I have proudly been a owner of a P reg Cinq for the last 4 weeks or so.

I had intermittent starting issue so replaced the crank sensor. All working again or so i thought.

On the way back from pickup some punto sporting alloys today, stopped the car to check something. Didn't start again.
Ended being towed home by breakdown company.

Anyways they tested the car at the roadside and no spark and no fuel being pumped.
He said it MUST be the immobiliser :bang:

When i got back i took off the crank sensor to see if it needed remounting.
Nothing doing. Still wont start.
In the fiat paperwork i found a piece of paper stating that "at the request of the UK insurance companies no immobilisation code will be supplied with my car" and to call a number 0800 717000.
So i called, guess what...disconnected. Figures this was 12+ years ago.
So i called a fiat dealer, who said they could get the code but only on monday morning (when i am suppose to be at work)!!

I am reading out in desparation to anyone reading this.
I need to get it working, any ideas. If anyone reading this can get the code, i am sure we can reach a financial understanding

Really need to get it working for work monday morning.

He said it MUST be the immobiliser

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Unless the CODE light is on, it's unlikely. Anyway, the immobiliser will cut either fuel or spark, but not both (can't remember which).

When you say

no spark and no fuel being pumped

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, precisely what do you mean?

A faulty crank sensor will cause no fuel past the injector and no spark (essentially the ECU thinks the engine isn't turning, so cuts the spark and doesn't open the injector, but the fuel pump will still prime and you should be able to hear it). A faulty main relay (or, more likely, the wiring to it) might kill the fuel pump and ignition.

The main relay is a white box, about 3" x 1" mounted on a bracket generally at the front passenger side of the engine bay.

Ok well code light goes out. There is no pump priming or any noise at all.

When i say no fuel i mean when hose is disconnected and engine cranked. No fuel is ejected. When i say no spark. The tester glow plug not glowing on turn over.

I only replaced the crank sensor about 2 weeks ago so i am hoping it is not that. I will look for that relay.
Is there any way to test the relay or the crank sensor?

Ok found it. Just checking for replacements on ebay but drew a blank. What should i be searching for.

Ring Big Mick at eurocarcare.net -- he'll know (and have one sitting on the shelf). Or Skype him.

Alternatively, CentoPainter or jiminwatford (members here, you can pm them) may have a known good s/h one.

fingers99 said:

Unless the CODE light is on, it's unlikely. Anyway, the immobiliser will cut either fuel or spark, but not both (can't remember which).

When you say , precisely what do you mean?

A faulty crank sensor will cause no fuel past the injector and no spark (essentially the ECU thinks the engine isn't turning, so cuts the spark and doesn't open the injector, but the fuel pump will still prime and you should be able to hear it). A faulty main relay (or, more likely, the wiring to it) might kill the fuel pump and ignition.

The main relay is a white box, about 3" x 1" mounted on a bracket generally at the front passenger side of the engine bay.

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Well Feck, bugger me.
It would appear i have the car working.

You were spot on, but the story is not straight forward.
Last weekend i had a clifford alarm fitted. Didnt really look where the guy had put the siren.
Anyways went looking for the 'White' box and found it to the right of the ECU.
When i looked, he had bent the cables over the new siren (looked like he was stressing the cables out.)
Being the curious person i am and the fact that the original yellow seal was still on the joint for the relay, i assumed he must have unbolted it and put it back afterwards.
I unclipped it and noticed some water in there.
Cleaned it out and reconnected it, leaving it loose in the engine bay (wasn't sure if the nut and bolt earthed the relay?)
Cranked it over and one turn of the started fired it into life.

Needless to say i am very happy

I would like to thank all for your help, this forum is invaluable. You rock! :slayer:

I have attached some images of the 'Assed up' alarm work!

Well done!

In the alarm fitter's defense, it's bloody difficult to find room under a Cinq bonnet!

fingers99 said:

Well done!

In the alarm fitter's defense, it's bloody difficult to find room under a Cinq bonnet!

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Spoke too soon. Thought i would try the car this morning. Nothing again.
I have touched nothing overnight, the engine was cold last night when it started, as it was this morning. :bang:

This car is one day away from a scrapper. Wife has had enough and it will as of tuesday affect the financial income of our family. (No car, No work!)

Looking for any final devine intervention, before i ebay this bi*ch. :worship:

Is there anyway to test the ECU relay to see if it is faulty?
Volt meter etc.

PS i am reaching out to fiat tomorrow to get the code. Does anyone have any experience getting a code from a dealership in the past?

Ironically it only has 25k on the clock, owned from new by a 80 year old. Service every year without fail...

I suspect that the relay can be tested, but substitution is likely to be easier. The early Sei has the same basic system, so the diagrams will give you an idea of what's supposed to happen.

I still can't see it being the code.

Wiggle wiggle. My best guess is some issue -- perhaps mechanical -- between the new alarm (which probably has its own immobiliser) and the main relay. Contact Clifford or the fitter?

fingers99 said:

I suspect that the relay can be tested, but substitution is likely to be easier. The early Sei has the same basic system, so the diagrams will give you an idea of what's supposed to happen.

I still can't see it being the code.

Wiggle wiggle. My best guess is some issue -- perhaps mechanical -- between the new alarm (which probably has its own immobiliser) and the main relay. Contact Clifford or the fitter?

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After speaking to alarm fitters yesterday, it only disables the start motor (not cat 1).
Since it turns over, they have wiped their hands of the issue.
I have found a auction on ebay that has relays - The only one, so hope i win it.
If i strike out, i will be giving Big Mick a call. Hopefully i can get next day delivery.

those relays are used on a good few different cars and vans etc.

My old Citroen dispatch (the HDI one) had the same relay, the fiat Scudo and peugeot one.

as far as I know most of the 2 litre hdi's had it.

I took the one in my van apart and cleaned the contacts and it worked fine, i also had water in mine.

hope that helps.

dont waste your money on the fiat code
p reg fiat had the immobilisor black box under the dash i seem to remember its quite possible this has faulty connector or indeed gone faulty or the ecu itself or the wiring from the crank sensor might be suffering from old age or water ingress or indeed chafing from the cambelt
why not get a recommended garage to look at it rather than pulling your hair out
that immobiliser guy needs a new job

** Update **

Its fixed. I thought i would add the fix in-case someone else has this issue in the future.

So i spoke to a few car parts dealers and they had the new double relays (Injector/Ignition relays) for £50. However most said they had had very few requests for this part ever?
Though it was strange to say that but...
I spoke to a place called D A Motors Ltd in Essex (Fiat ONLY breakers) and they had one, Result!
Two hour round trip and a tenner lighter, connected it up and fired FIRST time. I am very happy so this i my findings for the non-starting cinquecento error:

Not Cranking - Check starter motor/solonoid
If you have a alarm - Check that.
Cranking, Spark, LOCK showing - Fiat Immobilised, Check ECU/Keys
Cranking, Pump priming noise, LOCK disappearing - Check/Replace Crank Sensor
Cranking, No spark, No Priming, LOCK disappearing - Check/Replace Double Injector /Ignition 'White' ECU Relay

Given the headache this has been giving me, it was the least i could do was write up my findings.

Ah, also worth noting. If you do unplug the relay and find water/damp in it. Don't wait, replace it - If not have a tow truck following you for the day it fails to start for ever!

Small Plug - If you live in the south and need a part, give D A Motors (Wickford, Essex) call on 01268 767424

more people should write the ultimate solution to their problem, too many threads end up in the air

blu73 said:

more people should write the ultimate solution to their problem, too many threads end up in the air

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Cheers

Im having also this problem in mine. I have temporary workaround if someone wants to hear. If you turn the key without starting the engine you can clearly hear the sound of the fuel being pressurized. If you dont hear it, disconnect ignition and connect again until you hear. Then start the engine ...

Coz you hear the fuel pump priming, it doesn't sound like the relay. More like the crank sensor to me.
It is a 5 minute fix when you have the drivers wheel off and the inner wheel arch covers.

If you do replace it and the issue is still happening, give D A Motors call on 01268 767424 - replacement relay £15 to your door. Sorted.