ECU Calculator Locked C5 2,0 SC KBI -04

[GiveMeABreak]

This is not good news,and I completely understand how frustrating this is for you.

I would suspect a dry solder joint or a bad wiring connection, as it would seem that when the car is war it starts as the contact expands and fails when it is cold when it contracts. The engine fuse box may well be the culprit and if you think about it could also be why the immobiliser it kicking in as it is not getting the ok from the BSI / Engine ECU because of the electrical communication fault in the circuit.

If you can get a spare engine fuse box from a scrap dealer and try that - it would at least show the dealer that they did not diagnose it correctly. Also it would highlight that they replaced the engine ECU unnecessarily - so I would be looking for a refund for the part and labour cost and the cost for the incorrect diagnosis if it turned out to be the case.

In the first place I would contact Citroen Head Office and explain the situation and give them a chance to sort this out. I say this as if you go ahead straight away and change the fuse box over yourself, they might deny that this caused the problem. Better to get Citroen to sort it out at their expense - whilst the car is still with them and the issue is still there, that way they cannot say you have had the car back and interfered with it.

Sometimes ringing Citroen Head Office can have a good result. At the same time I would contact your local equivalent to our 'Trading Standard' that may be able to advise you on the next course of action in your Country and the best way to proceed.

You have paid for a proper official diagnostic, they have replaced and charged you for work that seems to be incorrect if the fuse box can be identified as the issue. They have made a mistake and charged you for parts that may not of been the cause, so you must stick with it and put the pressure back on them and possibly look at what legal options you have if Head Office are not sympathetic. Above all, keep a chronological list of what happened and the sequence of events in a clear format and keep to the facts. Record all the dates and the conversations and the outcomes so you have evidence.

[femtiolappen]

The fuse box in the engine compartment has tested with another box but with the same result! They now think it's the Fuse box inside the car.

But should they continue with it, they want to have paid for troubleshooting and for a new fuse box inside the car.

I have talked to the Swedish Consumer Agency and they say that Citroën made an agreement with me when they said the car would work if they changed the injection ECU and then it will work even if it's hot or cold!

[GiveMeABreak]

Ok, so I misunderstood you - the 'fuse box' inside the driver's storage flip down tray compartment is attached to the 'BSI' this is the main computer brain that controls all the other ECUs in the car and works with the engine fuse box (slave to the BSI).#

I really don't know what to suggest as you have paid for the problem to be diagnosed, paid for a replacement part to be fitted and configured and the car is not working properly. I cannot accept anything relating to the 'hot or cold' issue except when there is a faulty dry solder joint somewhere that is causing intermittent electrical issues.

They have not done their job properly as you have paid to resolve the problem you had and it is not resolved - end of story. Keep on at them, if they have replaced a part that was not faulty, then that is not your problem.

[MikeT]

I have talked to the Swedish Consumer Agency and they say that Citroën made an agreement with me when they said the car would work if they changed the injection ECU and then it will work even if it's hot or cold!

Taking this as read, I see it to mean you should expect a fix at no further cost to yourself. If the garage says it needs yet more parts then the garage/Citroen should bear that cost, not you.

[femtiolappen]

is it possible for me to bypass the immobilizer?

Tomorrow I will pick up my non-functioning car because they refuse to do anything more! I have talked to Citroen in Sweden and they would return, I have also been clear from Swedish consumer law to make a notification on the workshop!

[GiveMeABreak]

No the immobiliser is linked to the injection ECU and the BSI - they will lock without the transponder code unfortunately.

[femtiolappen]

If i take the Injection ECU from a difrent car and the BSI inside car and also the ignition and keys?

I have a Citroën with the same engine but its a Automatic gear box in it!

[GiveMeABreak]

The BSI, engine ECU and Key chips must be a matched set. You don’t need the receiver from the steering wheel module or the ring, that is just the receiver and transmits the code to the BSI. The transponder chips are inside the key fobs.

Your other donor car will likely have different options fitted, possibly different ECUs and of course will be configured for an auto. You will need a diagnostic tool like Lexia or Diagbox to configure the BSI to set all the options up correctly. You will also need to configure the VIN code to the BSI for the car it is going into.

Ensure that the battery is removed before changing the BSI and other components.

If you are going to attempt this, remember to use Lexia to go through the existing BSI and write down the name of the ECUs found under Global Test, and also all the configuration options on the old BSI BEFORE you disconnect it. You will need all this information to code the donor BSI to your car.

This does carry some risk, so you need to think about it. Also is the donor injection ECU the same part number as your existing car?

[xantos]

I had the same problem with Xantia. One day the "key" light in the dashboard didn't switch off and the car wouldn't start. The cause was a corroded wire somewhere under the battery tray. So you might be looking in a wrong direction...

[GiveMeABreak]

It is a completely different system to the Xantia, it doesn’t have a CPH.

[xantos]

It is a completely different system to the Xantia, it doesn’t have a CPH.

Ohhh right... But a broken wire could be a suspect?

[femtiolappen]

Byt till svenska
I find it strange that the car starts with new injection ecu when it is indoors while the old does not work at all?

[xantos]

It could be also a flat battery. I know that bad batteries can make all sorts of problems...

Didn't read the whole post but did you try with a new battery? Maybe just recharge it or borrow one from a friend...

[femtiolappen]

There is nothing wrong with the battery! They have tested with another battery!
Yesterday I picked up the car! It was rolled into the workshop and started after about 5min! Running the car home 60km I parked and waited for 1 hour, it started without a problem! Waited for 2 hour and it even started without any problems!
After a night out, it does not start now it's around 6c degrees outside

[GiveMeABreak]

Like I mentioned in an earlier post - that really sounds like an expanding and contracting solder joint or connector pin as the temperature increases and decreases. If you can get a second hand Engine Fuse Box to try, that would surely confirm or eliminate that component.

I can get the part number for you if you PM or post your VIN to me.