ECU differences: EDC15 vs. EDC15+

Hello everyone.

The engine control unit (ECU) in my Lupo 1.4 TDI has failed.
No more starts are possible, and it can no longer be accessed with VCDS.
Power supply is okay, but it also depends on the device.

Now, I would install a used replacement part. What should I pay attention to when purchasing the right control unit?

I have received several offers where the part number from VW is 045 906 019 S and the part number from Bosch is 0 281 010 529, and they match.
My control unit is from April 27, 2000, and the replacement would be from February 10, 2002.


"On my old one, it just says 'Diesel', but on some others, it says 'Diesel EDC15+'."
Is there a difference?

What exactly should I pay attention to in order to buy the right replacement part?
Perhaps the software version is different; how can I determine that?

Regards, Mpire.

Here's another older car scan from MSTG.

Vehicle type: 6X - VW Lupo
Scan: 01 02 03 08 15 17 19 25 35 37 44 45 55 56

Vehicle Identification Number: WVWZZZ6XZ1Wxxxxxx Mileage: 103,330 km
"Der schnelle braune Fuchs springt über den faulen Hund."
Address 01: Engine Label file: RKS\045-906-019-AMF.lbl
Part number: 045 906 019 S.
Component: 1.4L R3 EDC G040SG 1208
Encoding: 00005
Operating number: WSC 01236
VCID: 25459E879571
WVWZZZ6XZ1Wxxxxxxx

No errors found.
Readiness: 0 0 X X X

Hello,

You need: 045 906 019 S.
What else is written there is mostly unimportant.

Best regards, Rainer.

Okay. Thank you.

Unfortunately, we can't get the Lupo to start.

The "new" control unit with the same number has been installed, and the engine at least starts briefly, but then the immobilizer shuts it off. I didn't receive a code tag from the original owner.
He's been at VW since yesterday, but they're having trouble with the configuration process because the system in Wolfsburg is interrupting the new coding process. The VW dealer wants to replace the engine control unit (ECU), window regulator, and reading coil.
What options do I have now? I'm really at a loss, as we urgently need the vehicle.


Regards, Mpire.

What generation of immobilizer system does it have, generation 1 or 2?
Vehicles manufactured in 1998 should still be of the first generation. Then you need a login.

A complete car scan would also be beneficial.

Either find someone who can read the login data from the Steuergerät (control unit) with ID 25, or disable the immobilizer (Immo).

Determine the WFS generation.

For WFS2, which is within the realm of possibility, only the adaptation channel 0 needs to be reset in the combination instrument (address 17) by writing a value of 0.

Lupo is running again.

Up to production date 06/2000, the Lupo WFS1 was equipped with an external WFS control unit. The "new" control unit is from 2/2002 and, despite having the same part number WFS2, which is then integrated into the instrument cluster.
That's what the repair company said. VW couldn't tell me anything about it .

The "old" defective device was opened to inspect it. The chip was re-soldered because there was suspicion of a faulty solder joint. The data was re-flashed. Nothing more needed to be programmed; the vehicle is running perfectly again, and the error memory is clear.

Thank you for your quick help; that was a good tip about WFS generation.

Regards, Mpire.

Actually, nothing should have needed to be soldered onto the control unit in the first place, as it has been readable and writable via OBD since time immemorial. Consequently, the cause of the error would also have been eliminated.

If you had mentioned it from the beginning, I would have also suggested checking it out.

Nothing had ever been soldered to the control unit before. It had never been removed. However, it was hanging loosely because one of the plastic holders was broken. It was opened based on suspicion alone.


Best regards,
Gruss Mpire.

Okay, thank you for the feedback!