have a problem with a 2000 ford fiesta immobilsor not working.
Have no warning light lit up on dash and no comms to scan tool, have checked all fuses, relays and had ecu checked (bba) and tests ok.

any ideals

What is it doing then?

A few more details might help

Dave

Is that the immo does not work,you can start with any key,or the car does not start with correct key or am i suffering from PMT before midnight it must be hallowen

KEV.

"If you dont KNOW how it works, don,t try to test or fix it"

Have you checked the ECU power and earths?

Turn key all ignition light all ok but no life, immob light not lighting up , tried spare key, check all fuses, relays etc but on comms at diagnotic plug but it has power there so cant check key at ecu, had ecu check (bba) but they are not sure if there is a problem with it.

Kev

have you got ignition feed to the main relay?

martin

Sounds like a power feed problem to the ecu more than an immo fault.

Have you checked the feed's and earths at the ecu?

And the main system relay.

Dave

Im assuming this is a 96 onwards Ford Fiasco, if not then ignore this post.

Look in the fuse box in the passenger side rear of the engine bay, you will find two rows of small fuses. The row facing you as you look from the front of the car, 5th along from the left is the immobiliser fuse. Check this hasnt blown, and make sure that there are no empty fuse sockets there too.

I tend to find that people will remove the fuses to check if something else doesnt work, then replace this fuse in the wrong socket as there are usually 2 empty sockets there.

If its a pre 96 Fiasco, then make sure you have 3 black wires going to the negative post on the battery as most people tend to leave off one of the smaller earth leads when removing or charging the battery.

Hope this helps

Paul

-----------------------------------------------------------------------------------------------------

WE HAVE THE TECHNOLOGY !! ( WHERE'S THE POWER BUTTON ?? )

Looked at fiesta again and some idiot had taken the fuse out all together so goes to should double check all fuses and not to listen to the AA when they tow you something in.
Fuse taken out what for, i dont know ???????

Kev