Multiecuscan

HI ALL . i am new to your forum,and if this question been befeore, sorry I own a fiat punto grand 2007 and it will not start,on the display it shows the lock sign,which ive been told is the immobiliser, can some one tell how you can clear this symbol and get the car to start, thanks REG

Yes this is an immobiliser issue. The Key Code Unit / ECU are not recognising your key.

Common causes for this are:

1) Key security chip failure - have you tried another key
2) Aerial failure - there is a special pickup aerial cold around/behind the ignition key slot - these have been known to have faulty connection
3) Key Code Unit failure or loss of power
4) Broken engine ECU security function (this is very very rare so I would focus on 1, 2 and 3 above). Also the ECU security function can be ruled out if you can start your car with the "Emergency Start Procedure". However to test this you will have to have your car's security PIN code. Depending on which country you a resident in you may not have this code supplied with the car.

thanks. ive taken the plastic {black} from around the steering and can gain access to ignition switch, what does the aerial pick pick up look like? ive also clean any connection i can see@

I've never seen the aerial coil on a Punto. It is either attached to the back of the cowling you took off or is located around the key barrel. Probably a moulded ring or other 'block' with wires attached.

Sorry I can't be more specific.

PLEASE NOTE! ALWAYS disconnect the car battery terminals and let car stand for about 20 minutes BEFORE connecting or disconnecting any connectors! If you do not do so then you can trigger other errors (e.g. airbag warning/error) that will require diagnostic kit to reset.

thanks, ill have a good look thursday after work, pam

pam01 wrote:thanks, ill have a good look thursday after work, pam

This is were I've got up to now I've checked coil with a meter and its ok the wires that are attached to the coil and when the ignition is on power comes to these wires, can anyone suggest what to do next or what to check????

thanks to all who tried to help me sort this problem, the punto is now running, the fault was with the ECU, and i didnt used the dealer for the new ECU, But i hade to have them code the new ECU, to the car, thanks