Where is the TCU located?

2009 AUDI S8
105,000 MILES • V10 • 4WD • AUTOMATIC
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DIVIDES
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If you can tell me where the TCU is located please.
Sep 6, 2021 at 7:53 AM
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JACOBANDNICKOLAS
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Hi,

Are you referring to the Mechatronics control unit? That is what controls the transmission. If that is correct, it is located in the transmission (valve body).

See pic 1 below. I highlighted the control unit.

Let me know if that helps.

Joe

See pic below.
Sep 6, 2021 at 7:22 PM
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KASEKENNY
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When you say TCU, I assume you mean the transmission control unit? If so, they call this a TCM which is actually the mechatronic unit which is basically the valve body inside the oil pan.

I am attaching the info below on this unit so please take a look at it and let me know if you have questions on this.

Thanks
Sep 6, 2021 at 7:23 PM
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DIVIDES
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Thanks to you both. So this car has no external TCM just like an ECU to the motor?
Sep 6, 2021 at 7:48 PM
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JACOBANDNICKOLAS
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Hi,

That is correct. The module is the mechatronic unit. By the way, great car!!!

Joe
Sep 6, 2021 at 9:19 PM