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Old 29-04-2004   #1
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Seicento SX 2001 won't start

I purchased a Fiat Seicento SX 2001. The car has 120 miles on the clock and has never been used.

It came with no manuals. It was running fine when I got it and was able to take it out on a few occasions, but the inside light was left on and the battery went flat, I charged the battery, now it seams to be immobilized and I cannot start it. The engine turns, but it doesn’t start. He has ¾ full tank of fresh petrol. The oil level is correct and the system is full with coolant. I can hear the fuel pump.

Is there anything I can do to get it working, I have the blue key, with the transponder symbol with the number 2 on the metal of the key, so it must be a 2nd generation immobilizer, i.e. doesn’t require a red key. Can you help me with the following?

How can I get the car to start again?

Where can I get manuals?

What services does the car require? With only 120 miles on it, I am sure it has never been serviced.

I appreciate any help anyone can provide.
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Old 29-04-2004   #2
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when you turn on the ignition and wait does the immobiliser code light go out?

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Old 29-04-2004   #3
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I just ran out and checked, the key light is not comming on... does this mean my blue key is damaged... but it looks ok, It has only been in my pocket. Is there anything that can damage the key. Its a second gen so there is no red key.
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Old 29-04-2004   #4
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sounds like you may have a prob with the immob' circuit as i would have guessed even with a duff key the light would still come on,just not go off.i dont know the newer system so hopefully one of the guys will be on soon to help.1st thing i would check is all the connections to the ECU etc as the cars obviously been sitting for a while

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Old 29-04-2004   #5
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Thanks for the pointer, I will check it out tomorrow when there is some daylight
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Old 29-04-2004   #6
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have you charged up the battery to full capacity? sometimes if ur tryin to jump it off another battery they won't start, not sure why. U sure the battery isn't faulty? if they discharge all the way, sometimes they won't charge back up properly. My first port of call would be to get someone with a similarly sized battery and 'borrow' it

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Old 30-04-2004   #7
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try reseting the fuel cut off which will now be active.

look under the dash in the centre and there is a grey box, put your hand up inside the box and press the button in there. it is very awkward to do but it will start afterwards i guarentee it!!!

i love novas but its time for a change
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Old 08-05-2004   #8
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Thanks everyone for your sugestions. So far no joy. I spoke to fiat, they suggested to check all fuses which I have done. But still the key symbol is not lighting up and the car won't start. Is anyone familiar with the immobilizer on the 2001 Seicento SX? Is there anyway to bypass it? What would cause the key symbol light not to come on when the key is turned?
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Old 09-05-2004   #9
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have you checked the fuses behind the battery and the wiper motor?

if all else fails ask fiat for a wiring diagram for the immobiliser and they should give it to you if you have a couple of items of ID

i love novas but its time for a change
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Old 23-10-2004   #10
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Thumbs up Re: Seicento SX 2001 won't start

Quick note on this problem. I took it to a fiat Garage, after a few hundred euro and a couple of weeks, the problem was a cigerette sized mobilizer box under the steering column, it had blown and had to be replace. Once that was done, all was well.
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Old 26-11-2008   #11
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Re: Seicento SX 2001 won't start

Hi I have a similar problem, on the exact same car. My code light comes on, but goes out though. I don't want to take it to a garage ...I can't even move it , these things are a pain. Have you any advice on how I could check any points on mine ....I 've checked the fuses and reseted the ECU and the connector on the immobilizer ...and charged the battery, checke the coils and pulled the two end spark plugs out and confirmed there is no spark...checked the engine earth. These black boxes are a pain....I think I'll have to go to fiat after all!
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Old 27-11-2008   #12
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Re: Seicento SX 2001 won't start

Aidme,

The immobiliser light appears to be acting normally but are the battery connections clean and tight since it's been charged.

Also have you tried resetting the fuel cut off as per post #7? Am I right in thinking that if there's no fuel the ecu won't allow it to spark either?
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Last edited by seicentom; 27-11-2008 at 08:31.
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Old 27-11-2008   #13
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Re: Seicento SX 2001 won't start

I think he said that he can hear the fuel pump, and the fuel cutoff switch cuts the power from the pump.
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