After having ECU issues with my 55 Octavia I have got hold of a bundle of parts from an 07 BLF engined Octavia.

 

Amongst the parts is the fuse box from behind the battery which differs from my original by having fewer components, and having only ONE muliplug underneath it. I'm hoping that the fuse box ISNT required and that I can leave the original in place

 

I have a feeling that the reason I have been given this with the ECU and other parts is that it is linked by coding to the other parts - but I need to check this before I think about probably returning the part and breaking the car - It has been 6 months off the road now and I'm out of time and patience with it. Shame - its a nice car to drive  with only 81k on the clock, but if I'm honest the issues around getting this sorted has made me wonder if I should look at a different make/model next .

 

Does anyone have any insight ?

Edited 26 August, 20178 yr by warweezil

Fuse boxes will vary between Engine types and extras that are fitted to the car

 

If you need to change your one then the replacement has to mirror the existing one

Thanks for your quick reply. I figured that the extra plug was vital, im trying to figure out if this fusebox unit is Linked in any way to the ECU/Immobiliser/instrument coding.

 

I have the ECU, Steering column , Instrument cluster, the Relay unit from under the dash and this "different" fusebox, all taken from the same vehicle. My original ECU is apparently fried and after an abortive attempt at getting a repair /  replacement for mine I have now hit a problem trying the second hand route. The parts are supposed to be from the same engine code, but are 2 years younger than my car - but still pre FL..

I need to work out if I can use my original fusebox with the replacement unit - hence my question.

 

And I though French cars were difficult to get parts for!

 

 

Edited 26 August, 20178 yr by warweezil

I wouldn't expect you to replace the fusebox.

 

Do you have the existing and new ECU part numbers?

Did the parts also include a key?

 

Assuming the new ECU is a direct replacement for your existing ECU it should work without wiring changes. To allow the immobiliser to work, you'll probably also need the new instrument cluster fitted and immobiliser chip from the new keys.

I hadnt thought of looking at the ECU part numbers, the replacement parts are at work so I cant get at them till Tuesday. The bundle came with 2 keys and a drivers door lock barrel .

 

The replacement steering column has a *cut* black 2 core wire that disappears behind the ignition drum, on the car the wire appears to run up to the instrument cluster and into the cluster plug, Im assuming its ok to splice this when I remove my old Column.

 

The annoying thing is I was happy to pay out for a recon unit, but my experience with BBA Reman has left me very wary of that route now.

There is no need to replace the steering column or door locks.

 

Take a look at the keys, on the flip style it's very easy to remove the key blade so you can transfer the key blade from your old keys to the new to save switching all the lock barrels.

 

I had wondered about that, I was working on just plugging in the bits and seeing if she will finally run (hasnt run since it stopped on the road at the end of Feb), It would be nice to see if the ASR light goes off as well (it came on when the car stopped)

 

I'm sure the 2nd ECU from BBA had a bad code write and my own apparently has a fried chip somewhere I think Im due for some luck.

 

In the great scheme of things an 05 Octy isnt anything amazing, but I actually like this car, it isn't perfect but its good enough and I can improve it  - if I can get it running again - It will do fine....  Until the day come that I can afford a VRS estate......

Edited 27 August, 20178 yr by warweezil

32 minutes ago, warweezil said:

(deleted)

 

Edited 27 August, 20178 yr by warweezil
invalid.

I will have to track down the small black box that came with the bundle too... I forgot about that until today.

 

Managed to swap a key blade today. So.... moving forward.... I hope.

 

Damn mot is out late Sept too......

OK I swapped out the Canbus gateway, The comfort module is different, Im wondering about the unit fitted to the top of the steering column - is it Coded?

 

Fitted the ECU - Changed the Key Bl;ade. The Car still doesn't start - OBD reader still says "Link Error".

 

This car is getting closer to being "parts"

It sounds like you're just changing parts on the off chance they work...

 

If the original ECU was toast, you need the new ECU and instrument cluster fitting as they are linked for the immobiliser. To start the car you'd need the new keys immobiliser chip and the old key blade.

 

There should be no reason to swap the CAN gateway or comfort module unless the originals also had issues.

 

What exactly have you done and at any point were you able to read error codes?

I assume that everything apart from the engine is functioning as normal?

It may be that the time scale makes it look that way - but I have been working through the list as time allows until today when I finally arrived at the point where it was worth trying to start the car.

 

I posted a few days ago that I had a whole "bundle" from an 07 BLF engined car that I found on eBay - This was after an ECU "repair" that didn't change anything - which was then diagnosed as a "dead" unit and an exchange recon unit -  which according to the Auto Sparks was actually powering up the canbus lines but didn't seem to be working beyond putting power on the system (no "command")

 

I have fitted the ECU, Swapped out the key blade and the instrument cluster,  I changed the other parts as and where they fit as they came with the bundle, its hard to know what stupidity the level of coding has reached with modern cars . I decided the safest course was  to install all the components as far as practical, and lacking any firm detail about the way they have locked things up - it would be nice if there was a manual for this model but strangely although there is one for the diesel - there doesn't seem to be one for Petrol models.

 

To be honest once I had failed to start it - and the OBD reader wasn't able to access the system, I decided it was to go home and leave it for another day and a clear mind - and to see if the Snap On kit is available again.

Fuse box definitely not coded but there are different part numbers. I changed my fusebox on mine and was simple plug and play