ECU Swap - 2000 ARC engine

Chat about your MKV (6N2) Polo GTi
Post Reply
User avatar
937carrera
Silver Member
Posts: 432
Joined: Sat May 17, 2014 8:19 am
Drives: 2000 Polo GTi
Location: North Yorkshire

ECU Swap - 2000 ARC engine

Post by 937carrera »

I want to try an ECU swap to see if that fixes my running rich probale and now have a used ECU.

I have alreadyy simply tried a swap over. The central locking and rediuo continued to work but the car would not start, presumably because of the immobilser. I believe the car is fitted with IMMOB 3 and have been able to get my immobilisor code out

Does anyone know if it is possible for me to recode the ECU to the car myself, or will I need a garage to do the work ? From my research so far I am getting conflicting information.

Most sources say I need a PIN code for my car (which I don't have) to pair the used ECU to the immobilisor. However, ElsaWin says the following

Engine code: ARC

Special tools, workshop equipment, testers, measuring instruments and auxiliary items required

◆ Fault reader V.A.G 1551 or vehicle system tester V.A.G 1552 with cable V.A.G 1551/3



Conditions

● Authorized vehicle key required.
Work sequence

‒ → Remove ash tray -1-.
‒ Connect fault reader V.A.G 1551 or vehicle system tester V.A.G 1552 with cable V.A.G 1551/3.
‒ Switch on ignition.
‒ Operate fault reader or vehicle system tester taking into account the information on the display:
‒ Press key 1 for "Rapid data transfer".
‒ Press keys 2 and 5 for address word "Immobilizer" and confirm entry with Q key.
‒ Press the ⇒key.


→ Indicated on display: Rapid data transfer HELP
Select function XXX

‒ Press keys 1 and 0 for function "Adaption" and confirm entry with Q key.


→ Indicated on display: Adaption
Feed in channel number XX

‒ Press key 0 twice for "Channel number 0" and confirm entry with Q key.


→ Indicated on display: Adaption Q
Erase learnt values?

‒ Confirm input with Q key.


→ Indicated on display: Adaption ⇒
Learnt values have been erased

‒ Conclude adaption by pressing ⇒ key.
‒ Press keys 0 and 6 for the function "End output" and confirm entry with the Q key.
‒ Switch off ignition.
Note:

The identity of the engine control unit is read into the immobilizer control unit when next switching the ignition on.
I would appreciate some advice about if this is how it works. On the one hand VW should give out better information than the internet, but the last thing I want to do is attempt a recode and end up in a position where neither ECU will start the car :roll:
User avatar
alexperkins
Site Admin
Posts: 14873
Joined: Sat Nov 11, 2006 5:29 pm
Drives: 91 Golf GTI, 01 TT 225, 54 T5 174
Location: Poole, Dorset, UK.
Contact:

Re: ECU Swap - 2000 ARC engine

Post by alexperkins »

The ELSAWIN procedure reads logical

Its possible youll need to login to the immo with the PIN though in order to make it learn, however it doesnt specify that whereas it normally would

I'd try it personally.
Post Reply