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Author Topic: 1.8T ECU with or without map cooling?  (Read 611 times)
horon6155
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« on: April 12, 2025, 09:52:48 AM »

Hello.

I recently completed a DSG conversion. To ensure communication, I had to replace my control unit 8N0906018Q and installed a 06A906032HJ with 06A906032DJ software. Everything works.

The only problem I have is that the fans keep going on and off. Even when the ignition is on.

Now I suspect that the 06A906032HJ has map-controlled cooling and needs the fan control unit with a 6-pin connector instead of the 14-pin connector I have.

I want to be sure before I start converting to the new fan control unit. Does anyone know if this is the case?

The control unit comes from a 1.8t AUM. Unfortunately, I don't know the year of manufacture, so I can't check whether it has map-controlled cooling or not.
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Schumo
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« Reply #1 on: April 12, 2025, 02:04:25 PM »

They should all use the 14-pin one.

I'd check the wiring (from ECU Pin 40/41 to T10x (orange) 7/8 to the Climate Control Unit).
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horon6155
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« Reply #2 on: April 12, 2025, 02:51:37 PM »

I'll check that out. The strange thing is, when I connect the old control unit, everything's fine. I saw in the wiring diagrams for AUM models from 2002 onwards that they're also available with 6 pins. I don't know if that's correct. The wiring diagram says AUM from 2002 onwards, but it also says "bad."
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dal
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« Reply #3 on: April 12, 2025, 03:44:16 PM »

https://nefariousmotorsports.com/forum/index.php?topic=23529
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JeanAwt
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« Reply #4 on: April 14, 2025, 10:30:07 PM »

Are both with a viscous coupler? I've always wondered if it's easy to adapt a newer unit with two electric fans? Since the option is present in the file. I imagine someone has already done this?
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A4 B5 avant 1.8T 2000 NO QUATTRO
horon6155
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« Reply #5 on: April 15, 2025, 04:32:59 AM »

The problem was PIN 61. dal Thank you for pointing this thread out.
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